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3/4" QEV piloting

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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3/4" QEV piloting

Unread postAuthor: woodscout » Tue Jun 01, 2010 11:28 am

is the 3 way push button valve(small) enouhg to pilot an 3/4" QEV? its going to be used on a marble rifle. also how much pressure do i need to shoot the marbles pretty high velocity because my chamber size is going to be 20mm x 180mm?
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Unread postAuthor: jrrdw » Tue Jun 01, 2010 4:33 pm

What valve 'exactly' (part number, link, picture) are you talking about. What is your chamber made of? You have to be more discriptive, we are not mind readers...
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Re: 3/4" QEV piloting

Unread postAuthor: spudtyrrant » Tue Jun 01, 2010 4:39 pm

woodscout wrote: how much pressure do i need to shoot the marbles pretty high velocity because my chamber size is going to be 20mm x 180mm?
depends what your definition of high velocity is, 200 fps 1000fps, or some other number?
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Unread postAuthor: MrCrowley » Tue Jun 01, 2010 5:26 pm

I think it would be too small. Even if it could pilot a QEV, it wouldn't do it very well. That's assuming the 3/2 is 1/8" threaded.
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Unread postAuthor: POLAND_SPUD » Tue Jun 01, 2010 9:58 pm

yeah most 1/8" valve will have too little flow... possibly clippard's MJVO-3 is good enough but I can't test it


alternatively you can use an aux. QEV to pilot the main QEV

I tested this with a 1/8" QEV that you can see in the pic below and it works great
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