# What is the conversion from R12 to R134a?

## What is the conversion from R12 to R134a?

Calculate how much R134a to use Find the refrigerant capacity for your current system and multiply the R12 charge specification by 0.9 (90%). Then subtract 1/4 (0.25) pound. R134a doesn’t cool as efficiently as R12, so even when properly charged your system won’t cool as well.

## Can you use 134A in place of R12?

Mixing R12 and R-134a refrigerants is illegal, and even if you previously bleed out the R12, the system has to be adjusted to use R-134a, or it will cause leaks, copper corrosion, and lack the lubrication required for optimal operation.

Is R134a higher pressure than R12?

R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak.

Which is better R12 or R134a?

Understand that R12 has its advantages. 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).

### What can I use instead of 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.

### Is R12 colder than R134a?

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).

What pressure does R12 run at?

Registered. R12 should run about 30-35 psi suction for auto AC. R134a is practically the same, but slightly lower – it has a very similar pressure/temperature relationship to R12, especially on the low side.

What is an R12 substitute?

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 you still purchase R12?

Anyone with the required EPA R-12 certification still can buy the 1-pound cans at auto-parts stores, but the cans are kept in the back and guarded like gold.

#### Can R12 still be purchased?

Is it legal for me to sell? Yes, you can still sell R-12 and other CFC refrigerants. Although these refrigerants can no longer be manufactured, it is perfectly legal to sell to an EPA certified buyer.

What is the best replacement for R12 refrigerant?

The best replacement for R12 is considered to be R-134a. The chemical name of R134a is tetrafluoroethane and it chemical formula is CF3CH2F. It is a hydrofluorocarbon (HFC) and has zero ozone depletion causing potential and very low greenhouse effect.

What do I need to convert from R12 to R134a?

Discharge the R12 and recover the R12 for recycling.

• Flush evaporator and condenser with AC flush kit to remove mineral oil
• Flush AC high pressure and suction lines to remove mineral oil
• Empty oil from compressor
• Add specified Ester or PAG oil in the proper viscosity to the compressor,condenser and evaporator.
• ## Can I replace R12 with R134A?

The best replacement for R12 is considered to be R-134a. The chemical name of R134a is tetrafluoroethane and it chemical formula is CF 3CH 2F. It is a hydrofluorocarbon (HFC) and has zero ozone depletion causing potential and very low greenhouse effect.

## How to put R134 into a R12 system?

Recover all R12 and dispose of it correctly.

• Remove all traces of the mineral oil.
• Re-charge the lubricant wit a polyol ester lubricant.
• Replace the expansion device with the appropriate device.
• Evacuate the system and replace the filter drier with a compatible drier.
• Re-charge with R134a to the correct charge by superheat,subcooling and sight glass.
• How to convert R12 to R134a with 7 quick steps?

AC flush kit

• Complete HNBR O-ring kit for your vehicle
• R134a retrofit kit with R-134a port adapters,oi,port caps and retrofit label
• R134a pressure switches
• R134a orifice tube
• New barrier style hoses for pre-1990’s vehicle
• New R134a accumulator/dryer