R12 to 134 conversion

[Don H.]

Re: R12 to 134 conversion

My experience was 134 performed significantly worse than R-12 in a system designed for R-12 (after flushing and using the correct oil). It works fine when used in a 134 system like new cars. The systems are different. Don H.

[Duke W.]

Re: R12 to 134 conversion

Duke,
Weren't there legalities attached to the use of R12?

Dom

IIRC the manufacture of R12 was banned by an international treaty that was signed by most nations. So it became illegal to manufacture R12 after a particular date, but it's not illegal to use existing supplies as long as it's properly handled.

That's why you need a license to buy and handle R12.

Duke

[Michael J.]

Re: R12 to 134 conversion

IIRC the manufacture of R12 was banned by an international treaty that was signed by most nations. So it became illegal to manufacture R12 after a particular date, but it's not illegal to use existing supplies as long as it's properly handled.

That's why you need a license to buy and handle R12.

Duke

Actually, you can buy it on eBay, but you have to either have the license or sign an affidavit that you will only allow a licensed R-12 installation person to use it……..

http://www.ebay.com/itm/4-Cans-IG-LO-Igloo-Du-Pont-Freon-12-Refrigerant-Automobile-R-12-/321538798765?pt=Motors_Car_Truck_Parts_Accessories&hash=item4add34b4ad&vxp=mtr

[Duke W.]

Re: R12 to 134 conversion

"Remember, the cooling is just a chemical reaction."

No chemical reaction is involved. The freon simply goes through phase changes - liquid to gas in the evaporator and gas to liquid in the condenser - the basic (thermodynamic) refrigeration cycle.

Duke

[Domenic T.]

Re: R12 to 134 conversion

Absolutly correct.
Evaporation..

DOM

[Leif A.]

Re: R12 to 134 conversion

Monte,

Thanks for taking the time to demystify the A/C system...at least a little bit. That's one area I have always left to the
"pros". But, who knows, maybe next spring I'll attempt to service mine myself...don't think I could screw it up to badly.

Leif

[Tom L.]

Re: R12 to 134 conversion

One last thing Monte, Nitrogen in it's liquid state will probably make the oil so viscous that it won't move too well. Nitrogen gas is not miscible with refrigerant oil and also will not push all the oil out, that only uses pressure as a means of removal. Back in the day we used R11 to clean lines which is an amazing solvent and it miscible with mineral oil and did a wonderful job of cleaning refrigerant lines. Unfortunately the government decided that it's a bad idea, another story all together. There are other chemicals that do a great job as well but they are expensive. Here's a link: http://www.nucalgon.com/products/tsp/rx11-flush Oh, and one other comment about licensing, the purchase of all refrigerants requires a license other than those sold in small cans. Larger quantities, 30 lb. cylinders, are not so expensive, especially 134a, which is quite inexpensive : )