Propane Regulator

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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Sonicboom101
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Wed Oct 31, 2007 8:49 pm

hey i need some help on choosing a regulator for my gun it requires 125 PSI of propane pressure. My last regulator was a piece of crap. So I want to get the right one now would this one work? http://www.amazon.com/exec/obidos/tg/de ... N&v=glance

If you guys could help me choose one that would be great thanks!
sjog
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Wed Oct 31, 2007 9:31 pm

I have tried to use the cheep inlines , they leaked a LOT.
I have used a real propane reg. they dont leak gas but the ones I got and looked at only went to 60 psi .

If I'm not mistaken for combustion the reg. is not needed w/the proper meter pipe?
cwazy1
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Wed Oct 31, 2007 9:54 pm

yeah, why do you want one of those?? why not just set up a normal propane meter and meter it directly into your length of pipe?? or if you want a valve before the tubing, you can always get another ball valve and use that to "guestimate the real pressure while filling your meter. . .
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spudgunnerwryyyyy
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Wed Oct 31, 2007 11:03 pm

Get a regulator from an air compressor that has a max input pressure of at least 150, then it will be nice, durable and be very accurate.
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Fnord
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Thu Nov 01, 2007 10:37 am

I had one of those regulators. It lasted about 2 mins before an oring cracked.
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Sonicboom101
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Thu Nov 01, 2007 12:35 pm

thanks for the help but i still want a regulator someone said use an air compressor regulator would this one work?


http://www.lowes.com/lowes/lkn?action=p ... lpage=none

Thanks for the help!
Last edited by Sonicboom101 on Sat Nov 03, 2007 1:34 pm, edited 1 time in total.
pyrogeek
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Thu Nov 01, 2007 1:33 pm

I use one from Harbor Freight. On sale it was like $4. It leaks when I drop the pressure, but it's not a big deal as long as you do it outside.
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sjog
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Thu Nov 01, 2007 5:34 pm

That reg. looks pretty good. It says that when adjusting it vents air down stream ,but might work correctly with a 'dead end'


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The best reg is non-reliving= no gas leak/smell

http://www.google.com/search?q=non-reli ... rt=10&sa=N
sandman
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Thu Nov 01, 2007 6:19 pm

i am very sure that your gun does not need 125 psi, unless you are talking about your meter in which case your meter would have to be really small.
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DYI
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Thu Nov 01, 2007 7:02 pm

Why don't you just make the meter bigger? On a cold day, a propane tank won't even have 125psi of pressure in it. Unless the average temperature where you live is >30 degrees Celcius, I would suggest a larger meter.
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BigGrib
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Thu Nov 01, 2007 7:45 pm

pyrogeek wrote:I use one from Harbor Freight. On sale it was like $4. It leaks when I drop the pressure, but it's not a big deal as long as you do it outside.
Yeah I tried that piece of crap, couldn't get it to seal worth a damn. Definatley agree that a non-relieving regulator is the way to go but the one from the Lowes website would work for what you're doing.
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Sonicboom101
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Sun Nov 04, 2007 11:57 am

Thanks for the help I dont really care if it leaks just a little bit because im using my guns outside. I think I will go with the one from Lowes if it leaks only when I change the pressure I dont care because I wont be changing the pressure that many times. Thanks again I'll let you guys know if I need help again.
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