1. Type:Foot valve Intake 2. Size:6mm-2000mm 3.Material: ... ,JB,GB TypeProduct6mm-2000mm Foot Valve Intake in Water ProjectValve,Foot valve,Bottom valve,Flush bottom valvesSize6mm-2000mm(1/ ... GBApplicationwater, oil,air ,steam,etc Bottom valve is an energy-saving valve,which is usually installed in the pump ... go back, so liquid can only flow in without out. There are many intakes and strengthen tendons ...