Can you use R12 gauges for R134a?

They are adapters to go from r12 gauge set to r134a lines. So your r12 gauge set will work on r134a equipped vehicles.

What size are the fittings for R12?

The low-side R12 port is always 1/4″ male flare thread. While the high-side is usually the same size as the low, in certain applications it could be a smaller 3/16″ male flare.

When comparing the fitting of an R12 and R134a system the R134a system has?

R12 can blow 6 to 7 degrees cooler than R134a and is 15% more efficient. R134a systems require larger condensers and higher operating pressures than R12 systems because R134a doesn’t have as high of a heat transfer rate as R12 (which has a heavier molecular size than R134a).

How do you tell if you have R12 or 134a?

To tell if it has been converted you can look for a sticker on the unit under the hood, which would indicate that it is R134a. And you can also look for R134a adapters, which would be located on the charge parts.

How do you convert R12 to R134a?

Take the R12 charge specification and multiply it by 0.9. Then, subtract that result by 0.25 pounds to get the proper amount of R134a charge.

What size are R12 service ports?

1/4 in
6430
Brands ATCO
Female Thread Size 5/16 in.-24
Port Type R12
Port Size 1/4 in
Features Straight

What happens if you put R12 in a R134a system?

R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Bottom line, R134a simply doesn’t cool as well as R12. … R12 systems used mineral oil, but unfortunately mineral oil doesn’t dissolve in R134a. So, along with R134a came a new oil: Polyalkylene Glycol—or PAG oil.

Is R12 still available?

And, as of Jan. 1, worldwide production of R-12 ceased, so the remaining stocks of the refrigerant are limited. That’s one reason for the high cost; the other is a federal “environmental” tax approaching $6 per pound.

What refrigerant is compatible with R12?

R134a
There are three replacement refrigerant options for R12 systems: R134a, R401a, R401b. R134a is regarded, by manufacturers and adherents to the Montreal Protocols alike, as the best replacement refrigerant.

Can 134a and R12 be mixed?

As previously stated, R12 systems usually use mineral oil, which is incompatible with R134a. When R134a comes into contact with mineral oil, it can hinder the oil from returning to the compressor, or possibly reduce heat transfer.

How much does it cost to convert R12 to R134a?

If you have a professional convert the R12 to R134a, you may spend about $250 for the entire service. However, this is much more cost-effective than replacing the entire air conditioning system.

How do you recharge an R12 car?