... and frequency, solenoid-driven diaphragm metering pump. Can be used for the measurement of a variety of liquid transport. The metering ... .82AC220V/50HZMaterial Table Diaphragm: PTFE Pump head: PVC, PP, PVDF One-way valve: PVC, PP Bottom valve filter: PVC, PP Injection ... , PP Hose: PVC, PE, PTFE Sealing: PTFE Frank metering pump for waste water treatment made in China