Detailed Product Description SV series two ways normal closed solenoid valve with diaphragms can be widely used in refrigeration, pneumatic ... and hydraulic system, also in boiler and fire-fighting, etc.Solenoid valves use full-closed magnetic coil and DIN international standard ... ,R407C,R404A/507,air,water and oil.Optional voltage of solenoid coils: A.C.: 24V,36V,110V,220V,380V.D.C ...