eccentric screw pump

It's like d sideburn of ur car. U've got to keep it shiny & new, to not lose d cool. Chck out #NewLing on #MilkADeal

2011-08-23T20:28:00.000-07:00

It's like d sideburn of ur car. U've got to keep it shiny & new, to not lose d cool. Chck out #NewLing on #MilkADeal

Rotary Vane Pump

2010-10-06T10:03:00.000-07:00

There are many kinds of vane pumps. The most simple of these is the rotary vane pump. This pumps consists of a circular rotor spinning inside of a larger circular hole. The centers of these circles are offset from each other, which introduces some eccentricity into their rotations. Vanes then slide in and out of the rotor and then seal all the edges. This creates vane chambers that do the pumping.

The chambers increase their volume on the intake side. The fluid is forced into the chambers by inlet pressure. Generally this pressure is nothing more than pressure from the atmosphere. On the opposite side, the chamber decrease in volume by forcing the fluid out of the rotary vane pump. The vane's actions drives the same amount of fluid on every rotation of the pump.

There are many uses of the rotary vane pump. Among the most common are high pressure hydraulic pumps. There are also several automotive uses. Some of these are supercharging, automatic transmission pumps and power steering. There are also several mid-range pressure uses. You can find these pumps in carbonators for fountain drink dispensers, also espresso machines.

There are also automotive mid-range pressure uses, like vacuum pumps that are used with braking boosters to provide braking in the large trucks. They are also found in light aircraft to make the gyroscopic flight instruments, attitude and heating indicators work. The rotary vane pumps can also be use in low-pressure gas applications. These include helping with auto exhaust emission controls with secondary air injections. They also work in vacuum applications like evacuating refrigerant lines.

They are also used in vacuum experiments in physics. For this pumped gas and oil are mixed in the pump. They must then be separated externally. The inlet and the outlets have must have a large chamber so that the oil drops can fall while the gas rises. Finally everything exits out through the outlet so that they are separated from one another.

article source-john pummerly

eccentric screw pump-Using Hand Water Pumps As a Backup

2010-08-28T08:31:00.000-07:00

The concept of a well often has negative connotations. The image of a well and pump is that of an isolated town with no water supply; citizens need to pump from a single water source for a day's worth of water for drinking, cooking, and bathing. Or, there's the image of the antiquated stone well filling up with rain water. Those needing water dip a bucket inside and pull a few gallons out.

While both of these images aren't entirely fabricated, well use, in the modern sense, is far more pervasive than many think. On a practical level, well pumps - motorized and manual versions - are needed in remote areas without a water source. A well, in these cases, is dug into the earth to an aquifer, and a motorized or manual pump brings up the water from underground. For others, especially those in the sustainable living community, well pumps are a way of life.

When water isn't too far below the surface, shallow well pumps are appropriate. This type is a jet motorized pump that is mounted above ground and draws up water through suction, much like the way you draw up liquid through a straw. Deep well pumps, on the other hand, are needed in many cases, and these use a jet or submersible pump to bring water up from the ground. A deep well jet pump uses a combination of suction and pressure to lift water, and installation often needs a 35-foot tail pipe to go farther into the ground.

A submersible well pump, on the other hand, is underground and has a cylindrical shape in which the bottom half of the pump is a sealed motor connected to an aboveground power source. These pumps can last for 20 to 25 years, but what happens when the power goes out?

Hand water pumps, in this case, bring water up to the surface at a rate of five gallons per hour with normal water pressure. Simple hand water pumps are used commonly as backup, and the basic model consists of a 24-inch handle, with a 36-inch optional handle. The extended option has its benefits, including the use of less force and a greater depth for bringing up water. No matter if a motorized or hand water pump is used, the system of using a well, instead of a traditional water source, cuts costs and dependency.

Low maintenance, hand water pumps often have a 50-year lifespan, and only minor adjustments will need to be made on occasion during that time. These hand water pumps are designed for use with deep and shallow wells, although they can also be used on their own in two to eight-inch wells. When hand water pumps are used alone, they can continue to be used manually or a motor can be attached, which will operate by battery or solar power. For the latter, the pump can be hooked up to a 130-watt solar panel to give a household that consumes 250 gallons per day enough water. If more than this amount is consumed, an additional solar panel will be needed.

Hand water pumps are lead-free and are made from CNC-machined stainless steel. All are Safe Drinking Water Act compliant and will work with existing jet or submersible well systems.

Motorized well pumps use traditional and solar electricity sources, but this isn't always consistent. Instead, a hand water pump should always be kept for backup. Hand water pumps attach to the current well system and can be used next to the motorized pump.

article by irene test

eccentric screw pump-5 Reasons Why a Breast Pump is Important in Breastfeeding

2010-05-25T19:52:00.000-07:00

Most of us know the benefits of breast milk. Whether you are the working mom or stay at home mom, if given the options, most of us would prefer to breastfeed as long as we can. To make that possible we need help. The breast pump is important equipment that breastfeeding mother should consider as her best friend.

Some may feel that it is possible to express milk without using breast pump. It is true. However, it is going to be a rather difficult experience. Let me share with you some reasons why you should consider using it.

First and foremost, if you are returning to work and you have every intention to continue breastfeeding, then you need to have one. You are going to be expressing your milk many sessions a day while you are at work. It would be a waste of time to actually express your milk by hands. In fact, the more effective way is to use double pumps to help you save time.

To get more milk supply coming in, you need to stimulate the breasts as often as you can. You should drain the milk totally out of your breasts. The more the milk is drained out, then more the milk will be produced. After each session of breastfeeding, you should continue to breast pump for another 5-10 minutes. This will help increase the milk supply.

With proper stimulation, few weeks into breastfeeding, the milk supply is usually higher than the demand. Therefore, you will find that your breasts usually become full even if you just breastfeed half an hour ago. You need to relieve the engorgement. You need to relieve the pain or else it could lead you to get ill. Moreover, the production of milk will slow down. Instead, take this opportunity to start building milk stock.

If your baby does not know how to latch on properly, then you have to give her time. Meanwhile, use the breast pump to help with the stimulation. The milk production will continue to do its work while your baby is learning to latch on properly.

Having sore nipples is one of the many reasons we need a breast pump. It is easier to use breast pump than to have your baby latched on when you nipples are so sensitive. You can control the speed and the strength of the breast pump and when you can not take it you can immediately pause or stop, but you can not do that with your baby. By expressing milk with the breast pump, you get to feed your baby with breast milk and also having your breasts stimulated continuously without the pain.

It is really important that your find the right breast pump that suits you and your purpose. It is going to be your best friend for a period of time. There is no wrong or right choice. You just have to find the most suitable one for you. The Medela Pump Backpack is one stylish breast pump that I think it is worth looking at. Everything is ready inside that backpack. You are basically ready on a go.

medela breast pump and accessories

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article by k.patria

eccentric screw pump-Hydraulic Pumps - Its Various Types and Operating Specifications

2009-11-14T02:08:00.000-08:00

Hydraulic pumps are essential tools in order to pump fluid into the pump's own outlet. They source out their power from mechanical forces and are capable of rotating and acting like a motor. In order to get the best type of thispump, it is essential to look into how it operates at the same time check into the features it possesses.

Hydraulic pumps are subcategorized according to type and operating specifications. As to the type, it can be an axial or radial piston, an internal or external gear or avane . As to operating specifications, it includes continuing and maximum operating pressures as well as operating speed, horsepower and temperature. At times, it may also be maximum fluid flow and viscosity andpump weight. Below are explanations on the types and operating specifications of a hydraulic pump.

The different types

The axial piston type of hydraulic pump is termed as such because it makes use of the so-called axially-mounted piston. This is a crucial part in pressurizing fluid. The process happens after the mechanical energy is utilized to power up the piston. The piston then passes through the chambers of thepump and becomes responsible in pressurizing the fluid.

For the radial piston hydraulic pump, radially-mounted pistons are used. In this type, an alternate motor may also be used to operate multiple pistons. The power source is responsible in making the pistons move and pressurize the fluid.

Other types of pumps in this industrial product may further be explained from the name given to each category. For instance, the internal gearpump makes use of internal gears while the external gear pump makes use of external gears. As for the vane pump, it is obvious that a vane is used in the process.

The various operating specifications

The continuous operating pressure for hydraulic pumps is described as the maximum amount of pressure that provides proper functioning to thepump . The maximum operating pressure, on the other hand, is also capable of providing the maximum amount of pressure to the outlet but only at an intermittent basis.

Other operating specifications for hydraulic pumps include operating speed, horsepower and temperature. Looking at the pump's operating speed, this operating specification is defined as the number of revolutions (rotations of the moving parts) made by the pump per minute.

The horsepower is computed depending upon the fluid's flow and pressure. Operating temperature is also vital in the sense that it indicates the temperature variations that the pump is capable of withstanding.

article outsource Richard C.Milton

eccentric screw pump-Barrel Pumps

2009-09-04T00:47:00.000-07:00

There are a number of different types of barrel pumps available from retailers, and all serve slightly different purposes. 55 Gallon barrels are fantastically useful when it comes to storing liquids, but when you want to get the fluid out, the weight of the barrel and its contents makes it impossible to pour, and so, a pump is required.

