Re: [DML] R12A

["therealdmcvegas" <dmcvegas@xxxxxxx>]

It's probably not.

There are allot of *replacement* refridgerants on the market. But 
many not not acceptable by the EPA for use in automobiles. But are 
available for sale thru loopholes.

You *alternative* refridgerants fall into 3 basic catergories:
1. Blend of non-automotive approved refridgerants.
2. Use illegal Hydro-Carbon blends. Ie. Propane, butane, etc.
3. Straight lie, and contact R-12.

When it comes to HVAC restoration or retrofitting, the EPA's website 
is always a great place to start.

http://www.epa.gov/ozone/snap/refrigerants/macssubs.html

Now, here is something vital to know about the main difference 
between R-12 & R-134a. The R-134a molecules are ALLOT smaller than 
the R-12 ones. So, the old hoses on your system are not the best idea 
for them, because just like a rubber balloon slowly deflates as the 
pressurized gas inside leaks out the membrane of the balloon, so will 
R-134a leak out of your old rubber R-12 hoses.

Your modern A/C systems utilize Barrier Hoses, rather than just the 
traditional rubber ones. Barrier hoses has a neoprene tube inside the 
rubber, so that the R-134a cannot bleed out.

Now, something to keep in mind here is that non-automotive 
refridgerants, such as R-22 are used as a part of the blend for many 
R-12 alternatives, such as "Freeze-12". Per EPA guidelines, R-22 has 
simular properties to R-134a, and must be used in conjunction with 
barrier hoses. Otherwise, if you just inject Freeze-12 or simular 
refridgerants into your stock R-12 system, you need to realize that 
WILL LEAK OUT eventually, and you A/C will fail once again. Where as 
R-12 will last many years more.

So when dealing with R-12 A/C systems on automobiles, you really only 
have two choices to insure long-term reliability:
1. Repair the defects, and restore the system back to R-12
2. Retrofit the entire system, and use R-134a.

-Robert
vin 6585 "X"



--- In dmcnews@xxxxxxxxxxxxxxx, "robert parker" <roberthparker@xxxx> 
wrote:
> 
> How is this different from "Freeze 12"? (a Johnsen product)    I 
understand 
> this, too, is compatible with R-12, and I paid $3/can for them.    
Stay 
> cool.      Drive Stainless     Robert   VIN 6924
> 
> From: "thebrave65" <ssawyer37@xxxx>
> Reply-To: dmcnews@xxxxxxxxxxxxxxx
> To: dmcnews@xxxxxxxxxxxxxxx
> Subject: [DML] R12A
> Date: Thu, 17 Mar 2005 23:54:38 -0000
> 
> 
> 
> 
> I've been hearing that R12A is a good replacement for R12.  From
> what I understand, is has a lower boiling point, takes less per
> pound, is colder, mixes with R12 and is bio-friendly.








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