The primary valve on this Solenoid Valve Type SPML, which is actuated by a servo, is screwed on, and the pilot solenoid valve is likewise of the SPML type. This valve has no differential pressure, which is needed to keep it in the open position, hence external pressure is employed to open it. Because of this, low-pressure suction lines are a particularly good fit for the valve. This solenoid valve type SPML may be used with any refrigeration system that uses direct expansion, pump cycle, or spontaneous flow. It is suitable for suction lines, bypass lines, and other applications.