Quick exhaust valves are designed to quickly exhaust pneumatic cylinders. This increases the cylinder rod speed by dumping exhausted air directly at the cylinder port. Using a QEV to increase cylinder speed allows for a smaller valve to be used in the system. Specifications and dimensions can be found online or in the Mead catalog.
Pressure Range (#1B, #2B, and # QEV): 30 to 125 PSI
Pressure Range (#4, #5, and #6 QEV): 15 to 150 PSI