No. R12 systems are designed for R12. The lubricating oil for 134a is synthetic and will attack the o-rings in a R12 system. I think the operating pressures are also different.Samething is now happening to residential ACs. R22 is out and 410 is in.They are not compatible.SOL
The pressures depend on the temperatures so it is not possible to give "normal" temperatures. The pressures change with the outdoor and indoor temperatures. You need to be EPA certified to attach gauges to the unit to check the pressures.
450 psi / 35 psi
You have to have a permit to buy R12 and it is very expensive. Any system that uses R12 can use 134 the replacement for R12. You will need adapters that screw onto the old fittings that accept the hose that hooks to the 134 can. You add freon to the low side of the system. The adapter are different sizes so you cannot put it in the high pressure side. Yes, if you have any mechanical knowledge at all, you should be able to charge the system without much trouble. OR you can buy all the R12 you like for cheap from Mexican sources and keep the longevity of your original equipment and lower operating pressures of R12. They way your system was designed. R12 comes in everyday by the truckload thanks to our new open border laws.
No it's not. R22 is designed for use in home HVAC systems where as R12 is intended for automotive systems. Using R22 in an automobile will cause swelling of seals and hoses, possible compressor failure due to different running pressures.
No it's not. R22 is designed for use in home HVAC systems where as R12 is intended for automotive systems. Using R22 in an automobile will cause swelling of seals and hoses, possible compressor failure due to different running pressures.
SAMMI shows 357 operating at higher pressures
the normal operating temperature for cars is around 190 degrees.
Oxygen IS a gas at normal temperatures and pressures
what is normal operating temp.
Tantalum (sometimes called Columbium in the US) is solid at normal temperatures and pressures.
When retrofitting a system with R134a refrigerant that was originally R12, it usually takes just a little less R134a than the original R12 did. Look for the sticker in the engine compartment or consult the owners manual for the original amount of R12 the system took. Then recharge with a few ounces less of the R134a. Also monitor the pressures during the process for reference.