High Flow Diaphragm Metering Pumps GB mechanical diaphragm metering pump belongs ... Pump head: PVC, PTFE,SS304,SS316 Diaphragm: PTFE Check Valve: PVC, PTFE,SS304,SS316 (same as pump head selection ... )Valve ball: Ceramic, SS304,SS316Parameter TableModel50Hz60 HzPressureDiaphragm Dia. (mm)Power kW(HP)Flow (lph)Flow (gph)SPMFlow (gph)Flow (lph ...