... return) function, The best alternative to the solenoid valves.Manual override option 2way solenoid ball valve ParameterSize: 1/4",1/2",3 ... fail safe(auto-return) function best alternative to the solenoid valvesEnclosure:IP65Main export areas:Europe,Asia,North America, South ... suitable for heavy pollution conditions. 5.Good substitution for solenoid or pneumatic valve. 6. High protection class,can be ...