Diaphragm Pump


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diaphragm pump

[′dī·ə‚fram ‚pəmp]
(mechanical engineering)
A metering pump which uses a diaphragm to isolate the operating parts from pumped liquid in a mechanically actuated diaphragm pump, or from hydraulic fluid in a hydraulically actuated diaphragm pump.

Diaphragm Pump

 

(also called membrane pump), a pump in which the role of the piston is played by a flexible plate or diaphragm that is fastened at its periphery and is flexed by the action of a lever mechanism or by variations in the ambient pressure. Deflection of the diaphragm in one direction causes suction of the liquid being pumped; deflection in the opposite direction applies pressure to the liquid. Diaphragm pumps are used in conveying water that contains an admixture of soil (so-called frog pumps) and in conveying chemically active or flammable liquids.

diaphragm pump

A pump in which the piston is replaced by a clamped diaphragm that is set in vibration by a reciprocating rod, attached at its center.
References in periodicals archive ?
Thanks to recent advances in diaphragm pump technology, this pump type is preferred over traditional reciprocating piston, scroll or rotary pumps.
Designed to meet high standard of cleanliness and specific requirements for the food and beverage industry, these diaphragm pumps are easy to operate and maintain.
The 7615 is an addition to the existing type 7604 micro pump, which is a unique, self-priming, adjustable, diaphragm pump measuring only 11mm in width and designed for continuous pumping applications in the l-5ml/min range.
This new unit contains a rugged, high flow rate diaphragm pump, and a high capacity bag filter, mounted in a compact frame.
This is a non-metallic air-operated diaphragm pump which combines efficiency, style and reliability.
* The Toppa Series pneumatically powered diaphragm pump is new from E.
Accordingly, NIST researchers modified a commercial diaphragm pump and tested it for use with polarized [He.sup.3] gas.
Also to be shown for the first time will be the Hydra-Cell Q155 high horsepower quintuplex diaphragm pump.
Additional .features include: an aluminum rotor that holds up to 40 microcentrifuge tubes and 108 12- to 13-mm tubes; built-in chemical-resistant diaphragm pump; and the CentriZap Strobe Light.
If contractors are uncertain whether the standing water contains traces of diesel fuel or combustible substances, they should opt for an air-operated diaphragm pump, which meets applicable codes and grounding requirements.
Graco introduces the Husky[TM] 3300, a 3-inch (76.2 mm) air-operated double diaphragm pump family.