Servo-assisted piston valve available in NC and NO versions. A minimum differential pressure is required for the valve switching function. The solenoid coils are moulded with high-quality epoxy resin. In combination with a plug to DIN EN 175301-803 Form A, the valves satisfy degree of protection IP65. The plug is not included and must be ordered separately. Diameter of up to DN 25. Vibration-proof, screwed coil system. Moulded housing with high surface quality. Explosion proof versions. Suitable for gas and steam applications.