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- Tue Oct 29, 2013 7:03 pm
- Forum: Pneumatic Cannons
- Topic: Piston Valves Explained Visually
- Replies: 177
- Views: 133243
The closed-cell foam used as a sealer on the inside and the outside of my piston valve cup compresses nicely to form a seal but it is a little fragile and gets torn by the air pressure. I am wondering what PSI is adequate to begin to experience the impulse effect: where the cup slides back and the p...