AUXILIARY VALVE

 Stop valves mounted on the cylinder inlets allow a flow of air only in the
presence of an pneumatic pilot. Unidirectional and bidirectional versions
are available.This item is mainly used as a safety valve. When pressure
drops in the pneumatic pilot, all cylinder movement is halted.

The 3/2 slide valve is normally used as a circuit on-off valve. When the
ring nut is moved back, the system downstream is relieved; when the ring
nut is moved forward, the system is supplied with compressed air.