Kuhnke 47.300 Pneumatic Quick Exhaust Valve.
Quick exhaust valves are designed to exhaust connected devices quickly to atmosphere when the pilot pressure is removed. Pilot pressure is applied to port 1 of the valve which shifts the mechanism so that air can only pass through port 2. Upon removal of pilot pressure to port 1, back pressure from port 2 closes the mechanism to port 1 then passes through port 3.
The Kuhnke 47.300 quick exhaust valve is constructed of brass, the port size is M5 female threaded.
Please click here for further information.