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Old 01-30-2012, 03:43 PM   #1 (permalink)
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Low pressure regulator for an air cannon

Hey guys, I have a friend that is putting together an air cannon. He is looking to run it at about 80 psi. What is the best reg to use on this set up? I remember that the field I worked at had some using CP regs (presumably with low pressure springs). Also, have any recommendations on where to find a cheap gauge that is 0-100 or 0-125?

If anyone has a beater reg that would be suitable, you are welcome to PM.

Thanks!
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Old 01-30-2012, 03:45 PM   #2 (permalink)
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Get yourself an air compressor reg. Very adjustable below 100psi. They will only take about 200 input so you should reg it down with a normal paintball HPR then use the compressor reg as your main adjustment.
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Old 01-30-2012, 03:46 PM   #3 (permalink)
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Couldn't you use a PPS rock reg? It has an overpressure relief.
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Old 01-30-2012, 03:52 PM   #4 (permalink)
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I would be worried about recharge rates with a rock. Air cannons generally have quite a large volume, though you probably won't be firing that fast, you never know.
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Old 01-30-2012, 04:12 PM   #5 (permalink)
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That would be my guess, that recharge wouldn't be too much of an issue.

That said, the rock internals are almost the same as a standard Stabilizer. The only thing that should affect recharge significantly compared to your normal inline reg would be the 10-32 output instead of 1/8 NPT or ASA.
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Old 01-30-2012, 04:50 PM   #6 (permalink)
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I have seen a lot of air canons just using a low pressure Stab. A Fatty with low pressure springs should work for your purpose. Personally I am nor so fond of CP regs they are more of a controlled on/off valve than an actual regulator. Though I do agree with Sniper, a reg from an shop compressor would work well for your needs. Run an inline Stab on a remote and feed into the other reg.

As fr gauges go check McMaster-Carr Just remember a gauge reads the most accurately in the middle range, so if you want an 80 psi operating pressure get a gauge that reads something like 150-160 max.
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Old 01-30-2012, 05:12 PM   #7 (permalink)
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That would be my guess, that recharge wouldn't be too much of an issue.

That said, the rock internals are almost the same as a standard Stabilizer. The only thing that should affect recharge significantly compared to your normal inline reg would be the 10-32 output instead of 1/8 NPT or ASA.
palmers sells a 10-32 to 1/8 npt adapter somehwere on their site. recharge is going to be slow anyway, and depending on what materials are used for the dump chamber its probably a good idea.

I just ended up using an ion reg for mine. mine had a 125 psi pressure release valve as well. here is a link to my very old howto:
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Old 01-30-2012, 05:15 PM   #8 (permalink)
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Ion reg actually sounds like a great solution as long as you can source a pressure relief valve.
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Old 01-30-2012, 05:21 PM   #9 (permalink)
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Ion reg actually sounds like a great solution as long as you can source a pressure relief valve.
Ace hardware sells a couple different ones in their air compressor section. 1/4NPT if I recall correctly. just make it a part of the inline system:


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Old 01-30-2012, 05:24 PM   #10 (permalink)
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