The anatomy of a barrel pump is fairly straightforward. Typically, the unit fastens on to the opening at the top of the drum, screwing into place for added stability. A pipe attached to the pump reaches to the very bottom of the barrel in order to draw liquid from the very deepest part first.

The simplest form of barrel pump that you can choose is a standard piston pump. These are ideal for lightweight liquids and although they do require a great deal of effort in use, their relative simplicity means that they do not need a great deal of maintenance, and are able to offer long term and reliable service throughout their lifetime.

For a slightly more viscous liquid, a more powerful pump system is required, and there are a number of different options available. One of the most straightforward is the evolution of the piston pump. By adding a lever to the top of the piston, engineers have been able to provide additional power and make it easier to get the liquid out of the barrel more effectively. Of course the drawback with this kind of barrel pump is the fact that the flow of the liquid is uneven, and care needs to be taken by the operator not to spill excessive amounts of liquid on the floor and surrounding area.

In order to bypass the dual problems of uneven flow and spillage, there are two main options available. The first is the rotary pump. With this type of barrel pump, turning a handle draws liquid up from the bottom of the barrel and allows for the operator to enjoy a consistent and even flow of liquid into their alternative container. This even flow means that there is less risk of liquid splashing out onto the floor, where it will be wasted, or could create a hazard for people slipping over.

An alternative to the regular manual rotary pump is the electric barrel pump. Rather than having to manually pump the system in order to get liquid from one container to another, a motor powered by either a battery or mains power supply is used in place of human power. This produces a good even flow of liquid from the barrel at the push of a button, and means that an exactly controlled amount of liquid can be dispensed in order to avoid any wastage, and driving down business costs in the long run.

Having individual barrel pumps available for all the different types of liquid that you store is an essential part of maintaining all materials in the best possible condition. If a solvent or water based liquid is allows to stand in a pipe or barrel pump that is then used for an oil, it will contaminate it, and this could lead to problems at a later date, such as in an engine where water in the oil can cause the lubricated areas to corrode and very expensive damage to delicate parts of the engine to be caused

By Camille Howe

eccentric screw pump:servicing boats fuel systems

2009-08-12T08:33:00.000-07:00

Regular engine servicing is essential for all boat owners, and winter is the ideal time to prepare your boat for summer 2009.

Checking and replacing the primary filter Clean filters are essential to keep water and particles out of your boats engine. Most marine engines have two filters, the primary filter in the fuel lines between the tank and the engine, and the secondary filter between the fuel liftpump and the injection pump.

You should check regularly throughout the season for collected water. It will be clearly visible and will require occasional draining. To drain the filter bowl, hold a container underneath the open cock. Once any water has passed through you will see a stream of clear fuel.

Replacing the filter is recommended at 200 hour intervals. Remember to close the fuel stopcock to prevent fuel from draining from the tank. Diesel can be messy and its best contained. Place a bowl below to catch any escapes or try hanging a plastic bag around the filter.

Check the seal between the bracket, canister and bowl. They won't need replacing every time but as new filters come with seals you may still want to. To fit the filter, reverse the process. Assemble the base plate, bowl and filter as a single stack before inserting the bolt. A smear of oil on the sealing rings of fuel and oil filters help them to bed in smoothly when tightened.Filling the primary filter with the lift pump can be tedious. Even if you have a dip pipe fuel system you can sometimes shortcut the process by opening the filter's bleed screw and blowing down the fuel tank breather pipe to lightly pressurize the tank and drive fuel into the filter.

Replacing the secondary filter The secondary filter is usually one of two types - a spin-on filter, similar to car oil filters, or a type similar to the primary filter as described above. To replace a spin-on filter, unscrew the filter with a wrench, place a plastic bag around the filter and unscrew it allowing the fuel to drain into the bag.

Bleeding the system Changing the fuel filters allows air into the pipes. For the engine to run properly this must be bled by driving it out under slight pressure from high points in the fuel system. Some engines are self-bleeding, but most require you to carry out a few simple steps.

Firstly, make sure you have plenty of fuel and that all the valves are open. Try to operate the left pump lever - if it won't move, hand turn the engine half a revolution to move the drive cam, then try again. If your primary filter is below the level of fuel in the tank, and your fuel is drawn directly from your bottom of the tank rather than via a dip pipe, you can fill the primary filter simply by cracking open the bleed screw on the top. You should see the bowl fill with fuel, and once clean, bubble-free fuel starts to starts to flow from around the bleed screw . There may still be air on the downstream side of the filter which will need to be vented using the method described below, but having already filled the primary filter accelerates the bleeding process.

In either case, the next stage is the secondary filter. Open the bleed screw and operate the lift pump. This may take several minutes, especially if you have to fill the primary filter this way. Fuel should start appearing around the bleedscrew, once this is free of bubbles you can close the screw.

If you're looking to buy a boat, check out the listings on sailing-boats-for-sale.com. There are thousands of sailing boats for sale ranging from sailing dinghies to sailing yachts. If you have a sailing boat you want to sell, you can also sell it on sailing boats for sale and avoid expensive brokerage fees.

By Simon White

eccentric screw pump:Baseboard Radiator Heat Failures

2009-08-08T08:27:00.000-07:00

While it does not happen regularly, you might find that your baseboard radiator heat system could experience pump failure. There are a number of pumps in the system, so the likelihood of one of them eventually failing is great. So, how would you know which pump it is? When a pump fails it is usually not the whole pump, normally the bearings in the pump fail and the pump becomes noisy. So, if your pump starts making lots of noise you could probably assume the bearings are beginning to fail, and need to be replaced. Replacement is usually a fairly simple task since most systems have isolation valves on both sides of the pump so that it can be removed with little loss of water from the system.

fuel pump baseboard baseboard heater

baseboard radiator

Another relatively simple pump problem that could cause pump failure is that pump seals also develop leaks. This is not common, but it is a possibility. If this occurs you need to reseal the pump.
Another possible problem with your baseboard radiator heat system could be boiler failure. This is similar to a water heater failure; the boiler can also develop leaks, so if your boiler seems to be a problem check for the heating element first, and then for leaks. The likelihood of a heating failure is slim, water heaters fail much more often, but in a baseboard radiator heat system the water generally enclosed and is not replenished on a regular basis, therefore, there is not a significant build-up of calcium in the tank as there is in your hot water tank which continually brings calcium into the water heater. That calcium which your system brings in will settle in the bottom of a water heater and causes hot spots and eventual failure of the water tank, this is not usually the case with the baseboard radiator heating system's tank.
Another problem you might incur, and often comes as a result of decorating are leaks in the system. Sometimes when people decorate they nail or screw things into the walls, and if the contractor did not protect your system well, you may puncture some of the pipes. If you have a leak in your system it is normally obvious because you will see wet floors or carpets underneath the baseboard units.
Other problems include air being trapped in the system, this causes a gurgling sound in the system when the circulator is pumping water. If you hear this noise do not worry too much, often times systems have a small valve, much like a tire valve, at the high points in the system; this valve can be "bled" until all the air is removed and water starts flowing from the valve.

radiator+water+baseboard

Problems like the overpressure valve blowing off can be caused by the air being removed from the expansion tank, but are not a normal failures. This really can't happen, or won't happen unless there is a leak at the top of the expansion tank. If this problem does occur however, the leak must be repaired and the system drained until the air is replaced in the expansion tank.
The radiator units in the baseboard radiator systems are typically made up of copper tubes with fine sheet metal fins attached. Occasionally these fins get clogged by dust and the only way to take care of the problem is to clean the tubes with a vacuum cleaner.
Really, a baseboard heating system is a great idea and you won't likely run into many or any of the above problems. They are a great option, but one of the major shortfalls of a baseboard heating system is that there is no way to install central air conditioning systems, air filtering system or whole house humidifiers. The really good things is that they are quiet, and clean because they don't blow air all over the house

HomeBuildingRemodeling.com is your source for top quality home building, remodeling and home decorating information. For free articles delivered daily by email, visit HomeBuildingRemodeling.com and enter your name and email under the Free Home Building and Remodeling Updates section.

By Dale calderwood

eccentric screw pump: Skimmer and pump service for swimming pool

2009-08-05T08:20:00.000-07:00

The information you are about to read is from years of experience. If you follow these steps, you will accomplish a safe and worry free, pool closing.

The first thing you want to do is test the water and make sure all levels including pH are normal. Next you're going to want to shock your pool, and then run the filter for 24 hours. Now it's time to start closing your pool, clean out any leaves or debris and vacuum your pool thoroughly. Now you want to pour in the contents of your closing kit.

