5/3-way air-piloted valve, exhaust centre, G 1/2, 1350 l/min, pilot port G 1/8 - E.MC

When an actuator has to stop in a defined way rather than just extend and retract, it needs a third switching position. This valve from the E.MC RVA series is switched purely pneumatically through two G 1/8 pilot ports and passes up to 1350 l/min at its G 1/2 port with a nominal diameter of 6.2 mm. With no pressure on either pilot port, the spool sits in the centre position. Both working ports are then open to exhaust. The actuator is depressurised and can be pushed by hand.

Advantages

• Flow rate of 1350 l/min at 6.2 mm nominal diameter, enough air for brisk strokes without the valve throttling them.
• Pilot pressure of 2 to 8 bar on two G 1/8 ports, so the signal comes from the same air supply as the valve.
• Service life of at least 40 million switching cycles, roughly 11,000 operating hours at one cycle per second.
• Operating pressure of 1.5 to 8 bar with a 12 bar test pressure, and the air does not need to be lubricated.

Applications

• Actuators that must be free of force while the machine is stopped, for example during maintenance.
• Large-volume cylinders and rotary actuators that need 1350 l/min at a G 1/2 port.
• Purely pneumatic controls in areas where no electrical wiring is to be installed.