... :0-10bar power:250W, 370W, 2ph or 3ph automatic diaphragm dosing pumpsautomatic stroke controller transfer pump pump manufacturerProduct DescriptionFlow:0 ... 28 Features1.Very high safety of operation. Mechanical actuate diaphragm. Changeable eccentric drive2.Power off seal,no leakage,with ... the life span, the first layer is Teflon anti-acid diaphragm, the second is EPDM stretch rubber, the third is ...