... control. Two Way Pneumatic Water Flow Control Valve Main Technical Parameters DN(mm)1520253240506580100125150200250300350400450500600Ball core typeFloat ... -acting pneumatic actuatorsAvailable Accessories solenoid valve,air filter,lock up valve,switch,Valve position transmitter,Emergency action equipments, ... GB/T 12237-2007,GB/T 4213-2008The valve structure lengthGB/T 12221-2005Flange StandardJB/T ...