KNOB; FOR RELEASE VALVE (352005…/ 352006…/ 352007…)

The function of a quick-release valve is to rapidly exhaust air from the controlled device. It is normally located adjacent to the controlled device, rather than requiring exhaust air to return and exhaust through the control valve. This decreases release time.

A check valve is a device that only allows the flow of air in one direction and are commonly referred to as non return valves or one way valves.