25 pound LP cylinder

60 acre hillside · Apr 5, 2014

I need a small tank to plumb into an air control system. A new cylinder at about $30 seems like a low cost option provided it can withstand 90 to 100 psi and I assume it has a 3/4 tapered pipe thread in the top of the tank. I plan to remove the valve. I know it is not the intended use but want to know what to expect to go wrong.

JMS/.MN · Apr 5, 2014

I used a new 20 lb tank to make an oil bleeder (like a brake bleeder) for filling hard to reach tractor differentials. No problem hooking it to the air compressor with 100psi or more inlet.

Eldon (WA) · Apr 5, 2014

(quoted from post at 10:54:55 04/05/14) I need a small tank to plumb into an air control system. A new cylinder at about $30 seems like a low cost option provided it can withstand 90 to 100 psi and I assume it has a 3/4 tapered pipe thread in the top of the tank. I plan to remove the valve. I know it is not the intended use but want to know what to expect to go wrong.

I plan on converting one to an air tank. I was thinking it might be easiest to just get a POL adaptor and leave the original valve on the tank. I was told they are loctited in a could be a pain to remove.

Anonymous-0 · Apr 5, 2014

Shouldn't be a problem at all. Propane tanks are usually rated for 250 PSI. You can buy kits to convert them to air tanks.

504 · Apr 5, 2014

Anybody that fills tanks will probably give you a tank with the old valve in it for free,then use an old LP to pipe adapter.
That will give you a shut off valve and safety all in one.

Eldon (WA) · Apr 5, 2014

(quoted from post at 12:09:58 04/05/14) Anybody that fills tanks will probably give you a tank with the old valve in it for free,then use an old LP to pipe adapter.
That will give you a shut off valve and safety all in one.

I'm using one of those old tanks...anyone know what psi the "pop off" valve lets loose??

Russ from MN · Apr 5, 2014

We were just discussing that the other day so I researched it. I found that the relief is supposed to be set to 312 psi. I have gotten old steel fork truck tanks and used them for air compressor tanks, work real well!

schrade · Apr 5, 2014

Where I work we change the valves on 20 lb tanks all the time, only problem is holding tank. We have a 2" ratchet strap bolted to a stand that we strap it in and just turn it out. Yes 3/4" pipe threads. We have a wrench we made that fits on valve, use a 3/4" drive ratchet.

VicS · Apr 5, 2014

I made a foamer tank for the sprayer from one, and a tire bead blower upper. from another. The valve is hard to get out but it will come out. They will always have a little LP in the pores so be careful of flames around them with the valve out. I have cut them with a torch after I ran Air in them for 30 minutes or so.

25 pound LP cylinder

60 acre hillside

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JMS/.MN

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Eldon (WA)

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Anonymous-0

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504

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Eldon (WA)

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Russ from MN

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schrade

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VicS

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