... closed solenoid valve ,can be used for deforsting refrigeration system,the flow control and on-off control ect.At present ,it ... solenoid valve basic stucture is composed of a coil and the movable iron core which lacated in a coil o. When ... the drier core ,open the valve through the remove core ,the reset action of valve ,is finished by ues the valve core gravity and the spring at the ...