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Diaphragm Pump

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diaphragm pump [′dīยทə‚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
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.

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.



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With the introduction of its newest range of pumps, Pulsafeeder, an innovator of metering pumps for over seventy years, has re-invented the hydraulically balanced diaphragm pump design.
A variety of double diaphragm pumps are available, including: PDM 0.
DEPA Air Operated Diaphragm pumps are designed and manufactured by German-based Crane ChemPharma Flow Solutions.
 
 
 
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