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Topic: Diaphragm pump

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Water pump

Progressive cavity pump

Peristaltic pump

Submersible pump

Nodding donkey

Turbopump

Hydraulic ram

Gas compressor

Archimedes screw

Pump

Pump

	Diaphragm pump - Wikipedia, the free encyclopedia
		A diaphragm pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber or teflon diaphragm and suitable non-return check valves to pump a fluid.
		In the first type, the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid.
		The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease.
	en.wikipedia.org /wiki/Diaphragm_pump (296 words)

	Pump - Wikipedia, the free encyclopedia
		The earliest pump was described by Archimedes around 300 BC and is known as the Archimedes screw pump.
		Pumps fall into two categories: positive displacement pumps, which force fluid from one sealed chamber to another with little leakage, and dynamic pumps, which use the momentum of the fluid to move it across an unsealed chamber.
		submersible pump : the fluid is moved by a pump joined to a sealed motor and submerged in the fluid to be pumped.
	en.wikipedia.org /wiki/Pump (975 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Pump 20 has a drive shaft 22 rigidly held in the pump housing 24 by a large tapered roller bearing 26 at the rear of the shaft and a small bearing (not shown) at the front of the shaft.
		The diaphragm is supported by the casing and is disposed between the pumping chamber and the transfer chamber and is adapted for reciprocation toward and away from the pumping chamber.
		The diaphragm pump of claim 1 wherein said cylinder has a wall as a part of said housing and wherein said vent is a passage through said wall providing fluid communication from the upper portion of the surface of said cylinder to said hydraulic fluid reservoir.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=04/106884.041209&ELEMENT_SET=DECL (6886 words)

	PumpBiz : GENERAL PUMP QUESTIONS
		Self-priming pump is one that develops a vacuum sufficiently enough for atmospheric pressure (14.7 psi at sea level) to force the liquid to flow through the suction pipe into the pump casing without priming the pump.
		A self-priming centrifugal pump is especially designed with a large chamber at its discharge side that acts both as an air separator that separates the air from the liquid, and a reservoir that holds residual liquid used for priming or re-priming the pump.
		Pumps of the same NS but of different size are considered to be geometrically similar, one pump being a size-factor of the other.
	www.pumpbiz.com /info/index.cfm?fuseaction=faq (2345 words)

	Air bedding system with diaphragm pump - Patent 5606756
		Whereas air flow from the prior art impeller pumps automatically decreases as pressure within the air mattress is increased, such is not the case with the Walker diaphragm pumps; and, absent some sort of safety release valve, there was a danger of overinflation and destruction of the air mattress.
		Thus, the diaphragm pump of this invention is said to be comprised of means for rotating its shaft at a speed of less than 3,300 revolutions per minute.
		In the embodiment illustrated, the diaphragm pump 26 is connected by an external hose 322 to air wedge 318.
	www.freepatentsonline.com /5606756.html (9639 words)

	Diaphragm Pump Troubleshooting: Cavitation & Reduced Performance
		It is primarily a situation in which the pump is discharging less liquid than its rated capacity due to a reduction or lack of liquid supply to the pump intake.
		Cavitation is harmful to diaphragm life because on the suction stroke the diaphragm is being pulled mechanically by the shaft connected to the pressurized diaphragm.
		The lower the suction lift condition imposed on the diaphragm, the less the unbalanced mechanical load, and the longer the diaphragm life.
	www.iglou.com /pitt/diats1.htm (617 words)

	Motor Boating Magazine - Boatkeeper - Pump Maintenance
		The most common pumps on recreational boats are the diaphragm pumps used for pressurizing freshwater and deck washdown systems.
		The only maintenance that diaphragm pumps normally require is regular cleaning of the strainer between the pump and the water supply.
		Single-chamber diaphragm pumps tend to have high capacities and are often found on larger boats, but their inlets must still be effectively filtered.
	motorboating.com /motorboat/boatkeeper/article/0,12696,1070539,00.html (844 words)

