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Improvement on cavitation performance of diaphragm metering pump |
CHAI Li-ping, LI Qiang, GONG En-xiang, HE Yu-jie |
Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract Concerning with the problem of cavitation easily occurring on the imported diaphragm metering pump in petrochemical plant,an improvement design is made on the composite membrane of diaphragm pump,pair of plunger seals,structure of hydraulic balance and compensating valve.Methods are taken such as to improve the safety relief valve and oil immersion type compensation system,to adopt pump base with bigger bearing capacity and unique staged plunger,to increase piston diameter and to adopt PTFE+NBR composite membrane,etc.To improve the cavitation performance of diaphragm metering pump,a comparison of cavitation test is made between the modified diaphragm metering pump and the original measuring pump.The improved structural design and adoption of new materials have greatly improved the cavitation performance of metering pump.
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Received: 08 August 2013
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