The next step will be to blow out lines or evacuate any water that might be in the lines. You can do this without emptying pool. You will need either a shop-vac or a compressor. With a compressor, you will take an old winterizing plug and remove the center screw then push a quarter inch compressor hose male adapter in the center of the winterizing plug. A # 9 plug is most efficient. You can now use this in any of the plumbing on the filter. The first way to blow lines out leave all the plugs in the filter and the pump , set the multi-port valve on filter, and close all of the plumbing line valves except for the line you wish to blow out. Open the air release on top of the filter and push the winterizing plug with the compressor line and pump air into the filter.
This will push all the water out of the filter and push the water out of the line. Once you see air bubbles install the winterizing plug, do this for the skimmer and returns. Open just the main drain valve force air into the line until you see air bubbles. Then immediately close the valve this will hold air in that line and prevent water from rushing back in. If you have step jets simply open the air vents, remove the jet and plug up the fitting. Then open up the jet valve at the filter, then force air this will push all of the water out of the air vents once the water is stops coming out remove the compressor close the air vents and you're now done with blowing your lines out. Check all plugs for air bubbles.

Now you must remove to plugs in the pump remove the winterizing plug at the bottom of the filter. If you have a chlorinator, you must remove any plugs or remove the chlorinator itself. Make absolutely sure that you shake out any water that may be trapped inside the chlorinator. Set the multi-port valve in between any two selections this will hold the valve open and prevent internal damage.

Do not cover the pump for the winter. It is important that the pump to be able to breathe you do not want the inside of the pump to oxidize. If you have a heater make sure you turn off the gas, turn the gas valve off and remove the winterizing plug under the manifold. It is a good idea to cover the heater. Heater covers are available in our online catalog. This will prevent acorns and any other debris to get inside of the heater, and possibly cause a fire on start up.

Should you choose to use a vacuum to clear the plumbing lines, the easiest way to do that would be to get your-self a couple of pieces of schedule 40 PVC pipe, count how many returns you have and that is how many 1 1/2" 90A streets you will need. Count how many skimmers you have, and that is how many 1 1/2" male adapter's your need.
For the skimmers measure how many inches it is from the bottom the skimmer to the top of the water, and add 2". Cut a piece of PVC at that measurement, glue the male adapter to the PVC, wrap the threads with Teflon tape and screw it in the suction whole at the bottom of the skimmer. You may also use our blow out gizmo. Make sure you use Teflon tape on the threads. This will allow you to blow out the skimmer, and it will act as a baffle to prevent the skimmer from cracking if it freezes. Now measure the return holes to top of the water and add 2 inches. Cut the PVC at this length glue the 90A streets wrap the threads in Teflon tape, and screw this in the returns, make sure the pipe is sticking out of the water. Now you can winterized the plumbing, open all the valves go over to these pieces of pipe turn your vacuum on and suck all the water and lines. After the water is out of the lines use a number eight winterizing plug in the PVC and tighten.

Open the pump trapped put the vacuum hose in the opening open the main drain valve. Reverse the vacuum and blow air into this line. You may not see air coming-out of the main drain, but let it go for 30 seconds and then shut the valves. This will push any water below the freeze level and prevent freezing. (Note some concrete in-ground pools may have to be evacuated or blown out by a compressor). If you have a problem removing any plugs or you notice places were water may end up laying it is advisable to buy our any freeze. Just for this anywhere there may be a problem. If you use the PVC in the skimmer, you must take a quart bottle, such as an empty algaecide bottle. Fill it halfway with small stones install the cap turned upside down and put it in the skimmer. This will prevent the skimmer from cracking when it freezes.

To remove handrails and ladders, simply lift the decorative cover, loosen the bolt approximately a quarter inch up and then hammer it down. This will free your ladder or handrail. Then simply lift it out of the cup. If you have a vinyl pool, do not empty it below the skimmer keep the water level as you would in the summer. This will prevent the liner from shrinking in the corners and shortening the life of the liner. There is no reason to lower a vinyl pool. Vinyl manufactures will not cover warranties on pools that have been lowered. If you have a concrete pool, you must lower the pool, at least 1 foot below the skimmer. This will prevent the bond beam from cracking causing the tiles and coping to fall off. Now you're about ready to put the cover on.

For water tube type covers, fill all the water tubes only three quarters of the way, install the cover and place the water tubes on the cover around the perimeter of the pool. Make sure there's enough water tubes used that they are touching. It is not advisable to put the water tubes in the cover loops. Should the cover blow in during the winter, if the tubes are attached to the cover this will drag the cover down making it almost impossible to reinstall the cover with the water tubes.

If you have a safety cover raise all of the brass anchors install the safety cover as you normally would. If there are any loose straps, you should tighten them.

For water tube covers place the cover pump in the center and pump the cover off when ever it rains. Do not pump the cover, when the water is frozen, this will damage the pump. If you have a safety cover and a vinyl pool, install a cover pump in the skimmer. This will prevent the water from being pumped out too much and allows you easy access.

For concrete pools, it is important you keep the water level below the tiles, if you have a step install a cover pump on the second tread down.

By Steve Merillat

eccentric screw pump-Pump Maintenance and Repair for Pressure Washers

2009-08-04T00:49:00.000-07:00

If you have a pressure washer business you will eventually need to change out or repair the pump. There are a few things you should know to make such change outs easy. You may also need to study up on preventative maintenance so that you do not have to worry about pump failure. Your pressure washer probably has one of two different pumps if it is industrial grade. Either a Cat Pump or a General pump ; both are industry standards. General is the leader in the industry for sales and many prefer Cat as it sucks better from plastic water tanks.

Your pump could be an eccentric screw pump is powered by two parallel belts connected to your engine. You should make sure not to starve your pump from water. When the water tank is empty turn off the engine. Starving a pump will burn it out in about thirty-five minutes. The manufacturer of an eccentric screw pump says five to ten minutes, but that’s not life threatening. Your pump has a safety feature whereby when you are not spraying the water, it will automatically by pass into the tank provided there is enough water for the complete loop. Thank you. We also thought it was one of our great ideas. You should change the oil in the pump every month. Make sure your pressure washer rig is on level ground and fill the pump to the red dot on the center of the eyeglass. Over filling is a really bad idea.

On your pump you will notice six large bolts. Inside of the holes are check valves with springs. After 300-500 hours you should change them. You can do this yourself. The valve kits are $60.000. It’s very easy:

Unscrew bolts

Remove old valve

Replace valve

Make sure to seat the valve evenly

Screw the bolt back in by hand

Make sure the O-ring on the bolt is snug

Tighten with wrench pretty tight

Inspecting The Pump

If you drain the oil and it’s got bubbles in it or has turned white, then you have a blown seal and water is getting into the oil because: It overheated due to water starvation; The casing cracked because of vibration; You forgot to change the oil, dummy ($600 mistake and one lost day’s work if you can get the parts that fast).

Check to see if the belts are tight. If not tighten them. Look for water drips. A slow drip on the exit side of the pump could cost you as much as 150 PSI at the nozzle. A fast drip (two to three drops per second) could be a 250-300 PSI loss at the nozzle. A steady drip stream might be a 500 plus PSI loss. When you see water leaking, fix the leak ASAP. Be sure to use ample Teflon tape when re-tightening fittings. This will stop future leaks, prevent rust and make fittings easy to separate in the future.

A hole in a hose or leak on the inlet side of the pump causes air to get in. The pump will act as if it’s starving for water. It might even pulsate. When the water level in your tank reaches a point below the leak in the hose, air will replace the water and you’ll get zero pressure. That makes it very hard to wash anything.Practically these eccentric screw pump is easy to repair as well as replacing the broken parts.

Low pressure in the pump can be caused by a number of things; these are by far the most common, but this is not a complete list, generally if you go thru this list the problem will be solved, check the easiest things first such as water supply:

Faulty pressure gauge (Replace)

Out of water (Fill up tank)

Old or worn out tip at gun nozzle (Replace)

Incorrect tip (Remove and replace)

Belt slippage (Tighten belt)

Hose leaks (Fix leaks)

Faulty unloader (Replace)

Mis-adjusted unloader (Re-adjust)

Worn packing in pump (Take it to dealer)

Inline filter clogged with dirt (Clean it)

Obstruction in spray nozzle tip (Remove it)

Chemical metering valve sucking air (Turn it off)

Slow engine rpm (Check engine)

If you have a pulsating issue at the gun or the machine is Fluctuating pressure, this is a completely different problem than low pressure. You should check for: Worn piston packing (Call dealer).Pump sucking air (Fix hole), Blockage in valve (Remove, check valves and take out blockage). If it is fluctuating and very noisy or if your pump is only noisy check for:

Air in suction line (Check water supply and connections)

Broken or weak inlet or discharge valve springs (Call dealer)

Excessive matter in valves (Check and clean if necessary)

Worn bearings (Check and replace. If necessary, call dealer)

Vibrations from mounting (Tighten it. If unable, call dealer)

If you find the presence of water in the pump oil, it could be caused by: Blown pump head seals, High humidity in air (Change oil more often) or Piston packing worn then call your dealer. If water or oil drips from the bottom of the pump this could be a number of things such as Piston packing worn, the O-ring plunger retainer is worn, Oil seal worn, Pump head seal shot or Crack in pump head. If any of these call the dealer and see if they have the parts in stock, you may be able to fix it yourself if you feel confident, if not you will need to leave your machines with the dealer for repairs.

