The Festo pneumatic valve has can be used for vacuum when connected up to provide a normally-closed function. It has poppet seat of structure and used mechanical spring for reset. Its width size is 26 mm and used operating pressure up to -0.95 - 10 bar. Its standard nominal flow rate is 500 l/min.

Ambient temperature is -10°C to 60 °C
Aluminium die cast material used for piston slide