	Keco Pump-A-Head
		KECO diaphragm pumps are self-priming and capable of passing 1 1/2" soilds.
		Generally speaking a diaphragm pump works better as a "pusher" as opposed to a vacuum system, which has a greater suction ability.
		A diaphragm pump would typically be located on the dock or seawall.
	www.pumpahead.com /diaphragm.html (114 words)

	Diaphragm pump design - step 4 for beginners
		Diaphragm pumps use a positive displacement design rather than centrifugal force to move water through the casing.
		When the diaphragm is lowered the resulting pressure seals the inlet and opens the outlet valve purging the pump housing of water and air.
		In these environments centrifugal pumps are unable to perform effectively because their high discharge volumes combined with low water levels would cause the pumps to quickly lose their prime.
	www.pumps-in-stock.com /diaphragm_pump_designs.html (393 words)

	The Valspar Corp. (Site not responding. Last check: 2007-10-20)
		Each time the pump failed, it was necessary to completely disassemble, clean and replace the seven o-rings in the center section, and replace the diaphragms.
		This allows the compressed air in the pump to expand gradually, thereby reducing the pressure differential to the point where freezing is not a concern.
		Not only did the pump pass the two-week purchase trial, it ran without a single problem for a year and a half Comerford says he finally had to replace a diaphragm in June of 1995.
	www.techsavvy.com /industry/file/national/0bk8w/vrs07.html?id=129152&comp_id=0BK8W&base_region=* (679 words)

	artCarWash (Site not responding. Last check: 2007-10-20)
		Centrifugal pumps, which are an essential asset in low water pressure areas, are used for pumping large amounts of water.
		Remember, both reciprocating diaphragm and rotary peristaltic are often referred to, in the industry, as chemical dispensers, injectors, metering pumps, diaphragm pumps or chem-feeds.
		It's far easier to replace a diaphragm and pump head complete with valves (usually just four screws) than it is to detail every o-ring and ball seat.
	www.cannonwater.com /artcarwash.htm (450 words)

	ProBrewer Interactive - Centrifugal vs diaphragm pump
		Air diaphragm pumps can be useful in moving beer, but not in moving hot wort or cleaning solutions.
		As it is not possible to get a pump with exactly these characteristics, you need to achieve a slightly higher than required pressure at a constant maximum flow rate, and then throttle the flow back when the filler does not require so much flow.
		Running the pump against a dead end is less of a problem for a centrifugal pump than a positive displacement pump such as a diaphragm pump, and providing the beer is cold enough, a few minutes running against a dead end should not cause any harm.
	www.probrewer.com /vbulletin/printthread.php?t=498 (961 words)

	Dry Diaphragm Mechanical Pump Notes (Site not responding. Last check: 2007-10-20)
		When used as vacuum pumps, diaphragm pumps often have two stages in series to produce a lower ultimate vacuum, or else in parallel to produce a higher pumping speed.
		Diaphragm pumps are often used to replace water jet pumps in the typical "chemical laboratory" applications of vacuum filtering, thin film evaporation, distillation, and gel drying, particularly in circumstances where water vapor may interfere with the product.
		Pumps using the drag mechanism exhaust into a much higher pressure than other types of high vacuum pump, such as turbomolecular or diffusion).
	www.lesker.com /newweb/Vacuum_Pumps/Individual_Pumps/Mechanical_Pumps/Dry_Diaphragm_Technotes.cfm?CFID=544043&CFTOKEN=71901955§ion=diaphr&init=skip (289 words)

	Saniflo Sanitary Diaphragm Pump
		These pumps are constructed of 316 stainless steel (125Ra finish) and utilize 304 stainless steel hardware.
		An optional stand supports the pump during cleaning, inspection, and maintenance.
		Series is a 1" pump with 1 1/2" tri-clamp connections which meets the requirements of applicable 3-A Sanitary Standard (air or hydraulically driven diaphragm pumps for milk and milk products).
	www.iglou.com /pitt/saniflo.htm (435 words)

