The advantage of ester oil is that it works with both R12 as well as R134a, so you can fill the system with it and then use either refrigerant.Sha. However, its been shown that R134a is as destructive to the environment, and newer refrigerants have been created to overcome this problem. You can spend interesting evenings going down the rabbit hole online and reading posts from folks who vigorously defend flammable refrigerants and say, You do know that your car carries 20 gallons of flammable gasoline, dont you? Yes, but gasoline usually isnt routed through the passenger compartment, and theres a zero-tolerance policy toward gasoline leakage. 1. The major difference between these two refrigerants is their chemical composition. R134a reacts with water to form hydrofluoric acid which damages the internal A/C components. The manufacture and sale of the small cans of R12 used by hobbyists to top off a system also ended, although New Old Stock (NOS) cans of R12 are still privately traded on eBay and Craigslist (Ill come back to that). The simple answer is you cant. The symbol implies that R12 is a composite of carbon, chlorine, and fluorine. Theres no problem with using R134a in a home air conditioning system because it is a hydrofluorocarbon that doesnt cause environmental harm. R134a was developed to replace R12, so it works over the same range of applications. Low refrigerating effect per pound: In comparison to other refrigerants, the refrigerating effect of R12 per pound is low. Osuagwu Solomon is a certified mechanic with over a decade of experience in the mechanic garage, and he has over five years of experience in the writing industry. This means when lowering temperatures to -7C or below, theres a noticeable drop in the plants ability to chill the air. If you still find it difficult to use R134a in a home AC system, you can check out a comparison of R12 vs R134a fittings to know the refrigerant that best fits the AC system. Both of these products are refrigerants. R12s boiling point is -21.6F or -29.8C. R-12 and R-134a use different size fittings in order to avoid mixing the two types of refrigerant. You can get it and use it. But the problem with R12 is twofold. The question instead is: Why is the system dead? Also, it can be used with all types of compressors. SKU # 532244. . Therefore, the R12 refrigerant is illegal, and emitting it is illegal. However, it must be noted that itll disintegrate into toxic compounds when exposed to flame. Bottom line, R134a simply doesn't cool as well as R12. Concentration level: The R134a vapor dilutes the oxygen concentration in the air to a low level, thereby causing harm. All these industries still have old plants that use these refrigerants. Country of Origin: United States Hi, this is my first post, so please take it easy on the noob. Servicing: When payment of any kind is involved (including non-monetary), any person working on an MVAC system must be certified under section 609 of the Clean Air Act (CAA) and they must use approved refrigerant handling equipment. Now, in the case of big American cars, with their massively overbuilt A/C systems and huge condensers, R134a conversion often worked fine. After the system has been tested out it should be checked for leaks. R12 uses mineral oil, but R134a wont dissolve in mineral oil. To bless the system the technician should attach a R134a sticker somewhere in the engine compartment to note the car is using R134a. So as long as the system was functioning correctly and not leaking, it appeared that you could flush the system of any old oil, change the oil in the compressor to PAG or ester oil, replace only the receiver-drier and the o-rings, screw on the charging port adapters, evacuate the system, and recharge it with the new R134a, using about 80% as much as the original R12 volume. If the oil didnt dissolve into the refrigerant, it would reduce the refrigerants ability to transfer heat. In addition, there is a $10,000 rat-out fee your neighbor can collect if youre venting refrigerant and he tattles on you. There are many thousands of older air conditioning and refrigeration plants that use these refrigerants. 134A HVACR versus 134A Automotive..Difference?? - HVAC-Talk: Heating R12 costs about 4 times as much as R134a. Both of these refrigerants wont be used in new air conditioning or refrigeration plants, but theyll continue to be used in existing plants and the automotive industry. On a long-dormant system, the odds are very high that its dead because it has no refrigerant in it, which means it has leaked out which means theres a leak that must be located and fixed. Difference Between R-134a and R-410A Refrigerants? Id already decided to, effectively, replace every major component, only re-using the hard aluminum lines and custom fittings on the soft compressor lines. That doesnt mean to say that theyre no longer used. With R134a you do not rely on the site glass. The major reason for the replacement of R12 with R134a was to curb future greenhouse effects. Its likely that these plants, which will be expensive to convert, will continue to use R12 with careful maintenance. Swapping the components isnt a herculean task, but recharging the AC is a challenge. Disconnect the two hose lines to the compressor, protect the ends from getting dirty. Can you use r12 gauges for r134a? - Sage-Advices Next, add a can of R12a from the low side fitting while running your A/C. