... , low Leakage. 3.Easy to implement remote control. Two Way Pneumatic Water Flow Control Valve Main Technical Parameters DN(mm)1520253240506580100125150200250300350400450500600Ball core typeFloat ... formair-to-open,air-to-closeactuatorSingle acting pneumatic actuator or Double-acting pneumatic actuatorsAvailable Accessories solenoid valve,air filter,lock up valve,switch,Valve position transmitter, ...