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Getting last bit out of a cylinder of R12

pippo on Wed December 25, 2013 8:48 AM User is offline

Have an old 30 lb (?) cylinder of R12, with maybe 1 lb left- cant be 100% sure as done know the ECACT tare weight of the cylinder- I believe its 9 lbs, thats what a Dupont tech gu told me, but he didnt have a more accurate weight (eg, 9.25lb, etc). I shook the bottle, and felt no "slosh around" weight/noise/etc. But, I just cracked the spigot, and heard a healthy psssssst. So, when youre down that low, is it expected to get ALL of it out and suck it into the car's ac system ?

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Dougflas on Wed December 25, 2013 11:14 AM User is offline

Best way is to put the drum in a 5 gallon pail of hot water.

pippo on Fri December 27, 2013 6:44 PM User is offline

dang, right, Doug!! I just now remembered that from a long while ago, a secret explained in this forum. man, I totally forgot! Thnaks , man!

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pippo on Sun December 29, 2013 10:56 AM User is offline

just thought of it- easier than lugging a few buckets full of hot water outside, cant one place the can in the sun for an hour or 2, not to let it get too hot?? Heat is heat.

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Edited: Sun December 29, 2013 at 10:56 AM by pippo

wptski on Sun December 29, 2013 12:40 PM User is offline

Quote
Originally posted by: pippo
just thought of it- easier than lugging a few buckets full of hot water outside, cant one place the can in the sun for an hour or 2, not to let it get too hot?? Heat is heat.
Get technical and use this!

Dougflas on Mon December 30, 2013 8:03 AM User is offline

You have to realize there are a lot of DYI'ers on this forum and can not justify purchasing all the toys us pros use. The hot water method is inexpensive and easy to use.

wptski on Mon December 30, 2013 10:15 AM User is offline

Quote
Originally posted by: Dougflas
You have to realize there are a lot of DYI'ers on this forum and can not justify purchasing all the toys us pros use. The hot water method is inexpensive and easy to use.
That's true but there are many times the response from some of the Pros here is to have it serviced by a someone that knows what they are doing using the proper equipment. A DIY'r doesn't have to come here to get an answer like that. I don't think answers like that help ACkits sales either.

One my think, if I get the proper equipment, do some research and I can maintain my own vehicles, etc.

pippo on Mon January 06, 2014 5:54 PM User is offline

Well, I appreciate the advice guys, just the same. Your intentions are good. No way I'd spend $$ on such a one time use "blanket", though. You see, like I explained, I have a scant amount of r12 left in the tank- why would I get a blanket? Geez- maybe less than 1/4 lb of R12. Hot water, the sun, or have a few chickens sit on it for a few hours- whatever. It's basically an empty tank. Just was wanting to know how best way to extract the last , almost futile bit out, thats all.

Oh- once Im done with this tank, Im not gonna even deal with r12 anymore..........(I hope, I think)

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wptski on Tue January 07, 2014 9:56 AM User is offline

I just read somewhere that a tank is considered empty when 5% of capacity is reached but then again, what do you do with it then????

pippo on Tue January 07, 2014 6:46 PM User is offline

Wow, wp, I didnt know that!! Guess mine should be considered empty, as geez, Im really down to the last bit. Maybe Im fussing over nothing for sure!! Anyway, will try the sun, or some laying hens maybe, and see what happens. I normally use small cans anyway, blankets wont be of any use.......

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Leggie on Thu March 20, 2014 11:32 PM User is offline

Quote
Originally posted by: wptski
I just read somewhere that a tank is considered empty when 5% of capacity is reached but then again, what do you do with it then????

You recover it with the same recovery machine that was used before you opened up the system. If the tank starts at 30 psig, you should be able to capture 95% or so of whats left.

Quote
Originally posted by: pippo
Wow, wp, I didnt know that!! Guess mine should be considered empty, as geez, Im really down to the last bit. Maybe Im fussing over nothing for sure!! Anyway, will try the sun, or some laying hens maybe, and see what happens. I normally use small cans anyway, blankets wont be of any use.......

That's non-sense unless he's stuck in how he was taught in the 1980s or earlier. Heating it will increase pressure substantially as long as you have liquid remaining but the expansion is minimal once its gas.

wptski on Fri March 21, 2014 8:47 AM User is offline

Quote
Originally posted by: Leggie
Quote
Originally posted by:
That's non-sense unless he's stuck in how he was taught in the 1980s or earlier. Heating it will increase pressure substantially as long as you have liquid remaining but the expansion is minimal once its gas.

I'm not formally schooled on this topic! Anything learned is from forum like this and you know what they say, "If you read it on the internet, it's got to be true". Just go on YouTube and you'll see guys with company patches on their shirts that don't even know how to properly purge air from a hose.

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