	GEMPLER'S - Solo 4-gal Diaphragm Pump Backpack Sprayer
		Diaphragm pump generates a low-pressure (maximum 60 psi) resulting in larger droplets with less spray drift.
		Pump handle is adjustable for left or right hand operation.
		This pump generates a lower pressure (maximum 60 p.s.i.) resulting in larger droplets with less spray drift.
	www.gemplers.com /a/shop/product.asp?T1=L475 (197 words)

	Diaphragm pump, Aro and Graco air operated sanitary, chemical process pumps
		Aro and Graco air operated diaphragm pumps for chemical, coatings, paint, pharmaceutical, sanitary, transfer and a host of other applied fluid applications.
		The extensive ARO diaphragm pump line boasts high value, quality built pumps that are made to last in the harshest of applications.
		Graco's diaphragm pumps are used worldwide in chemical, coatings, food, grease, paint, oil, and pharmaceutical applications.
	www.chreed.com /diaphragm_pump.htm (557 words)

	PumpBiz : 580 Water pump Electric Diaphragm - Aquatec Demand Pumps
		Electric diaphragm pump technology designed to meet a wide variety of fluid transfer applications, the 580 series is a classic example of Aquatec's commitment in offering silent solutions to pump applications.
		This pump incorporates powder cast alloys and a unique label sealing process to reduce exposure to moisture which is the major cause of motor failure.
		The pump is capable of operating in a warm, humid, hostile environment where other pumps have been known to fail.
	www.pumpbiz.com /products/index.cfm?fuseaction=pump_series&series_id=289 (307 words)

	Diaphragm Pump (from Internet Glossary of Pumps) (Site not responding. Last check: 2007-10-20)
		Cars often use a Diaphragm Pump to move gasoline from the gas tank to the carburetor or fuel injection plugs.
		The gasoline diaphragm pump in a car is operated by a cam geared directly to rotating parts of the engine.
		Diaphragm pumps are very common and come in many sizes.
	www.maintenanceresources.com /ReferenceLibrary/Pumps/diaphram.htm (168 words)

	Honda Centrifugal Trash Pumps and Diaphragm Pump Information
		Honda trash pumps are designed to allow solids(sticks, stones, and debris) up to 13/16 inch for the 2 inch model and 1 1/16 inch for 3 and 4 inch models to flow through the pump without clogging, making them ideal for construction sites.
		Diaphragm Pumps are one type of pump that is not centrifugal in configuration.
		Honda Diaphragm Pumps are capable of running dry and pumping water with greater than 25% solids by volume.
	www.hondapowerequipment.com /pumcon.htm (444 words)

	Diaphragm Pump offers stall-free air valve technology., ARO - Ingersoll-Rand Fluid
		Users of the aforementioned pumps can leave behind problems like stalling air motors and leaking band clamps, and move up to the energy-efficient EXP line, without having to alter their existing plumbing configuration.
		Oct 27, 2003 - Diaphragm Pump is constructed of stainless steel.
		Oct 16, 2002 - Diaphragm Pump is air-operated.
	news.thomasnet.com /fullstory/458866 (694 words)

	KNF Neuberger OEM Diaphragm Pumps and Compressors
		Just as our standard pump designs have evolved, so has our ability to optimize their performance, which is why KNF products today offer unrivaled efficiency and performance, not to mention quality of construction.
		The first diaphragms were simple circular, flat sheets of an elastomer with a hole punched in the center.
		The diaphragm was clamped around the edges between the pump head and the compressor housing, and fastened to the oscillating connecting rod in the center with a metal clamping disk.
	www.knf.com /oemair.htm (815 words)

	Diaphragm Pumps - from Blagdon Pump
		Blagdon Pump is a manufacturer of Air Operated Double Diaphragm Pumps.
		Blagdon Pump is also registered with BS EN ISO 9001:2000 and BS EN ISO 14001:2004.
		Blagdon Pump is a unit of the IDEX Corporation
	www.blagdonpump.com (79 words)

