... Operating principleWhile energized in coil, the electromagnetic power opens the small orifice. Then the pressure in upside of valve reduced, so ... in the coil, plug stem will drop and close the small orifice because of spring force and its weight. When ... and oil.Optional voltage of solenoid coils: A.C.: 24V,36V,110V,220V,380V.D.C.:12V,24V,110V,220VType and data ConnectionformModelConnectiondimension ...