Homemade high pressure pump

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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SpudBlaster15
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:21 pm, edited 1 time in total.
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paaiyan
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How about a good silicone-based lube?
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jackssmirkingrevenge
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moly lube :D
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:21 pm, edited 1 time in total.
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joannaardway
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I'd personally use silicon grease. Much thicker than the spray, it's ideal for moving seals.
It's not very cheap, but it's the best there is.
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Hawkeye
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Building a check valve into each gun is about the simplest thing to do.
All you need is a threaded 1/8-1/4 brass reducer, a spring from a pen, and a small nail and tiny o-ring.
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:20 pm, edited 1 time in total.
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schmanman
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spudblaster, I see how the air gets out (through the one check valve, but you really need a tee there. one for the intake ( flipped the opposite way of the output, so it pulls in air, compresses it, and pushes it out through the other check valve.
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schmanman
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oops....


couldn't tell from the drawing. :oops:
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Hawkeye
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You will find that a direct attachment is actually better as your hose attachment will blow up pretty quickly from overheating and pressures beyond its capabilities unless you borrow the hose from a shock pump. Putting a different check valve on each gun is cheap and better in the long run.
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Hawkeye
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Hose clamps and 300 psi and you're not worried about it bursting from overheating? If the hose is just typical bike pump hose, it will burst pretty quickly if you start stringing shots together before it has a chance to cool.
It will tend to burst right where the hose exits the pump.
Basically think of the hose system as a pressure vessel that needs to go to 300 psi and spike in pressure every time you pump down on the handle.
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Fnord
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I found that typical bike pump hose (the stuff about 1/4 in diameter which doesn't have any type of threads running inside it) will burst at 350-400 psi.

I forgot to disconnect my propane meter from my hybrid once, and the marble I shot decided not to leave the barrel, so the air escaped from the only place it could, which was through the hose walls.
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:26 pm, edited 1 time in total.
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