Pump lubrication should be done every three months or 500 hours, which ever comes first. Use SAE 40 weight oil or equivalent for Cat pumps. Use 20/30 weight non-detergent oil for General pumps. It should be hydraulic oil with anti-wear and rust inhibitor additives. The oil level should be checked by looking in the window on the side of the pump. Only fill oil half way to the red dot.

By Lance Winslow

eccentric screw pump-Circulator Pump Checking and Changing

2009-08-04T00:06:00.000-07:00

circulator pump

Circulator Pumps are the heart of a hot water heating system. Without the pump circulating the water, there is no heat. The very first thing you need to know is the water temperature in the boiler. If the water is hot, 140F or above, than the problem is not the boiler. It is heating the water. The next thing will be to see if there is power coming to the circulatorpump. Either take the electrical cover off of the circulator pump motor, or check for voltage at the source of the wire going to the circulator pump . If there is no voltage, usually 110 volts for the US, then you have to look at why the motor is not getting power. I will do another article on that issue at another time

So now we have established that you have power coming to the motor. There is hot water in the boiler however the pipes going to the radiation are cold. The next thing to look for, are zone valves. They are little motorized valves that open and shut to direct the flow of heat to different parts of the house or building. It is possible that one of them could fail and the circulatorpump is running and moving no water. Usually the circulator pump will be making a noise and often be very hot if this is the case. Of course then you need to check the zone valve. That, we will also cover later.

Changing the pump is not always an easy process. I will attempt to explain some of the possibilities for changing out a circulator pump. First of all I would recommend that if you are reading this and you do not have an extra circulating pump in the basement beside the boiler. That you stop by your local heating and air conditioning supply house and buy one. For under one hundred dollars it will be cheap insurance.

If you had a responsible installer do your heating system, then you will have valves in the piping on either side of the circulatorpump. These valves will isolate the pump from the rest of the system and changing the circulator pump will be fairly painless. If you do not have valves close to the pump, then you will need to find the valves that will be the closest to either side of the pump and close them. For some older installs there may not be any valves and you will have to drain most of the water out of the system to change thepump . This can get very complicated and professional help may be needed. The hardest part may be refilling the system and getting the air purged back out of the piping.

A very important thing you need to do to before changing the circulator pump, is to make sure that the electricity to the circulator pump motor is turned off. Verify that the power is off before touching the wires. The wires then need to be disconnected at the pump motor. Then the 4 bolts that hold the circulator pump in place need to be removed. Save these bolts, they may be needed to install the new pump. Carefully remove the pump from the flanges. A pry bar or screw driver may be needed to break the pump lose from the old flanges. Be careful of the motor, depending on the type of failure, the motor can be very hot.

To install the new pump, clean the old gasket material from the flanges and install the new gaskets on the new pump. Carefully insert the new pump with gaskets into the flanges. Be careful not to damage the gaskets and pay close attention to the arrow on the side of the pump which shows the direction of the water flow. Make sure the new pump arrow is pointing in the same direction as the one you removed. Then install the 4 bolts that hold the circulator pump in place. Tighten the bolts just so they are snug and not too tight. If they leak a bit you can always make them a bit tighter to stop the leak. Too tight may damage the gaskets. Hook up the wires to the pump motor again. Open the valves back up and check for leaks. Adjust bolts as needed. Apply power to the system and start the motor to check the operation of the circulator pump. The hot water should start to flow through the pipes and radiation to deliver heat to the house.

By D.Floyd Kolb

eccentric screw pump:Window cleaning water fed pole pump box

2009-08-02T02:57:00.000-07:00

Housing your water fed pole pump in your vehicle and the advantages of a pump box.

Your water pump is a very important part of your window cleaning system. It is one of the very few moving parts, and is responsible for getting pure water from your tank in your van to the window you hope to clean.

There are two methods currently for housing your pump in your vehicle.

water fed pole system

1/ attaching the basic pump to the water tank frame, or attaching to the side panel of your vehicle.

2/ fitting your pump in a box, and then releasable securing the box to the water tank frame, or side panel of the van.

The method in 1/ above restricts the removal of the pump from the vehicle which can be a big disadvantage overnight in freezing conditions. Damage to the pump can be prevented by taking the pump indoors at night, assuring it will be ready for work next day.

The method 2 above, with a disconnection of two quick connect pipes, and the disconnection of a battery plug can be lifted off its mountings in seconds and taken indoors at nigh very easily, and the pump will be ready for work in the morning.

How do you go about setting up the pump in a box like 2/ above? Quite simply the pump is secured inside the box itself with the use of the 4 screw holes in the pump housing. Once the pump is secured inside the box then two simple brackets are fitted to the outside of the box, these brackets are used to releasable secure the pump box to the tank frame or the panels on the side of the van. Two bulkhead connectors are then fitted to the pump box, one inlet and one outlet a battery plug is also fitted for easy disconnection and reconnection of the battery. The fact that all the wiring is kept secure and tidy inside the box, resulting in less corrosion is another big advantage.

The window cleaner after his day's work can simply disconnect the inlet and outlet pipes, and disconnect the battery plug from the outside of the pump box, and take the whole thing indoors.

Some window cleaning water fed pole supply companies sell their systems with pumps supplied in boxes as standard, and some don't. If your supplier is one who doesn't, then it is an easy job to do yourself.

By Peter Fogwill-window tools

eccentric screw pump:PUMP BEARING RELIABILITY: 4 Installation Procedures to Maximize Performance by Stephanie Eldred

2009-08-02T02:32:00.000-07:00

In tough working environments, machine reliability can be difficult to maintain - especially when contaminants threaten bearings and components. NSK engineers devote their attention to the needs of bearings in the real-life applications and challenging environments in which they will be used. One such application is the impeller slurry pump - a piece of machinery that often faces frequent downtime, high maintenance costs and high levels of premature bearing failure.

In the case of one cement producer, screw pump failure due to failed bearings was resulting in high replacement, maintenance and downtime costs - something the company couldn't afford to ignore. Because screw pumps operating in a cement plant are subjected to extreme levels of cement dust and dirt, dust contamination was determined to be the ultimate cause of the bearing failures.

Impeller pumps require specific installation practices to ensure that they achieve top performance under contaminated conditions: •When the bearing assembly is not held in place by the fit between the shaft, the sleeve and the bearing, all metric bolts in the bearing assembly need to be torqued correctly and LOCKTITE must be used. This practice ensures that the bearing assembly does not spin on the shaft. If your bearing is slipping on the screw bushing and/or the screw bushing is slipping on the shaft, the bolts holding the plate that is pressing against the bearing inner ring are the wrong type, wrong torque, or both. •Bearing lubrication can have a significant impact on the operation of bearings and machinery, especially in contaminated environments.

horizontal slurry pump

For slurry pumps, a highly stable EP grease is the best option, preferably with a Bentone base, which is suitable for anti friction bearing lubrication at temperatures from 0F to +300F. •Maintenance and re lubrication are also vital to the life of bearings. For screw pumps that operate continuously, monthly re lubrication is recommended as is monthly preventative maintenance. During the re lubrication process, check the grease for oiliness and dirt contamination and adjust the re lubrication schedule accordingly. •Operating temperatures can be used as a guide for lubrication - a sustained temperature drop could indicate insufficient lubrication prior to the addition of grease, while a noticeable rise in temperature could indicate excess grease.

An application such as this demands not only correct installation and maintenance procedures, but the right product choices. To achieve the highest level of contamination resistance NSK engineers recommended the Tough Steel series, designed to resist contamination when operating in some of the harshest industrial environments. The NSK team trained the customer's staff on correct installation and maintenance, and supervised the change-out. After the switch, the company realized more than $53,000 in savings and gained valuable employee knowledge.

NSK's Asset Improvement Program (AIP) is designed to reduce costs and improve productivity through correct product choices, specialized application knowledge and expert technical support. To learn how NSK AIP can create value and maximize up time for your business, contact us today!

by Stephanie Eldred

eccentric screw pump:Industrial pump repair

2009-08-02T02:01:00.000-07:00

Industrial pumps are devices that are used to move gases or liquids with the purpose of moving the fluid or gas by a physical or mechanical action. Many think that pumps create pressure but this is not correct. It is not the pump that causes the pressure; it is by adding resistance to any flow that causes pressure. In the industrial pump market there are several different types of pumps that are used and therefore might need to be repaired. When repairs are needed it is important to use companies that have certified technicians available.

hydromatic pump

One type of industrial pump is a hydromatic pump. This is a pump regularly used in water treatment. Many waste water treatment centers use these to help them keep the water and environment cleaners. Because of the consequences that could be associated with a pump breaking down, most water treatment plants make sure their pumps are kept maintained and repaired to keep them running as efficiently as possible. Positive displacement pumps are another example of industrial pumps that are used today. These pumps cause liquid to move by trapping a set amount of liquid then displacing the volume that is caught out into a discharge pipe. There can be many different types of this kind of pump. There might be rotary types like, screw pumps or shuttle block pumps or a liquid ring vacuum pump or even a Wendelkolben pump.

