Ever since 1993 R-134a has been the staple refrigerant for automotive applications. Two are sister refrigerants to R407C, the initial favourite for use in unitary air conditioning systems using different percentages of the HFC refrigerants R134a, R125 and R32. These are R407A – a blend of 40% R134a, 40% R125 and 20% R32 – with a GWP of 1990. The refrigerant charge must be optimized by using the refrigerant’s respective pressure-temperature chart. Re: R134a Vs R404A R134 is designed for what is called high/medium temp jobs such as chillers R404 is for lower temp work ie freezers. R-134a is the most commonly used refrigerant for automotive applications rather it be your twenty year old Toyota Camry or your Kenworth T-200 semi-truck. Before 93 we used R-12 for our vehicles and now, as I write this article in 2018, there is […] If its for "middle east trucks" then look to see what the supply is for these gases in the middle east and what units you … These can offer better energy efficiency and much lower GWP than R404A. that may prevent problems in the future. Looking for low GWP Refrigerant options for R404A, R134a and R422D in existing equipment? Unfortunately, a member of our team did not realize that the compressor was using the R404A, it took the R134A, which we use for our heating, ventilation and air conditioning system to recharge the refrigerant. This means that you can’t optimize the system charge, which can lead to overheating and reduced system efficiency and lifetime. We eliminated the R134A due to a lack of choice of compressors in the power range needed for our applications and an uncertain economic return. But when mixing an alternative refrigerant with R-22, there’s no pressure-temperature chart you can refer to. The sales restriction is established by EPA regulations (40 CFR Part 82, Subpart F) under Section 608 of the Clean Air Act.Only EPA-certified technicians are allowed to purchase ozone-depleting substances (ODS) or non-ozone depleting substitutes used as refrigerants, with limited exceptions. "If you can't fix it, don't break it." Unlike R-134a, HC-12a is completely compatible with the hoses and oils used in R-12 systems, making the conversion much easier to accomplish. Until now there have been three main replacements for R404A. Visit www.climalife.co.uk or call 0117 980 2520. Climalife has published a handy look up table and can offer advice on the most suitable refrigerant for your system. View Profile View Forum Posts View Forum Threads Professional Member Join … Overview. These medium GWP options represent a … For a new plant you have many options that can help you avoid R404A. The HFO (hydrofluoroolefin) R1234yf can be used as drop-in for replacing R134a … Depending on the regulatory limits for the quantity of fluid, the cooling capacity required and the types of compressor used, we decided to use these 4 gases: R290A, R449A, R452A and R404A. If no one can give you the right answer you may want to be safe and retrofit. 02-26-2005, 04:14 PM #3. dorrmann. These fall into 3 main groups: n Medium GWP HFCs such as R134a, R407A, R407F and R410A. Can i replace r134a with r404a 13-08-2008, 03:24 PM #1 Dear All, we had a Danfoss MTZ28-4 compressor for a food teller using R404A. It is the customer’s responsibility to validate the application, and they should carefully consider the requirements and drawbacks when changing from R404A/R507 to R452A in their application. HC-12a, also called ES-12a, OZ-12a, and Hydrocarbon Blend B, is a "drop-in" replacement refrigerant for Freon-12 and to a lesser extent, R-134a.