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PCP Pumps

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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PCP Pumps

Unread postAuthor: n05gr0th » Mon Dec 14, 2015 8:26 pm

I'm looking for a good multi-stage PCP pump capable of filling an approx 20 CI chamber to 35 bar/500 psi in under 2 minutes.

So far this seems like the best option: http://www.pyramydair.com/s/a/Benjamin_ ... _Guns/2222

Does anyone know of something better? Also, is there a formula I can use to estimate fill time based on the characteristics of my chamber and a given pump?
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Re: PCP Pumps

Unread postAuthor: mark.f » Tue Dec 15, 2015 2:15 am

If you're looking for only 500 PSIG there are quite a few air conditioning compressors out there which will work well enough. The compressor I pulled out of a window unit could go quite high (~600 PSIG) before starting to stall.
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Re: PCP Pumps

Unread postAuthor: n05gr0th » Tue Dec 15, 2015 5:36 am

That would be nice, but I lack the tools or knowledge to modify one, and they aren't exactly readily available when I go spudding over the summer (cabin in the middle of nowhere). Surely a multi-stage pump for a chamber volume like mine at those pressures isn't that crazy?
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Re: PCP Pumps

Unread postAuthor: mark.f » Tue Dec 15, 2015 12:09 pm

No, it's not that crazy.

There exists on this forum a two-stage homemade PCP pump... it will take a little digging to find, I'll edit this post when I do.

You can also buy multi-stage PCP pumps, but they're optimized for pressure and not volume, so 500 PSI will be a little slower than a purpose-built pump... compare it to using a crowbar to lift a mere 45 lb. ammo can instead of just picking it up. :)
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Re: PCP Pumps

Unread postAuthor: jackssmirkingrevenge » Tue Dec 15, 2015 8:36 pm

mark.f wrote:There exists on this forum a two-stage homemade PCP pump... it will take a little digging to find, I'll edit this post when I do


how-to-database/topic13277.html

oh you meant the two stage?

Ayyyy still got it: pneumatic-cannons/topic18170.html
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Re: PCP Pumps

Unread postAuthor: mark.f » Tue Dec 15, 2015 11:08 pm

There it is! I admit the new version of search is a little too finicky to use my former skillz on...
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Re: PCP Pumps

Unread postAuthor: jackssmirkingrevenge » Wed Dec 16, 2015 7:16 am

I... I used google :oops:
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Re: PCP Pumps

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