The new player in the market is HFO-1234yf (R-1234yf), which is considered ozone-friendly and has a GWP of less than 1. The concern that the original R12 hoses would leak R134a like a screen door on a submarine appeared to be largely unfounded, as the insides of original hoses seemed to naturally become impregnated with a combination of refrigerant and oil that acted as a barrier. Refrigerant 134a, or R134a, was developed as an alternative to the CFC refrigerants known to cause environmental damage. The global warming potential of R134a is 1430. Heres R12 vs. R134a pressure chart. There are other EPA-approved refrigerants such as Hot Shot and Freeze 12, which you can find here. And don't forget the high side pressures vary with ambient temperature. Therefore, its most suitable for both commercial and domestic environments. Since 2010, all home AC systems manufactured use a refrigerant like R134a that has zero ozone depletion potential (ODP). The question instead is: Why is the system dead? However, you can convert R12 to R134a by yourself, save money and keep all the tools purchased. 3.5" Backlit Display & Visual Refrigerant Filling Window & High Strength MaterialHVAC digital manifold gauge set adopts 3.5-inch backlight display design,the data is easy to read,and each test result is divided by lines on the screen,the data is more intuitive.HVAC digital gauges is made of high-strength engineering plastic,with anti-slip _________________.
R134a vs R12 - What is the Differences? - Rx Mechanic R12 connectors were of the screw type, while R134a has push-on connectors similar to air tools. Replace the drier with a drier that has a desiccant that is R134a compatible, use new R134a o-rings. The non-flammables can have R22 type gas which is not compatible with most rubber hoses or they have gases that contribute to global warming. These applications will - due to browser restrictions - send data between your browser and our server. Stay home and grill your own steaks and stir your own martini. Because R-12 is no longer manufactured and has not been used in cars for over 20 years, this article will focus on systems designed for R-134a. All refrigeration plants use compressors to compress the gas returning from collecting heat, raise its temperature further, and compress it to facilitate cooling. Start the car again and add R12A to bring the low side pressure to about 32 psi. Country of Origin: United States Hi, this is my first post, so please take it easy on the noob. The issue is that you need to reach the point where the system is functional and leak-free. It has already been clearly stated that R12 is a chemical that damages the earths ozone layer and shouldnt be released into the environment no matter the circumstance. Before R12 was replaced with R134a in 1995, it was mostly used in trucks and cars. But, if your old compressor has lock-up or if your current expansion valve is not functional it would wise to replace the expansion valve with a valve designed for R134a. Theyll continue to work for many years, as replacement is costly. Problem solved, right? As R134a was touted as the replacement for R12, and the conversion of the refrigeration system to run R134a was relatively painless, many commercial installations use this refrigerant. Here are a few of the more common questions. But if you live in a hot climate, want to daily-drive the car, and the car has a tiny-capacity A/C system which, even after modernization, may only perform marginally, you may want to consider sticking with R12. Make sure to wear safety gloves, goggles, and shoes when theres a possibility of exposure to the chemical (R134a). Since you will be using less R134a than R12 you do not want to rely on the driers site glass to determine if the system is full. With R134a you do not rely on the site glass.
134A HVACR versus 134A Automotive..Difference?? - HVAC-Talk: Heating Lets have a closer look at these similarities and differences. On the other hand, R12 has a global warming potential of 10,910. R12 has a global warming potential factor of 2400. See your PT chart. The ozone depletion potential of a chemical is a factor that shows the level of degradation itll cause to the ozone layer that surrounds and secures the earth from harmful radiation. One cant discount its drawbacks, but theres a great deal of knowledge and information available on safely using the product. Most importantly, the oil used in the plant must always be compatible with the refrigerant used. 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. The approval is very legal one, governed by the U.S. EPA. If your car does not have a high pressure cut-out switch in the AC system then youll need to have one installed (call us if you need help). All these industries still have old plants that use these refrigerants. While contained within a refrigeration system, this product is safe to use and poses no risk to the planet. At room temperature R410a has a pressure of nearly 200 psi, while R134a is around 70 psi. Besides R134a there are some other refrigerants that are approved to replace R12 and there is a long list of refrigerants that are not approved. Subtract or 0.25 pounds from this number.
Refrigerants - Pressure vs. Temperature Charts - Engineering ToolBox In large application systems, the vapor density of this refrigerant is usually high. Though you can purchase 12 or 16 ounce cans of R134a from local retailers it is very difficult to measure out the correct amount into your system. As part of doing that, you often wind up replacing major portions of the systemnot because thats strictly required in order to convert it to R134a, but because thats what you need to do in order to get it functional again.
