difference between r12 and r134a gauges

As this gas has such an effect on the environment, the EPA (Environmental Protection Agency) has strict guidelines for its use. Below are the major differences between R134a and R12: The chemical composition of R12 and R134a differ. Low refrigerating effect per pound: In comparison to other refrigerants, the refrigerating effect of R12 per pound is low. This ability has encouraged R12 in a wide variety of applications and over a wide range of temperature variables. Its cylinders are colored white. There should also be a blue sticker somewhere on the system telling you the date the system was converted. The most common influences which effect the capability of R134a to perform well are the condenser, in some cases the the superheat setting of the expansion valve or the amount of R134a. This product is non-toxic, non-flammable, and not explosive, so its extremely safe to use for domestic refrigeration. These efforts to balance the system can not be realized if there are problems within the a/c system, such as: poor performing compressor, dirty condenser or poor air flow through the condenser, malfunctioning expansion valve, water or air in the system, improperly operating fresh air or heat input in the climate-air mixing system. Safety: R134a is safe to use as its non-flammable and cant explode. After the initial charge the system is then tweeked : you determine the optimum amount of refrigerant to match your system by monitoring the a/c outlet vent temperature and the high side pressure as you add or remove refrigerant. In the years following the switch to R134a, there was confusion over what was required to maintain the A/C of older cars. 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. And don't forget the high side pressures vary with ambient temperature. Google use cookies for serving our ads and handling visitor statistics. 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). This item: R12 R22 R134a R404a Manifold Gauge Set 3" Gauge HVAC A/C Refrigeration Charging Service. Failure to abide by the EPA regulations can result in expensive fines for either you or your service technician. The service ports in both systems are quick-connect, but they are taller in the yf systems to avoid cross-contamination. Im not a lawyer, but charging a known-leaky system with something flammable sounds like culpable negligence to me. Subtract or 0.25 pounds from this number. If it splashes inside the eye, it could lead to a serious eye problem. Rxmechanic.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon.com. Sold by e7tools and ships from Amazon Fulfillment. Recharge the compressor with a/c ester oil and a tracer dye. By international agreement in 1987 (the Montreal Protocol), the use and production of CFCs such as R12 began to be phased out, with automobile manufacturers required to stop using it by the end of the 1994 model year. ZENY 3,5CFM Single-Stage 5 Pa Rotary Vane Economy Vacuum Pump 3 CFM 1/4HP Air Conditioner Refrigerant HVAC Air Tool R410a 1/4" Flare Inlet . With the differences between the two refrigerants in mind, it goes without saying that charging an R12 system with R134a can have some serious negative effects. Also, R134a cylinders are light-blue in color. Compatible with multiple applications: The major reason for the introduction of R134a was to replace R12, so it functions perfectly in the same range of applications like rotary, screw, and centrifugal compressors for air conditioning and refrigeration. This can be very very expensive. R12 is known as a CFC or chlorofluorocarbon, with a chemical symbol of CCl2F2. Anyone selling R12 is required to verify that the buyer has an EPA Section 609 certification to work with mobile vehicle air conditioning (MVAC) systems. You can find many videos and web forum posts where people retrofit R152a into cars that originally had R12 and profess excellent results, but it is not approved by the EPA for retrofit applications, only new car applications. So if you car has a large amount of rubber hose, such as a 40 feet with the 911, then you will be re-charging the system often and that is expensive no matter which refrigerant you use. For example, while R12 itself is similar to the halon used in fire extinguishers, when R12 is mixed with mineral oilthe most commonly-used lubricant oil in R12 systemsand aerosolized and burned, it creates phosgene gas, which was used as a chemical agent in WWI. When used in refrigerator and A/C systems, R12 cooled incredibly well. R12 will completely dissolve in mineral oil, but R134a wont. This should give you a rough idea of how much youll need. dye and seal. 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. It provided much needed context as I embark on re-building the AC in my sons new (to him) 1988 Toyota pickup. These applications will - due to browser restrictions - send data between your browser and our server. We consider the the various types alternative refrigerants that are illegal or not approved to be in two sectors: non-flammables and flammables. So when someone says, You cant get R12 anymore, or Its illegal to use R12, those things simply arent true. Versus Ferrari F8 & Lamborghini Huracan Evo Cammisas Ultimate Drag Race Replay, Ultra RARE: Colin Chapmans Lotus Eleven + 327 Corvette Stingray with 4-speed | Barn Find Hunter Ep. 