It is illegal to vent 134a refrigerant into the atmoshpere. There’s quite a bit to read, but if it is definitely worth your while if you’re interesting learning more about this HFC refrigerant. R134a at 95 degree F should be 50-55 low side and 275-300 high side. Low side <50 lb. With compressor on the initial readings are both low 30/250 and creeps to 27/235 blowing 42 deg F air. This fact sheet goes into anything and everything you’d ever want to know about R-134a. It has been in use since the early 1990’s and now, in 2019, we are beginning to see it’s popularity wane with the rise of the new HFO refrigerant known as R-1234yf. This table represents a pressure temperature chart for R134A. On the other hand, a high pressure gauge should read between 225 psi and 250 psi. HIGH: HIGH: System is overcharged. This pressure relates to the refrigerated box’s highest temperature. R-134a Refrigerant Pressure Temperature Chart. The low side pressure will vary and is not as good for diagnosis as the high side pressure. From a pressure/temperature chart, we see that 31.3 psig is 36 ° F for R-134A. On a fully charged system, insufficient low-side pressure is normally the result of a restriction. The HFO R-1234yf is the refrigerant of the future. Yf was the first HFO refrigerant to see mainstream attention. With the A/C turned OFF - On a cold day the pressure will be low, on a hot day the pressure will be high. Readings that are higher or lower indicate an overcharged system. Two different pressure gauges can be used, either low or high. As an example for a beer cooler: The desired box temperature is 36 ° F; the system is R-134A refrigerant. The pressure was there […] As an air-conditioning refrigerant in newer automobiles, the optimal running pressure for R134A is between 22 and 57 pounds per square inch. According to the U.S. Environmental Protection Agency, R134A is not flammable at ambient temperatures and not corrosive to … A c refrigerant pressure chart for acura acurazine co2 as a refrigerant introduction to transcritical uses of refrigeration low pressure controls diy mercedes ac recharge howto the easy way mb medic what is the suction pressure of an r 134a in a low Ac Pressure Readings Ricks Auto Repair AdvicePennock S Fiero Forum Ac Pressure… Read More » So when or if a problem comes along you want to know the pressure and without a port can quick use a touchless infrared thermos on lines and know the pressure! Forane 134a Pressure Temperature Chart Keywords Forane 134a, R-134a, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gas This R134a refigerant calculator determines the gas pressure based on temperature of R134a refrigerant. R-134a is the most common refrigerant found in automobiles today. A clogged orifice tube is a common cause of such problems. A/C PRO is the easy DIY car A/C repair that saves time & money. For a low pressure gauge, a reading of 25 pounds per square inch (psi)to 40 psi is optimum. It has been in use since the early 1990’s and now, in 2019, we are beginning to see it’s popularity wane with the rise of the new HFO refrigerant known as R-1234yf. This table represents a pressure temperature chart for R134A. Forane 134a Pressure Temperature Chart Keywords Forane 134a, R-134a, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gas