There is also what is classified as a dry pit submersible pump which is specifically used in applications where the pump can be left unattended and still be relied upon to work with high performance and that resist clogging. These pumps are used top ump sewage and are generally used in waste water plants or industrial plants where solid materials are being pumped.

Businesses that have industrial pumps and motors cannot afford to have their machines broken for long periods of time. Repair companies have to be ready to step in on a minutes' notice to help analyze the problem and come up with a repair. Repair companies understand that any downtime caused by a broken pump or motor cuts into company production and throws the company off schedule. Any industrial pump repair company will understand how critical the machines are to running the business. All repair companies will have qualified technicians able to work on most any working brand pump as well as expert customer service to help and follow up on any further needs.

A quality industrial pump repair shop should be able to provide expert service and guarantee their work 100% for any makes or model pump they repair. The repair shop that works on industrial pump repairs will probably be a complete Industrial Machine repair shop. This means that they will repair motors, pumps, gearboxes, and possible circuit board hydraulics repair. It's possible they might also offer a full machine shop and panel shop for repairs to done in-house as well as preventive maintenance as in vibration analysis and calculating the condition of bearings in electric motors as well as checking that there is sufficient lubrication.

By Neil Gillespie- Industrial Pump Repair

eccentric screw pump:Pool Pumps Filters

2009-08-01T18:27:00.000-07:00

The Necessity Of Filters

Swimming pool sanitation must be maintained lest bacteria and viruses are allowed to flourish, causing the spread of pathogens and diseases between visitors. Insect larvae, algae, and bacteria can also enter the pool and be combated. This is where pool pumps filters come in, filtering out pathogens.

Sand Filters And Pump Kits

Whereas many traditional filter systems use cartridges that must be replaced every so often, sand pool pumps filters last longer and perform a more comprehensive clean of the pool, capable of handling more heavy duty work than their competitors. Sand filters and pump kits possess top mounted valves, 4-way multiport valve, 230v voltage, 2 year warranty, powerful pump with pre-filter, and blow molded tank.

H2OFun - One Of The Market Leaders

These products are designed for most domestic swimming pools and are manufactured to top grade UV stabilized and reinforced thermoplastic. They also feature a marine grade aluminum motor that is resistant to corrosion. A heavy duty cast iron shield is provided, guaranteeing longer bearing life and quieter running. H2OFun pool pumps filters weigh somewhere between 13 and 44 lbs, making them lightweight, but extraordinarily durable and robust. Whether you want to replace your current pumps or need to purchase new ones for a swimming pool you are planning to build, H2OFun offers some great products. They come with both imperial and metric fittings easily attachable to your existing pipework system. Other advantages include: low cost, self-priming, a year's warranty, reliability, and quietness.

Submersible Pumps - An Emergency Option

These are useful for those swimming pool owners who need to pump out water in an emergency. Submersible pool pumps filters comprise an electrical cable with a waterproof joint, and the entire unit is placed into the water. Some submersible units pump constantly, or floating models have timed switches fitted to them, which will stop the pumping process when the level of water drops to a certain level.

The Innovative Tagelus Pump

The Tagelus is amongst the most durable and reliable of pool pumps filters currently available on the market. It has a top-mounted design with a singular reinforced fiberglass composition. It also has a special drain and six position valve, plus a screw-in adaptor collar placed at the top of the filter. Any orientation can be achieved with collar fitting using a clamp band, which ensures that installation is convenient and fast. The Tagelus comes with a 5 year warranty which is always a welcome bonus.

The ITT AG - Above Ground Convenience

If you prefer to keep an eye on your pool pumps, then this above ground pool pump filter model might be the one for you. It is best used for small domestic or residential swimming pools. It is easy to install, runs almost silently, and is very economical in terms of energy use. The pump possesses two 2.5" BSP threaded components, supplied with 1.5" boxed unions. An integral mounting foot is also included on this above ground pool pump filter along with a fine mesh 1.8 litre strainer basket, 63 frame IP55 motor, and top-grade carbon/ceramic seal assembly.

By Adam Carter

eccentric screw pump:Madela Breast Pump

2009-07-31T11:38:00.000-07:00

There are a number of different pumps on the market but you can't go wrong with the Madela Breast Pump. There is a breast pump called the Madela Swing Breast pump which is a pump for Moms on the go. This tiny pump can fit anywhere including a purse. This is a unique breast pump and the only single electric personal use pump. It has breakthrough 2 Phase Expression Technology which is guaranteed to reduce your pumping time. It was first researched and developed for use in hospitals. The 2-Phase Expression is an advanced system. It has a pumping pattern that actually mimics a baby's natural nursing rhythms.
madela breast pump

This pump is designed for faster let-down and faster milk flow. It has a massaging Soft Fit breast shield and an adjustable vacuum and speed for customized comfort. This unit is portable and can be used on a table. It also comes with a belt clip and shoulder/neck strap. It is safe for milk collection, storage and feeding of the milk itself. This product is designed for you and your baby so all the parts that come in contact with the breast milk are BPA/DEHP free. It gives you more milk than other products on the market from consumer reports. The speed and suction are completely adjustable. There are only 4 buttons to operate the entirepump which makes it so simple to use.

This pump is easy to put together but remember to thoroughly wash all the parts first. All you have to do is connect the valve; membrane and breast shield together thenscrew it on the bottle. Then you attach one end to the pump and the other to the breast shield. Then just put the shield over your nipple and press the power button. The pump will go into its two phase mode which is completely adjustable for your comfort. The stimulation phase should last for around 2 minutes and then it will switch to the expression phase. It comes with the neck strap which you can hang around your neck and the clip if you want to clip it onto your belt. So you can have complete freedom while pumping!

This is a great little pump especially for moms who are planning to pump a couple of times per day. The Swing pump doesn't take long to use either. To pump one breast it takes around 10 mins. This will save you time and let you get back to other important tasks in your day.

This is Michelle - I'm a mother of 3 kids, all under 4 years old, and I've breastfeed them all. It wasn't easy, but I learned as I went and I realized how so many other moms either get discouraged and give up breastfeeding or never try it at all - it's a powerful and wonderful experience,and I recommend every mother tries it. Sometimes, the right breastpump can help you, too.
http://www.trusted-breast-pumps.com

A bonus article.

eccentric screw pump:Boat Fuel System Maintenance

2009-07-31T11:34:00.000-07:00

Replacing the filter is recommended at 200 hour intervals. Remember to close the fuel stopcock to prevent fuel from draining from the tank. Diesel can be messy and its best contained. Place a bowl below to catch any escapes or try hanging a plastic bag around the filter.

Checking and replacing the primary filter Clean filters are essential to keep water and particles out of your boats engine. Most marine engines have two filters, the primary filter in the fuel lines between the tank and the engine, and the secondary filter between the fuel lift pump and the injection pump.

lift pump
boat pump impeller

You should check regularly throughout the season for collected water. It will be clearly visible and will require occasional draining. To drain the filter bowl, hold a container underneath the open cock. Once any water has passed through you will see a stream of clear fuel.

Check the seal between the bracket, canister and bowl. They won't need replacing every time but as new filters come with seals you may still want to. To fit the filter, reverse the process. Assemble the base plate, bowl and filter as a single stack before inserting the bolt. A smear of oil on the sealing rings of fuel and oil filters help them to bed in smoothly when tightened.

Filling the primary filter with the lift pump can be tedious. Even if you have a dip pipe fuel system you can sometimes shortcut the process by opening the filter's bleed screw and blowing down the fuel tank breather pipe to lightly pressurize the tank and drive fuel into the filter.

Replacing the secondary filter The secondary filter is usually one of two types - a spin-on filter, similar to car oil filters, or a type similar to the primary filter as described above. To replace a spin-on filter, unscrew the filter with a wrench, place a plastic bag around the filter and unscrew it allowing the fuel to drain into the bag.

Bleeding the system Changing the fuel filters allows air into the pipes. For the engine to run properly this must be bled by driving it out under slight pressure from high points in the fuel system. Some engines are self-bleeding, but most require you to carry out a few simple steps.

Firstly, make sure you have plenty of fuel and that all the valves are open. Try to operate the left pump lever - if it won't move, hand turn the engine half a revolution to move the drive cam, then try again. If your primary filter is below the level of fuel in the tank, and your fuel is drawn directly from your bottom of the tank rather than via a dip pipe, you can fill the primary filter simply by cracking open the bleed screw on the top. You should see the bowl fill with fuel, and once clean, bubble-free fuel starts to starts to flow from around the bleed screw . There may still be air on the downstream side of the filter which will need to be vented using the method described below, but having already filled the primary filter accelerates the bleeding process.