	Diaphragm Pumps provide quiet operation., Rietschle Thomas UK
		Pumps are suited for medical, automotive, air sampling, and fuel cell applications.
		The new JADE diaphragm pump series from Rietschle Thomas is ideally suited for medical, automotive, air sampling and fuel cell applications.
		The pump is extremely efficient with a low current consumption, coupled with a very low sound level and very little vibration.
	news.thomasnet.com /fullstory/467043/rss (628 words)

	Apex Instruments, Inc. - Pumps and Accessories
		Also, peristaltic pumps are precision flow rate devices with each revolution of the roller assembly delivering a precise amount of gas.
		Finally, peristaltic pumps are self-priming and can handle a wide variety of viscosities, from air to gases to heavy slurries.
		The PP-V145 Peristaltic Pump features a variable speed motor with a solid state controller, flow range from 0-365 ccm and the pump tube material is Tygon.
	www.apexinst.com /products/pumps.htm (421 words)

	Low Volume, Submersible Diaphragm Pump Offered By Smith Lift (Site not responding. Last check: 2007-10-20)
		The pump is similar to conventional submersible centrifugal pumps, but uses a patented true positive displacement, diaphragm pumping unit to improve efficiency, handle solids and pump mixtures of gasses and liquids.
		S/CO This new pump is constructed of stainless steel and is installed similarly to a conventional submersible centrifugal pump.
		The pump typically consumes about one-third of the power required to drive a conventional rod or centrifugal pump, and due to the ability to pump off, more fluid production is typically achieved, especially in high gas situations.
	www.pttc.org /tech_sum/ts_v10n1/ts_v10n1_26.htm (309 words)

	A1 KNF Pumps, Corrosion Resistant Diaphragm Pumps, Vacuum Pumps, Liquid and Sampling Pumps and Compressors by KNF ...
		KNF is a pioneer in the use of PTFE materials for pumps that handle aggressive gases or liquids, and holds over 300 patents; clearly the world leader in diaphragm pump innovation.
		KNF air and gas pump models are capable of handling neutral to highly-corrosive or difficult materials.
		KNF liquid pumps are ideal for use in portable, battery-operated equipment where consistent performance, corrosion resistance, self-priming and long life are important.
	www.knf.com /usa.htm (530 words)

	Double Diaphragm Pump (Site not responding. Last check: 2007-10-20)
		Compressed air entering the chamber behind the diaphragm exerts a balanced force across the diaphragm and against the opposing force.
		Nylon bearings used with diaphragms to operate as flexible membranes (separating air from the product) were prone to swelling in water and lacked chemical resistance.
		Pump service life has been increased at no greater cost than the original nylon bearings.
	www.busakshamban.us /case.histories.htm?cs=200 (73 words)

	Hargraves - Optimizing Diaphragm Pump Performance
		One of Hargraves’ core competencies is the ability to configure a diaphragm pump to the customer’s specific application, using standard components.
		Pump Stroke – The stroke length is the principal contributor to how much flow and pressure the pump produces - the higher the offset, the higher the flow and pressure/vacuum.
		Durometer - The stiffness of the diaphragm elastomer is measured in durometer.
	www.hargravesfluidics.com /optimize.php (836 words)

	Backup washers for diaphragms and diaphragm pump incorporating same (US5894784)
		A backup washer for clamping a diaphragm having a flexible washer disposed next to a rigid washer, the flexible washer including a material less stiff than a material of the rigid washer.
		A diaphragm pump having a diaphragm which is clamped by at least one backup washer having a flexible washer which includes a material less stiff than the material of the diaphragm and a rigid washer next to the flexible washer which includes a material more stiff than the diaphragm material.
		Diaphragm type pump device having a cushion member
	www.delphion.com /details?pn=US05894784__ (255 words)

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