tomthebomb137 wrote:so i was talking to someone who had a pretty serious air cannon rig and he was using a "pulse valve" which i guess has 2 diaphragms and supposivley opens absurdly fast, unfortunatly, googling them failed to turn up any helpful info. Anyone know about these/where to buy them?
A pulse valve and a QEV are the same thing. The only real difference is that different industries use different terminologies.
For what it's worth, "pulse valve" will be used in industries where dust collection systems are important. They use them to send a pulse of air down some pipes or whatever to blow dust out of the lines.
Meanwhile, a "QEV" is more likely to be found on something like traditional pneumatic equipment as a safety valve (ie, something to dump ALL system pressure).
As for the 2 diaphrams, that's no doubt just a reference to a cascading system for a largish QEV/pulse valve.