1,The 2W series water valve are zero differential valve series. 2,Used for many conditions especially for water treatment syst The 2W series water valveare zero differential valve series and are used for many conditions especially for water treatment system,with thread size from G1/8" to G2".Port size: G1/8"~ G2"Motion pattern: Direct ActionWorking Medium: Air,Water,Oil,GasType: Normal Close ...