... System: 2 and 3 phase motor,12V Or 24V motorFlow Control: Manual operationProtection degree: IP55MaterialPump head: SUS304, SUS316, PVC, ... and introduction valve .Features1.Very high safety of operation. Mechanical actuate diaphragm. Changeable eccentric drive2.Power off seal,no leakage ... , agriculture, national defense department and etc.Measurements JMW Mechanical Diaphragm Metering Pump