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O.T. Air tank question

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ratropia

01-12-2006 10:58:50

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I am considering using old 20-30 pound refrigerant tanks(freon)to hold back up compressed air. An HVAC repair guy told me it would hold 400psi. I was hoping for some wisdom from the ages so to speak, if any one has any thoughts I would be thankin ya'. Also how would I fill them using my own electric air compressor?
Thanks Rick T.

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david b guest

01-12-2006 20:47:05

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

Hey ratropia! Any old tanks of R-12 around? Worth couple hundred dollars or so. Even R-22 about 80 bucks @ 40 lbs can.

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ratropia

01-13-2006 04:00:01

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Re: O.T. Air tank question in reply to david b guest, 01-12-2006 20:47:05

I have one empty r-12 and one full r-12 a ful 409a and 404a and an empty 409aand maybe an r-22 partial. I would have to look.
Rick T.

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roger '40 9n

01-12-2006 19:53:05

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

I found a conversion kit on the net.

Go here:

Link

Roger in Michigan.

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ratropia

01-13-2006 04:02:39

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Re: O.T. Air tank question in reply to roger '40 9n, 01-12-2006 19:53:05

Thanks, boy that might just work!!
Thanks Rick T.

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Pooh Bear

01-12-2006 17:11:54

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

I needed an air tank and I just went to a local truck junkyard and took one off a big truck. Cost was $15. I mounted it on my F350 flatbed truck and plumbed it into an A/C compressor to get compressed air. It was good for about 125psi.
Our first shop air tank was a propane tank.
Used a big refridgerant compressor to get compressed air.

I know a guy that for his first compressor setup he used a refridgerator compressor and a water heater. It was slow to pump up but it worked for him. Kept that water heater pumped up to 100psi.
That was 25+ years ago and yes he is still alive.

Pooh Bear

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old

01-12-2006 21:00:55

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Re: O.T. Air tank question in reply to Pooh Bear, 01-12-2006 17:11:54

Yep water heater tanks work well but need to be looked over real good before you use one. I have one on my truck and its hooked up to a Ford AC compressor, ahs a 150lbs pop off but I don't let it get up that high often and only when I foget to turn it back off. Been useing it for 15 years or so. I also never stand real close to it. I use it mostly to air up tires any more so 50 lbs is about all the more it see any more.

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ratropia

01-12-2006 15:31:59

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

Thanks for all the replies! I will probaly just buy one. I was hoping for a higher pressure rating from the tank. But I think it would be safer and easier to just buy one if all I will get is 150MAX. It's a shame though I have 2 or 3 empty laying around and three full of different refrigerants.

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Rick H. Ga.

01-12-2006 15:06:31

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

Unless the old refrigerant tanks are several years old, the valves have a check valve in them that prevents refilling them. That is why they call them disposable cylinders.

If you can get a hold to an older cylinder, you can make you an air starage tank. I wouldn"t fill them more than 250#.

HTH. Rick

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hvw

01-12-2006 14:03:22

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

On the other if you just need one the Chinese will put it on you for $22.95. Can't build it that cheap.

Chinese air tank

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souNdguy

01-12-2006 12:41:41

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

I agree with the others.. get the fittings to connect them over, and then fill to a reasonable level.. like the portable air tanks you see at auto stores.. 100-120-150 psi max..

Plumb in an air gauge too if you want... shouldn't be much more than making a special hose to get the adapters to work.. Even if you got the hose that went to an old grill.. cut the end off.. used a hose barb to go to something 'normal' for air. I'd especially pay attention to pressure.. and the lower pressure's we mentioned.. etc. I feel ok with 120 psi on a good airline and hose barb with good connector.. but not 400.. or even 200.. etc..

Soundguy

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TIMW(PA)

01-12-2006 12:23:02

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

Like Old said I wouldn't want to trust one over 100 #'s. I personally use a 20 lb propane tank for my portable deal. you might have to find a donor fitting from and old throw away grill to plumb it up , and the newer valves will need taken out and have the flow regulator thing removed but it works great and no worries about it popping on you....

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old

01-12-2006 11:35:51

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Re: O.T. Air tank question in reply to ratropia, 01-12-2006 10:58:50

They did at one time sell a kit to make them in to a portable air tank, don't know if you can still get them or not. Thoses kits had pop offs that popped at around 120psi and my self I wouldn't push them past that.

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Ole Country Boy

01-12-2006 13:42:10

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Re: O.T. Air tank question in reply to old, 01-12-2006 11:35:51

Seen them used. Tell what I used at one time for portable air tank also. Found a used Coke syrup dispenser. Like they use at fountain to make coke. Those suckers are stainless and work great. Seems to me, if memory serves me right that they are rated (stamped) at 300 psi. The two fittings will unscrew and one has a dip tube on it, simply cut that off if you want. I redrilled the screw on fittings them self and put a tire filling brass fitting on one and a simple fitting on the other to attach the hose line to.

Another one we made one kick buctoucks water gun!! on the outlet side attached a plastic hose with a ball point pen end barrel on the hose. In stead of a value we just used the device that they use on IV drips, clamp thingie. Simply remove the large middle opening and put water in. The pressure it up and get after it!! :-)

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