... -tech Development Zone, Depamu (Hangzhou) Pumps Technology Co., Ltd. is a professional ... manufactures metering pumps, high pressure reciprocating pumps, leakage-free chemical pumps and packaged chemical ... pumps and chemical pumps, and developed internationally leading three diaphragm pumps, four diaphragm pumps, diaphragm leakage alarm pumps, heat-insulating diaphragm pumps and special features pumps ...