In either case, the next stage is the secondary filter. Open the bleed screw and operate the lift pump. This may take several minutes, especially if you have to fill the primary filter this way. Fuel should start appearing around the bleed screw, once this is free of bubbles you can close the screw.

If you're looking to buy a boat, check out the listings on sailing-boats-for-sale.com. There are thousands of sailing boats for sale ranging from sailing dinghies to sailing yachts. If you have a sailing boat you want to sell, you can also sell it on sailing boats for sale and avoid expensive brokerage fees.

eccentric screw pump:Pond Skimmers Offer Mechanical Filtration- no more adjust pump and filtering

2009-07-31T11:11:00.000-07:00

Do you have a big backyard water garden? If this is the case, you do not want to have to wade out into the middle of the pond every time you want to adjust your pump or to clean your mechanical filter. That's why pond skimmers are recommended for larger water gardens (over 1000 gallons in volume).

pond skimmer

pond pump

The purpose of a pond skimmer is to remove leaves, twigs, and other debris that would normally accumulate on the surface of the pond, or inside your mechanical filter in the middle of the pond. A pond skimmer not only provides a filter basket and a secondary mechanical filtration mat, but pond skimmers also provide housing for your pump . Since a pond skimmer is conveniently located beside your pond, you will never have to wade into the middle of your pond to adjust your pump or clean your filter.

An example of a pond skimmer is Algreen's 5000 gallon unit. Unlike other pond skimmers, Algreen's pond skimmer is quite sizable and measures 22" x 22" x 16". They also include both a trap basket, fish-friendly silicone, nets and bolts assembly, and a lifetime manufacturer's warranty on the enclosure.

Pond skimmer installation can be quite straightforward. As an example, the instruction sheet for Algreen's Pond Skimmer is shown below.

Pond Skimmer Installation- How to Install Algreen's Pond Skimmer

Dig a hole adjacent to the pond and slightly larger than the pond skimmer box. Make sure the bottom of the skimmer hole is compacted and level. Place the skimmer into the hole and backfill. Level the skimmer box from front to back and side to side. When you're finished the normal water level is ¾" to 1 ½" below the top of the weir opening.
Connect the pond skimmer to the pond liner. Hold the liner up against the skimmer opening allowing approximately 1" extension above the top of the skimmer box. Allow a little slack liner below the weir opening (the pond liner will settle a little after you have completed installation). Mark the perimeter of the weir opening and then cut out a hole ¼" smaller then the weir opening.
Reassemble the weir onto the skimmer box with the pond liner (purchased separately) sandwiched between the weir assembly and skimmer box. Locate the top two corner mounting holes. Using an awl or nail carefully punch holes through the pre-drilled weir plate and liner where the mounting screws are located. Insert the blackened screws and check alignment. The pond liner should fit comfortably.
Disassemble and apply the fish-safe silicone sealant provided to the pond skimmer box around the weir opening and the screw holes. Reassemble. Punch the remaining holes through the liner. Insert screws and tighten nuts in the following order -- 1. Top two corners, 2. Bottom two corners, 3. Remaining holes.
Take the two barb-head fittings that are provided and tightly screw them into the bulkhead fitting in the back of the skimmer. To connect a waterfall pump (purchase separately) you place the pump in the back of the skimmer behind the basket and filter mat. Using non-kink tubing and clamps (purchase separately) connect the tubing to the barb-head fitting and secure with a clamp.
With the flat plastic lid that is provided you may wish to use landscape materials to blend it into the surrounding features.

Go to our online store for more information about Algreen's pond skimmer. For more pond construction tips, go to GardenSM.com.

eccentric screw pump:Examining Multi-Spindle Screw Machines(steel piston,pump shaft ,etc)and Their Uses

2009-07-31T10:53:00.000-07:00

Multi spindle screw machines are used in the world of metalworking, and often are needed in order to help manufacturers produce a high volume of components. When it comes down to it, a screw machine is a type of lathe. Lathes are utilized in order to shape such materials as metal or wood, and make a final product that can be marketed and distributed for use. The machine holds the material, while spinning and rotating it manipulating its shape. The material is turned on a horizontal axis. It is during this time when it is shaped by another, separate fixed tool or device. It is easy to note the symmetry, and manipulating it gives you the desired final product.

3 spindle screw pump

As the spinning of a lathe occurs during production, a number of tasks may be performed by the operator to manipulate the final good. A machinist can start sanding the object or cutting it, knurling it or drilling it. However it should be noted, a multi spindle screw machine is more specialized than a lathe when it comes to the production of small, individualized parts. Some machines are useful for creating larger, thicker items like an automatic lathe. On the other hand, all screw equipment including multi spindle varieties, have a limited practice space of three and a half inches. The name is a bit misleading when it comes to this technology. They are most often used in order to manufacture such items are precise turned parts, not just screw parts. Some examples of precision turned parts include spindles, shafts, steel pistons, charge pump shafts, pins, studs, tips, washers and brass slippers.

The fact of the matter is, in most instances, they are utilized in order to create small pieces which are not screws. As a point of interest, many of these pieces are not even threaded. It was originally in the conception of the mechanism that it was utilized to create screws. However, since its creation the use for making them has become quite antiquated. Nonetheless, the name was more sticking than the use of the machine.

Today, all of these machine types are automated. This has been the case since the Industrial Revolution during the 1870s, which is when many apparatuses became automated. During the 1950s, manipulation from a computer was implemented. This is just one way in which screw equipment have changed over the years, from creating screws to creating small components and parts for other larger projects and designs. There are many variations to consider depending on the type of final product you wish to make. Some are single spindle, horizontal turret or vertical turret, while others have multiple spindles.

The machineries main objective is to create a large volume of the items which are needed. Lathes traditionally only have one spindle, or one area of rotation which is used to spin the material. Other machinery was developed to have many areas of rotation. Each spindle holds a bar of the material which is to be manipulated. When the apparatus is turned on, all of the bars of material are machined and rotated at the same exact time. Depending on the model being considered, there are variations extending from two spindles to as many as eight. However, it is important to note that the most common design have six spindles.

It is without argument that most people agree, multi spindle screw machines are essential to our manufacturing industry. Whether you are a bat distributor, or a steel piston manufacturer, you will always know that this piece of machinery is what holds your business together. Arguably, these are one of the most practical machines of the modern day.

Andy West is a writer for Wickman, a proven manufacturer of the world's best machinery tool products from multi spindle screw machines to lathes. For more information please visit Wickman-Group.com.

eccentric screw pump:Sump Pump Installation

2009-07-31T03:32:00.000-07:00

According to recent surveys, over 85% of all homes with basements will experience some form of wet basement problems in their lifetime. Installing a sump pump in the basement can be a great benefit, even if it’s only to keep the water from getting deep or to act as a floor drain.

What To Buy

Sump pumps are generally sold according to the horsepower rating of the pump motor. You will see ¼ horsepower, 1/3 horsepower and ½ horsepower pumps available. Although the horsepower of the pump is a good “yardstick” to use in judging which size pump to buy, a more accurate way is to look at the GPH or, Gallons Per Hour that the unit is capable of pumping. For instance, you will find ½ horsepower sump pumps that can pump 3,000 gallons per hour and you will also see other ½ horsepower pumps that are capable of pumping over 7,500 gallons per hour. As you can see, horsepower ratings are not very accurate in judging which size pump to buy. Generally, I like to buy a larger pump than necessary because it will usually last a lot longer because it doesn’t have to work so hard.

Choose a pump with a reliable switch. The switch is very important because it tells the pump when to turn on and when to turn off. There are several types of switches available on pumps. Some of the different types of switches you will find are called; “2 pole switch”, “mercury switch” and “diaphragm switch”. I only buy pumps that have a 2 pole switch. They have proven to be the most reliable over time. After all, what good is a sump pump if it won’t turn on?

Sump Wells

A sump well is the container below floor level in which the pump is installed. You will be able to buy a 20 gallon to 30 gallon sump well at you local home improvement store, in the plumbing section. Many people opt for a smaller 5 gallon bucket; don’t do it! Your pump will burn out very quickly because it is turning on and off too much, because it can only pump out small quantities of water each time it runs.

Installation

You will need to rent an electric jackhammer to break a hole in your basement concrete floor. Ask for a shovel bit when you rent the jackhammer. The shovel bit will make quick work of digging out the hole in which you will install your sump well. The lip of the well that holds the sump well lid should be installed slightly lower than the basement floor surface. This will allow your sump well and pump to act as a very good floor drain in case of a broken water pipe, leaky hot water tank, etc. You will need to buy a bag of sand mix cement to re-cement the floor area around the sump well and the broken concrete.

Most pumps come with a 1 ¼”threaded connection for PVC pipe. Get an adapter that converts it to 1 ½” schedule 40 pipe. 1 ½” schedule 40 pipe is more universal and a lot easier to find fittings for. Next, you’ll want to attach a check valve to your piping. The check valve prevents water already pumped up through the plumbing from draining back down into the sump well when the pump shuts off. These are easily attached with a rubber boots and a screw driver.

