Thanks to our experience with hydraulic fast-acting actuators, we have developed and designed bespoke pneumatic quick exhaust valves for large pneumatic spring return actuators. This design reduces to a minimum the dead time after pilot signal cut-off, allowing the valve to reach extremely fast emergency stroke times even when a high flow capacity (typical of big pneumatic cylinders) is required. Quick exhaust valves can be provided complete with hydraulic damper to smooth final degrees of the closing stroke, protecting the valve seat and reducing shock and vibrations on the valve and pipeline.
This execution allows the valve to reach fast stroke times up to 0.3 seconds (depending on cylinder volume and working pressure).
