The Solenoid Control Valve is an on/off control valve depending on an electric pulse to the solenoid valve. The solenoid valve either permit inlet pressure into the main valve operating chamber or discharge pressure from the operating chamber. A 3-way solenoid valve activated by an electric current or an electric signal. The main valve opens when the solenoid valve is energized or the main valve closes when the solenoid valve is de-energized . The standard valve is supplied in the “normally closed (NC)” position. The “normally open” position is optional.