Make sure to use pipe cleaner before gluing your pipe fittings together. The pipe cleaner actually softens the plastic and allows the pipe glue to bond better. Check with the instructions on the glue can about how long to wait before pumping water through the newly glued connections.

Plug your sump pump directly into a grounded electrical outlet. Don’t use an extension cord because it will shorten the life of your pump. The electrical outlet should be on a breaker which is the proper size for your pump. Your electrical outlet should also be on it’s own dedicated circuit breaker to prevent other electrical connections from overloading your breaker.

article by Robert Clarke

eccentric screw pump:Different Types of Devices For Vacuum Pumps

2009-07-30T20:58:00.000-07:00

When considering a vacuum pump there are several different things to consider. One of the things that you will want to consider is the type of device that runs your vacuum pump. As with everything there are pros and cons. Let's take a look at some of the different devices you can choose from to run your vacuum pump.

One of the devices is an ejector. This is one of the simplest and commonly used as a vacuum producer. The basic process of the ejector is that it converts pressure energy of a motive fluid into velocity energy as it flows through a usual small nozzle. Ejectors use many different types of motive fluid. Steam is one of the most common fluids. Some of the pros of an ejector for a vacuum pump are:

1. It is a simple design

2. It has no moving parts which makes it so that there is not much wear

3. Has the option of being fabricated from any type of metal. It can even be fabricated of various types of plastics.

4. Using an ejector for a vacuum pump tends to be one of the least expensive ways to make a vacuum device

5. Can offer the largest throughput capacity of any type of vacuum producing device

6. It is easy to startup or shutdown the vacuum pump. There is no special way to do it so it is easy for anyone.

7. Due to not having moving parts and being a simple design it is easy to repair and very low maintenance.

All of these things sound great, but there are some disadvantages for an ejector as a device for a vacuum pump. Some of those disadvantages are:

1. There is a requirement for the pressurized motive fluid

2. It is inevitable that contamination of the motive fluid will happen

3. It can be noisy

4. With the noise it could require discharge silencers or sound insulation

5. Most of the time there is a need for a cooling liquid source

Another option for a vacuum pump device is a liquid ring pump. This vacuum pump device is a multi-bladed impeller with a shaft that is mounted so that it can be an eccentric to the ring of liquid. Basically, as the blades rotate toward the discharge side of the pump the pockets decrease in size and the evacuated gas is compressed, enabling its discharge.

Some of the advantages of a liquid ring pump for a vacuum pump are:

1. Simpler design than most vacuum pumps

2. It employs only one rotating assembly

3. It can be constructed from any castable metal

4. It has minimal noise and vibration

5. It has very little increase in the temperature of the discharged gas

6. Can handle condensable loads

7. There is no damage from liquid or small particulates entrained in the process fluid

8. The maintenance is very simple compared to other vacuum pumps

9. If the pump needs to be rebuilt it is simple

10. It has a slow rotational speed which gives it a longer operating life

11. Can easily be started and stopped over and over

12. Can use any type of liquid for the sealant fluid

Like everything, there are cons to the liquid ring pump. Here are some of the cons:

1. It is inevitable that there will be a mixing of the evacuated gas with the sealing fluid

2. High power requirement in order to form and maintain the liquid ring

3. Due to the high power requirement it results in a larger motor than for other types of vacuum pumps

4. There is a risk of cavitation. This means that it requires a portion of the process load to be noncondensable under the pump operating conditions.

5. The achievable vacuum is limited by the vapor pressure of a sealant fluid at the operating temperature.

Another option for a vacuum pump is a dry pump. A dry pump doesn't need any working fluids. There are three different types of vacuum pumps available. They are: hook and claw, screw and lobe types. These types of vacuum pumps work by two different types of mechanisms. There is either volumetric reduction or the mixing of lower-pressure gas with higher-pressure discharge gas. With a dry pump it normally runs hot, because there is no liquid to absorb the heat of compression.

Some of the advantages for a dry-running pump are:

1. No contamination of evacuated gas which allows for the gas to be recovered readily

2. The pump can be built of standard, inexpensive cast iron. This is the case due to the lack of condensation.

3. It can discharge to the atmosphere

Some of the disadvantages of a dry running vacuum pump are:

1. Cannot handle particulates

2. Cannot handle large amounts of liquid

3. Might require a silencer

4. Due to it running hot it can discharge gases at high temperatures. Sometimes the temperatures can run as high as 600 degrees.

5. Most case it can be difficult to repair or rebuild

6. Due to the high temperatures it might require a gas purge for cooling to protect the bearings and seals from the process gas

Another option for a vacuum pump is a once through oil pump. It is commonly known as OTO for short. It is a vacuum pump that is a sliding vane type that uses once through oil to seal clearances and lubricate moving parts.

Some of the positives of an OTO vacuum pump are:

1. Can handle acidic or otherwise corrosive vapors

2. Can be built of cast iron

3. Has minimal vibration

4. Can handle high inlet temperature

Some of the negatives of an OTO vacuum pump are:

1. Requires the use of immediately removing the liquids to prevent liquid from hitting the vanes.

2. There can be contamination of the discharged process gas by the oil

3. Cannot handle particulates

4. It can be costly to repair or rebuild

There is one other option for a vacuum pump device and that is a rotary piston model. The piston is attached to a cam that is mounted to the main bore of the pump cylinder.

There are several different pros to a rotary piston model:

1. Minimal vibration due to it having a balanced configuration

2. It has a rugged design so that it lends to a long life

3. Can handle small particulates

Some of the cons to a rotary piston vacuum pump model are:

1. Cannot handle liquids

2. The condensable vapors are not easily handled

3. The discharged gas is contaminated with oil

4. Some of the designs can be noisy

With all of this information in mind you will want to weigh out the options and the specifics you are looking for that best meets your needs.

United Vacuum (http://www.unitedvacuum.com/) specializes in the manufacturing, and remanufacturing of industrial rotary piston pumps and rotary lobe blowers. Whether you require a new or remanufactured pump, United Vacuum is positioned to accommodate your needs. Many years of experience within the vacuum industry is available to you if you have process related pump questions or are looking to upgrade an existing system.

article by Billings Farnsworth

eccentric screw pump:Busch Vacuum Pump is One of the Best Options

2009-07-30T20:56:00.000-07:00

If you are planning to buy vacuum pumps, Busch is the right choice for this purpose. Busch vacuum pump has been in demand for a long time. They manufacture and design high-quality vacuum pumps that are used in many industries throughout the world.

Busch is registered with ISO 9001-2000 and has always been committed to high-quality or performance vacuum products, customer satisfaction, and prompt after-sales service. The first design of Busch vacuum pump came into existence in 1963 and was designed by Dr. Karl Busch for the meat packaging industry. Since then, it has been a favorite of many industries. Now, it has become a worldwide leader in vacuum technology with 30 companies and four manufacturing plants worldwide.

Busch provides product for every application, whether it is single pump or a complete system. You can choose product by its working range. These products include Huckepack Series-Once Through Lubricated Rotary Vane Vacuum Pumps, Fossa Series-Scroll Vacuum Pumps, and Cobra Series-Dry Screw Vacuum Pumps etc.

With double-stage compression, Huckepack pumps are supposed to be the powerful and strong fresh oil lubricated rotary vane vacuum pumps. This pump is usually used to handle condensable and solvent gases, due to its high water vapor tolerance. The features of these pumps are adjustable oil metering pump, low ultimate pressure achieved by two stages, proven reliability and low maintenance, and sound rotary vane technology.

The utilization of this pump is ideal for plastic industry, Chemical & Pharmaceutical, Packaging, plastic, Brick making, Metallurgy and many more.

The other vacuum pump is Fossa scroll that is ideal for high vacuum applications that are clean and dry. A non-contact and oil-free compression, low noise levels, light weight and compact size are some of the features of Fossa Scroll vacuum pumps. This vacuum pump is utilized in various industries such as Electronic, Semiconductor, laboratory and Research.

The third one is COBRA NC Series that are considered as screw vacuum pumps that work on the water and oil free compression principle. These vacuum pumps are highly compatible with liquids and water vapors and are therefore ideal for plastics, chemical, and pharmaceutical processes. High volumetric efficiency, simple robust construction, easy access to pump internals, improved cooling system, and homogenized temperature profiles are the features of the COBRA screw vacuum pumps.

Busch provides you every possible service of vacuum and compressors. A long-period experience of 40 years and the latest technology enables Busch to provide you highest possible solutions in the field of vacuum and compressors. Busch service offers scheduled service visits, 24/7 nationwide service, customer care program, technical advice, one stop lubricant shop, fixed cost service exchange and spare parts service.

Therefore, according to your industry requirement, you can choose a Busch vacuum pump that ensures high-performance and best quality.

Kip D Goldhammer owns and operates http://www.vacuumpumpexpert.com

Vacuum Pump

eccentric screw pump:Pumps

2009-07-30T20:44:00.000-07:00

Pumps are extraordinary mechanical devices that are used to move liquids or gas from one area of pressure to another area of pressure. Pumps have been in existence since the 3rd century, and are still widely used today. Pumps are used for providing water and heat and even energy! There are two main types of pumps - dynamic pumps and positive displacement pumps.

