... ,waterproof,moisture proof SSV25W-28 solenoid valve :SSV series two-way bi-flow solenoid valves are mainly used for ... series can reduce the amount of check valves and solenoid valves in the refrigeration system, which makes system pipeline ... R407C,R404A/507,air,water and oil.Optional voltage of solenoid coils: A.C.: 24V,36V,110V,220V,380V.D. ... flange,K means normal opened valves. SSV25W-28 solenoid valve