HAK pneumatic (3 Way / 3 Port / 2 Position) mechanical valve with Momentary Roller Lever, NPT 1/4" (MSV98322R) #8481.2052 and UV exposure

and UV exposure

They are often simply just called one-way air valves

the valve prevents media from flowing

5" 0-3000 1/4" NPT HAK-LPG25-5000-LM

HAK pneumatic (3 Way / 3 Port / 2 Position) mechanical valve with Momentary Roller Lever, NPT 1/4" (MSV98322R) #8481.2052 and UV exposureDescription * Pneumatic Mechanical Momentary Roller Lever Valve Type: 3 Port 2 Position Normally closed.* A High Quality Valve body is made of Aluminium material, with long serving life; seals initially imported from Japan.* The Anti friction seal is added at both ends of the valve spool to make the valve spool more stable during the switching process and increase the valve lifetime.* This is a Three way, air pilot valve with a spool design requiring