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. As this chemical has carbon, hydrogen, and fluorine but no chlorine, its not dangerous to the ozone layer. Theres a lot of misinformation surrounding R12. R12 is known as a CFC or chlorofluorocarbon, with a chemical symbol of CCl2F2. Piston Slap: Booting a Torino in a snap without snaps? Usually, mechanics charge around $200 for conversion. R134a isnt toxic, corrosive, explosive, or flammable, making it a good choice for air conditioning, but its cooling properties arent as good as R12. Not so fast. The global warming potential of R134a is 1430. Thus you see how R134a conversion was often applied to systems that were not working correctly, if they were working at all. Additionally, R134a was introduced as a replacement for R22 and R12 in high and medium-temperature refrigeration systems like domestic and commercial chillers. . A/C professionals derisively called these death kits because they had a reputation for causing the compressor to seize a few months later. Your decision could be made based on economics, environmental concerns, or both. There is R744, which is literally carbon dioxide (CO2). Note that I am not advocating taking the exam and getting the EPA 609 certification simply so you can legally buy R12; Im just stating what the law appears to be. And with R134a costing only two bucks a can, converting to the new inexpensive refrigerant seemed the thing to do. First, it is a pernicious ozone-destroying agent, so if you are going to use it in a car, you are morally required to do everything under the sun to thoroughly leak-test the system before charging it with R12. If youre resurrecting the A/C in a vintage car, the vast majority of the time the refrigerant has long since leaked out, but if your car has refrigerant in it, and you need to open up the A/C system to work on it, spend a little money and take the car to an A/C shop. However, you can convert R12 to R134a by yourself, save money and keep all the tools purchased. All leaks in systems using R134a must be repaired within 30 days. R134a wont damage the earths ozone layer. R134a has a boiling point of -14.9 degrees Fahrenheit, whereas R410 boils at -61.9 degrees. This means when lowering temperatures to -7C or below, theres a noticeable drop in the plants ability to chill the air. The exact amount will vary with each car. The next piece of equipment to track down leaks is a leak sniffer. Moreso, it had been banned. Its been used in the refrigeration industry for a long time, so theres a large body of knowledge established around the product. Certainly no one selling cans of R12 on Craigslist is asking for your EPA 609 card. Hand in hand with this is the global warming potential (GWP), which measures the gass potential as a greenhouse gas. The air conditioning system in your car uses a combination of evaporation and condensation to cool the interior. The typical scenario here is when the car owner buys an inexpensive retro-fit kit from the local auto parts store. Quote Minuit Members 5.1k This implies that the discharge pressure of the compressor should be moderate so it can produce the refrigerants condensation in the condenser at the atmospheric temperature. Merely an emerging auto hacker. As long as the compressor was working well, it could be drained, filled with R134a-compatible oil, and reused. Many existing fridges and air conditioning units still use this refrigerant and work very efficiently. The value of carbon dioxide is 1. While R513A is a viable option for new and existing equipment, it is not a "drop- in" replacement for R12 or R134a. This means that its classified as a greenhouse gas and will add to the current problems of heat not escaping the earths atmosphere. The compressors used by refrigeration plants to compress gas require oil to help lubricate its moving parts. R12 was used mainly in domestic and commercial refrigeration, while R134a was used mainly by the automotive industry. We, the Rxmechanic team, have presented a well-detailed comparison of R134a vs. R12. Thats not the case with R12, ensuring that the efficiency of the plant isnt compromised. The most significant disadvantage of this product is the damage that it can do to the environment if its vented irresponsibly. However, it must be noted that itll disintegrate into toxic compounds when exposed to flame. In the last 10 years, new information has shown that this gas contributes to global warming. However, some old air conditioning units still use them. Required fields are marked *. R134a replaced R12 from 1994 onwards. Stability: RR12 doesnt disintegrate even under extreme operating conditions. The alternator, sometimes called a generator, generates electricity to charge the battery and power all the electric auxiliaries while driving. Tiny amounts of oil will inevitably find their way into the stream of gas. 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. The problem was that there was not agreement on exactly what was required for the conversion. Also, the EPA 609 certification can be easily obtained by taking an online exam. This is used in automotive air conditioning in older vehicles and domestic and commercial air conditioning and refrigeration.

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