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check valve

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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check valve

Unread postAuthor: homedepotpro » Thu Sep 20, 2007 10:13 pm

here is my idea for a check valve. i want to use it on a high pressure pump (like 200psi).
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Unread postAuthor: experament-u2 » Fri Sep 21, 2007 1:17 am

looks good i think it would work
are you going to try build one i think it woudl be good as
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Unread postAuthor: Hubb » Fri Sep 21, 2007 5:23 am

Looks like it would work but it also looks like it would be a lot of trouble. My local hardware store sells 1/4" npt check valves. It just seems easier to buy one.
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Unread postAuthor: psycix » Fri Sep 21, 2007 6:36 am

Why not just buy one.

But when you still want to build it:
It will work and the design looks very nice BUT!!!
make very very sure the pipe is cut square and set 100% straight or it wont seal.
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Unread postAuthor: homedepotpro » Fri Sep 21, 2007 8:43 am

hubb017 wrote:Looks like it would work but it also looks like it would be a lot of trouble. My local hardware store sells 1/4" npt check valves. It just seems easier to buy one.

what store?
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Unread postAuthor: SpudBlaster15 » Fri Sep 21, 2007 8:49 am

This design has too much dead space for my liking. If you are building a high pressure pump, integrate the check valve into the body of the pump, and have the pump head touch the check valve's piston at the bottom of it's stroke. This will eliminate as much dead space as possible, and enable you to reach higher pressures.
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Unread postAuthor: Hubb » Fri Sep 21, 2007 8:56 am

homedepotpro wrote:
hubb017 wrote:Looks like it would work but it also looks like it would be a lot of trouble. My local hardware store sells 1/4" npt check valves. It just seems easier to buy one.

what store?


It is a local, one town, store called Well's Hardware. They have all kinds of weird fittings most have never even heard of. I was fortunate enough to work there for a couple of years during high school so I got pretty familiar with all this stuff (which greatly aids in the continuation of this hobby).
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Unread postAuthor: acoop101 » Fri Sep 21, 2007 1:14 pm

If you can not find them local check out McMaster Carr at mcmaster.com they have just about everything you could ever need. :D :D :D Check it out. shipping is reasonable and they ship promptly.
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