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Schrader valve as pilot; better options?

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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Schrader valve as pilot; better options?

Unread postAuthor: Doodmens » Tue Aug 18, 2015 12:35 pm

Hi there,

I am desiging a new gun that has a chamber-fed QEV in it. I want the pilot part as compact as possible so I thought a schrader
vavlve would be good to use. However, I read around the forums a bit that using a schrader is very inefficient compared to other (?) valves.

tl;dr

Does anyone have recommendations for a pilot valve that is very small yet more efficient than a schrader valve?

P.S if you want I can upload some sketches
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Re: Schrader valve as pilot; better options?

Unread postAuthor: jackssmirkingrevenge » Mon Sep 07, 2015 8:19 pm

With a well made piston setup - ie tight fitting piston and minimum dead space - the size of the pilot is not that important. A QEV with its piston design represents such a set up.

This project used a schrader valve to pilot a 1" piston and it worked great.
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