Pneumatic valves include any valve with a flexible elastomer body that can be pinched closed, cutting off flow, using a mechanism or fluid pressure. Let's us see pneumatic valves of some information.

  Pneumatic valve are full bore, linear action valves so they can be used in both an off/on manner or in a variable position or throttling service.  Gate or knife valves are linear motion valves in which a flat closure element slides into the flow stream to provide shut-off.