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. It also means that rotary, centrifugal, and reciprocating compressors can be used with R12. In contrast, the most likely reason youd consider recharging with an alternative refrigerant is because the refrigerant leaked out of your car and youre trying to avoid doing a full-on A/C rejuvenation which includes finding the leak and properly changing refrigerants. Sold by e7tools and ships from Amazon Fulfillment. R-134a vs R-1234yf: What's the difference and how to - YouTube R12 is used in several applications like low temperature, medium temperature, and high-temperature applications. We consider the the various types alternative refrigerants that are illegal or not approved to be in two sectors: non-flammables and flammables. Can I mix R134 and R12a? - RedFlagDeals.com Forums A significant investment. R12 contains a chemical called chlorine that destroys the ozone layer, thereby causing potential environmental risk. By using a black light the dye will glow in areas where oil leaks are visible. The molecule size of R134a is smaller than that of R12, so there was concern that R134a could leak out through the hoses and flare fittings that R12 systems used. Besides, R134a refrigerant was manufactured after R12 was banned to help reduce the harshness of the old chemical (R12) on the ozone layer. A qualified technician should vacuum out the gas and the refrigerant changed for something more modern and environmentally sympathetic. R12 has an ODP of 1, meaning that it has the highest potential to destroy the ozone layer. The service ports in both systems are quick-connect, but they are taller in the yf systems to avoid cross-contamination. _________________. R12 has not be manufactured for a long time it was outlawed in the US. The best replacement for R134a is R1234yf, while R12 refrigerant replacement was R134a. R134a is the most widely accepted alternative automotive refrigerant used to replace R12. On this website we are addressing only R134a and not other suggested drop in replacements. I can tell you that R12 is some seriously great refrigerant; it gets both of these cars meat-locker cold almost from the instant the A/C is turned on. However, leaks do occur. Also worth noting is that the R-600a requires a shorter time to reach -21C (60 minutes) compared to the R-134a (135 minutes) [1]. No, its not possible to mix these two refrigerants. Pressure Temperature Table If it is adjustable there will be an adjustment screw between the two terminals. SureBilt R-134a High and Low Side Service Port Repair Kit $ 5. The problem with using an approved alternative refrigerants other than R134a is that when the system is serviced it requires certain types of fittings, labels and dedicated equipment. Just leave it alone for now. R134a is safe to use as its not toxic, flammable, or explosive. 29. Providing they dont leak, theyre no risk to the environment. Miscibility with oil: R12 can be mixed with the compressor oil no matter the operating condition. Gauges are used to read the pressure of various liquids and gases in a cooling system, as well as vacuum pressure in the process of testing or charging the device. Here are the basics for converting a system that does not have a charge of R12, its empty. The molecule size of R134a is smaller than that of R12, so there was concern that R134a could leak out through the hoses and flare fittings that R12 systems used. Part # LX-14. An R134a-specific expansion valve was preferred but not strictly necessary. R134a is used in many applications such as: Although this type is better than R12, using this kind of refrigerant also has some problems associated with it. The value of carbon dioxide is 1. However, you need calibrated gauges for R410A. Yes R12 systems did cool better than R134a, but there are differences and it is not wise to go back wards. Hence, the effect of R12 on global warming is up to 10,000 times higher than carbon dioxide. Important Features: Color-coded Easy to use Made of high-quality brass Specific for R-134a Pros: Easy to operate. Let's talk about refridgerants: R-12a or R-134a? | TDIClub Forums Its a safe product for use in a variety of domestic and commercial environments. And that brings us to, I continue to use R12 in two of my carsmy 1972 BMW 2002tii and 1973 Bavaria. As this chemical has carbon, hydrogen, and fluorine but no chlorine, its not dangerous to the ozone layer. Before R12 was replaced with R134a in 1995, it was mostly used in trucks and cars. A/C professionals derisively called these death kits because they had a reputation for causing the compressor to seize a few months later. This chemical has carbon, hydrogen, and fluorine. This product does contain dangerous chemicals such as methyl chloride and vinyl chloride, both of which are carcinogenic and may cause congenital disabilities.
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