Positive displacement pumps are always preferable, because they use sealed chambers to force the liquid or gas through. This helps prevent leakages. Dynamic pumps do not have sealed chambers, but use momentum to push the liquid and gas through. The following list of pumps that we will talk about below consists of both of these types of pumps.

We will discuss some of the basic and most common pumps that are used in the industrial and residential sectors. Most of the time a pump will be made for its specific purpose.

A screw pump is also another name for a positive displacement pump. This pump is one of the most commonly used because is does not form clumps, and it pumps solids whilst keeping a constant speed.

Centrifugal pumps are made to handle large loads. These pumps are most often used for oil and chemical processing.

centrifugal pump

They have a built-in impeller that forces the liquid or gas to move into a rotary motion. This rotary motion creates the pressure.

Electromagnetic pumps are more commonly used in the industrial sector. These pumps use electrical conductors and magnetic pipes as their driving force. Electromagnetic pumps are created to move liquid potassium and sodium.

Pumps that most people will have in their own homes are centrifugal water pumps used to pump water out of swimming pools. There are even submersible pumps that are used for pumping dirty water out of pools, and then clean water back in.

Jet pumps are very powerful, and use high velocity to move fluid. Jet pumps are purely for pushing fluid. These pumps need a jet of steam or water to carry the fluid along, and the jet pressure will make a vacuum that sucks large volumes of fluid through the pipes. These kinds of pumps are so powerful that they are often used to move water from deep wells or boreholes. The oldest and most common of these pumps was the handheld type used to extract water from wells, before modern water supplies were created.

Windmills and watermills are also pumps which displace water or air for various purposes, usually to create energy.

These pumps are only a small representation of what is available on the market. However, they are the most popularly used ones. As mentioned before, pumps are used in many different environments. These can range from large industrial plants to home water systems. The way a pump operates depends mostly on what category it fits into, and what kind of pump it is. In the same breath, all pumps work under the same principle, that pressure is used to move liquids or gas. The value of pumps should never be underestimated, as they are extremely useful and necessary.

article by Sean Farrell

eccentric screw pump:Hydraulic Pumps - Fluid in Motion

2009-07-30T20:18:00.000-07:00

Hydraulic pumps convert mechanical energy and motion into hydraulic fluid power. The basic idea is very simple: force that is applied at one position is transmitted to another position using an incompressible fluid, like oil, which cannot be compressed but rather is displaced when pressure is applied.

A reservoir, a hydraulic cylinder, and a pump make up the three main parts of a hydraulic pump. Pumping hydraulic fluid from the reservoir into the bottom cavity of the cylinder causes the piston rod to be pushed up, which pushes the fluid in the other cavity back into the reservoir. This procedure pressurizes the chamber and extends the piston to its full length. Pumping hydraulic fluid into the upper chamber of the cylinder pushes the piston rod down, pushing the oil in the other chamber back into the reservoir, completing the cycle.

inside vane pump

Popular Hydraulic Pump Types

Vane pumps, piston pumps, and gear pumps are the foremost types of hydraulic pumps
Gear pumps - uses gears to pump fluid by displacement. Hydraulic gear pumps are one of the most common types of pumps. There are several advantages and disadvantages to gear pumps. The advantages are: high speed, high pressure, and quiet operation. The disadvantages are: the use of four bushings in the liquid area and fixed end clearances.
Rotary vane pumps - are positive-displacement. They include a ring mounted inside a cylindrical case. There are a number of radial slots in which sliding vanes are located. Mounted to the case is the ring and the vanes are designed to press against the inside wall of the case. Hydraulic pressure or spring force or centrifugal force as the ring is rotated will cause the vane to be forced against the wall.
Axial piston pumps - are positive displacement. There are several pistons in a circular arrangement in a cylinder block.
Radial piston pumps - a circular arrangement of hydraulic pistons, and valves which allow pressures greater than 650 Bar (~10,000 psi) to be built.
Screw pumps - positive displacement pumps. Have one or more screws that rotate to transfer high or low viscosity fluids along an axis.

This article was written by Bridget W and is sponsored by Stanley Proctor, a provider of hydraulic power units, proportional valves, and a wide variety of other hydraulic products. Depend on Stanley Proctor for all your hydraulic product needs. For more information about hydraulic products, visit http://www.stanleyproctor.com.

eccentric screw pump:A Closer Look at Hydraulic Pumps

2009-07-30T19:44:00.000-07:00

In order to drive or operate certain machinery, the hydrostatic drive system is used. This system makes use of a hydraulic fluid under pressure, making it easier to operate such mechanisms. Also known as the hydraulic power transmission, this system generally includes valves, piping, and filters to help in guiding and controlling the system. It also includes the motor part of the transmission, in which a hydraulic motor or hydraulic cylinder is seen to be able o drive the machinery. And lastly, it also includes a hydraulic pump , driven either by an electric motor, a windmill, or a combustion engine, of which would be under the generator part of the transmission.

Pumps help with the right pressure for good machinery operations. A closer look at hydraulic pumps would show us that this particular part of the whole system is indeed a critical ingredient for good use of machinery.

A hydraulic pump is the pump usually seen and used in hydraulic drive systems. This specific pump can either be hydrostatic or hydrodynamic. Hydrostatic pertains to the pressure exerted by a stationary fluid, while hydrodynamic relates to the operation by the force of liquid in motion. Hydraulic pumps are related to a positive displacement pump, which simply means that the flow is directly parallel to the displacement of the pump per revolution, plus its speed. Simple and low budget pumps or high quality pumps are used depending on the required flow and pressure, but is also related to the required life time expectancy and efficiency.

There are several types of hydraulic pumps. While most of them fall into the fixed displacement category, some can be categorized under adjustable displacement as well. Screw pump is a type of hydraulic pump that looks sort of a double Archimedes spiral, only closed. Having two screws in one body, the screw pumps are used for high flows and relatively low pressure. Usually seen on board ships, this pump has a constant pressure hydraulic system for the control of ball valves, and also for the steering gear and help drive systems. Although the efficiency is not that high, this type of hydraulic pump has the advantage of low sound levels.

inside Ge rotor pump

Another type would be Ge rotor pumps. This very special pump has more efficiency as well as the sound level, knowing that this is only a medium pressure pump.

Gear pumps are on the simple side, an economic pump that is used in simple hydraulic systems. However, the efficiency of such is not very good, especially at higher pressures. Vane pumps would be another type of hydraulic pumps where it has a higher efficiency rate as compared to gear pumps. In general, vane pumps can be used for mid pressures for up to 180 bars. There is also the axial piston pump, which has the best efficiency level among all the other pumps. These pumps can work with a pressure of up to 350 bars. Radial piston pumps, on the other hand, are used specifically for high pressure and relatively small flows.

Corazon Padol is the webmaster of MEA Incorporated. MEA Inc is a world leading organization that is composed of designers, engineers and manufacturers of valves and actuator including hydraulic actuator, gate valve, hydraulic cylinder, hydraulic control valves, electric cylinders, hydraulic power units, fccu and etc. For more information visit http://www.meaincorporated.com

eccentric screw pump:Get to know various types of pumps

2009-07-30T19:27:00.000-07:00

Pumps are amazing mechanical devices and an important invention. They are used to move gas or liquid from one pressure are to another pressure area. They are used in a variety of ways from providing water to providing heat to providing energy. Pumps have been around since the 3rd century and are still going strong today.

There are two main categories of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps have little leakage as they used sealed chambers to force the fluid or gas. Dynamic pumps use momentum to move the fluid or gas and the chambers are not sealed. In these two categories there are various types of pumps.

The following list explains the different types of pumps most commonly found in residential and industrial settings. These are a good representation of the many styles and models of pumps that are manufactured. Most pumps are made for a specific use and that is represented in this list as well.

centrifugal pump

-A centrifugal pump can handle a large load. They are used most often with oil or chemical processing. They have an impeller that forces the liquid or gas into a rotary motion. This rotary motion cause pressure to build.

electromagnetic pump

-Electromagnetic pumps are made to move liquid sodium and potassium. They are used in the cooling systems of nuclear reactors. These pumps use electrical conductors and magnetic pipes.

jet pumps

-Jet Pumps use high velocity to move fluid. They require a jet of steam or water to carry the fluid through it. The jet pressure makes a vacuum that sucks more fluid. They are so powerful that they are most often used to move water from deep wells.

submersible screw pump

-A screw pump is also called a positive displacement pump. It is a widely used pump because it does not form clumps when pumping solids and keeps a constant speed.

These four pump types only represent a portion of the pumps on the market. They are, however, the most popular models.

Pumps are found in many environments. They range from industrial plants to a home water system. The way a pump works depends largely on the category of pump it is and the type of pump it is. The use is then based on these factors. All pumps work under the same principles, though. Pumps use pressure to move liquid or gas to a different location.

article by John Francis