Tech Talk - Differences between R-1234yf and R-134a - FJC Inc The weight is only 2.4 ounces. Its found in domestic and commercial refrigeration and air conditioning. Buy online for free next day delivery or same day pickup at a store near you. R12 was used mainly in domestic and commercial refrigeration, while R134a was used mainly by the automotive industry. Swapping the components isnt a herculean task, but recharging the AC is a challenge. Further production of R12 was banned in some developed countries by the Montreal Protocol because of its harsh effect on the ozone layer. Condensers designed to release greater amounts of heat help to expel the greater amount of heat which R134a removes from the cars interior. 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. You either get a system that will function well with R1234yf or get any other type. If you are replacing other system components, such as condensers, driers or hoses, you may need to add more a/c refrigerant oil to the system. Inhalation of vapor: Inhaling a large amount of R134a vapor can lead to drowsiness, temporary nervous system depression, and lethargy. Lets take you through the advantages, disadvantages, and differences of these two refrigerants a detailed comparison including R12 vs R134a performance. Converting them is extremely expensive, and in many cases, replacement is the only option available. The safe high side pressures are determined with a PT (pressures and temperatures) chart. It belongs to a class of chemicals known as HFCs, and they dont contain chlorine, so R134a doesnt damage the ozone layer. Because the two oils were different, R134a certainly wasnt a drop-in replacement for R12. R134a is a greenhouse gas, while R1234yf has a lower global warming . R12 is otherwise called dichlorodifluoromethane is a colorless gas (chlorofluorocarbon halomethane (CPC) that is used as an aerosol spray propellant and a refrigerant, and is soluble in organic solvents. 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. What is usually sniffed are all the connections in the system: hoses and compressor, condenser, drier, expansion valve and evaporator fittings. Initially, an invasive recipe was proposed: the system should be flushed to remove any traces of the old R12-specific mineral oil, the compressor and expansion valve should be replaced with R134a-specific versions to perform correctly, and the old hoses should be replaced with 134a-specific barrier hoses to forestall leakage. At this time you can still find R12, but, because it is no longer produced, availability is limited to current inventories and the price per pound is greater than R134a.
Amazon.com: Lichamp HVAC R410A Manifold Gauge Set AC R134A, Freon R22 As this product is highly damaging to the environment, the environmental treaty signed in Montreal in 1987 stopped the use of CFC refrigerants, which included R12. International manufacturing of new R12 ceased in 1996, but existing R12 can still be reclaimed and purified. (To be clear, both cars also have a new rotary-style compressor and a big parallel-flow condenser and fan.). It became known as R12 or Freon. 0,008 0,01 0,012 0,014 0,016 0,018 0,02-40 -35 -30 -25 -20 -15 -10 Evaporation Temperature Mass Flow Rate R600a R134a R290 R1270 R32 . In fact, R12 was used for many years as a propellant in a variety of aerosol products and sprayed directly into the air, and it is closely related to the halon used in fire extinguishers. Safety: R134a is safe to use as its non-flammable and cant explode. Diagnosis of the air-conditioning system can be done in the same way as with R134a. Heres some important advice Whenever you notice your R12 refrigerant is leaking, turn off all flames and open the doors so it can escape to the open atmosphere. Bottom line, R134a simply doesnt cool as well as R12. The issue is whether you should. Theyre older generation refrigerants that have some serious environmental factors against them. However, you need calibrated gauges for R410A. Chemistry. When you add fluorescent tracer dye to with the refrigerant oil it helps to track down leaks that push oil out of the system. We suggest dumping the old refrigerant oil in a clean container and inspect the oil for sludge or waxing (old oil that has gelled) and contamination (metal particles). Its better that this is done by professional technicians as venting any of this gas into the atmosphere is environmentally damaging and illegal. Any old black o-rings should be replaced with R134a-compliant green o-rings.
Let's talk about refridgerants: R-12a or R-134a? | TDIClub Forums It also means that rotary, centrifugal, and reciprocating compressors can be used with R12. You can look up the law yourself at www.epa.gov/mvac, but basically it boils down to three things. Find more info about me and HVAC Training 101. The simple answer is you cant. 2021 Complete Guide. The typical scenario here is when the car owner buys an inexpensive retro-fit kit from the local auto parts store. Also, they are mostly used in refrigeration and automotive air conditioning systems.
How To Use An A/C Manifold Gauge Set - CARiD Many older automotive systems still use R12, and as youre still able to purchase individual small cans of this refrigerant via on-line marketplaces, its use in many classic motor vehicles will likely continue. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. A gentleman in Canada was very interested until he learned about the R12. You do not need to replace every o-ring in the system, but if you happen to open a connection that has an o-ring you should replace the old o-ring with one that is compatible with R134a and lubricate the o-ring with ac oil. You do not need to replace the expansion valve in most cases. Pound for pound R134a is a more efficient refrigerant than R12, however it runs at higher pressures in some aspects and therefore requires more effective condensing. Home Air Conditioners R12 vs R134a Refrigerant: What is the Difference? R134a won't provide the same level of cooling as R12, though. Energy usage: R134a is less efficient in cooling compared to R12. It's important to get good. This means that the tiny droplets of oil from the compressor that end up in the refrigerant will be returned via the compressors refrigerant; they wont block pipes. Before we mentioned that you can add approximately 5-6 ounces of ester oil to the compressor. Difference Between R-134a and R-410A Refrigerants? Its still one of the most efficient at cooling, but the destructive effects on the ozone layer and its very high global warming potential have made this environmentally an unwise choice.