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Using 2 QEVs in parrallel

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Using 2 QEVs in parrallel

Unread postAuthor: Ianbuckwell » Thu May 08, 2014 11:29 am

Did a quick search and found one result of using 2 qevs, is it possible to use 2 in parallel to increase power/air flow, these even look like they were made to be joined together with other items. Just wondered as 3/4" qevs are cheap and 1" qevs from same eBay source about ~$60. This is just out of interest really or dos they not work well inparralel?
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Ianbuckwell
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Re: Using 2 QEVs in parrallel

Unread postAuthor: matti » Fri May 09, 2014 3:32 am

When using two smaller valves parrallel, you should remember that for example two 1/2" valves is not same as one 1" valve..

Two half inch valves together has a flow only about half of the flow that one 1 inch valve has. :wink:
You should calculate the flow difference for two 3/4 and for one 1" valves, then see what you want to use.

Oh.. And yes if you want you can use them parrallel. but pilot volumes should be same for both valves and use one valve for piloting both qevs. :)
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Re: Using 2 QEVs in parrallel

Unread postAuthor: jackssmirkingrevenge » Fri May 09, 2014 5:28 am

Short answer, one QEV of sufficient diameter is enough ;)
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Re: Using 2 QEVs in parrallel

Unread postAuthor: Ianbuckwell » Fri May 09, 2014 7:49 am

Just thinking if someone wanted to make something a bit bigger than the 3/4 that really only seem 1/2s with the gold inserts installed, the 1 inches seem to jump up in cost significantly, it was really just wondering if it is possible, and it seems so, thanks.
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