5/3-way air-piloted valve, closed centre, G 1/4, 850 l/min, pilot port G 1/8 - E.MC

When a cylinder has to do more than reach its two end positions, stopping or being released along the way, a 5/3-way valve is the right choice. This valve from the E.MC RVA series is switched purely pneumatically through two G 1/8 pilot ports and passes up to 850 l/min at its G 1/4 port with a nominal diameter of 4.8 mm. With no pressure on either pilot port, the spool sits in the centre position. All ports are then blocked, so the cylinder stops where the signal drops out, with air trapped in both chambers.

Advantages

• Flow rate of 850 l/min at 4.8 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.
• Valve body and spool in aluminium alloy, POM piston, NBR O-rings.
• Operating pressure of 1.5 to 8 bar with a 12 bar test pressure, and the air does not need to be lubricated.
• Service life of at least 40 million switching cycles, roughly 11,000 operating hours at one cycle per second.

Applications

• Medium-size cylinders with higher air demand where the exhaust should also be led off in G 1/4.
• Holding the piston position when both control signals drop out at the same time.
• Purely pneumatic controls in areas where no electrical wiring is to be installed.