difference between r12 and r134a gauges

Then there are three new EPA-approved climate-friendly alternatives. There is R1234yf, which is already being used on new cars but is classified as mildly flammable. At $70 per pound, no one is using it in retrofit applications. R134a is not an ozone-destroying agent, but it is a greenhouse gas, and is illegal to vent as well. Servicing automotive a/c systems: The difference between R-134a and R On this website we are addressing only R134a and not other suggested drop in replacements. For instance you can evacuate FRIGC FR-12 into a refrigerant recovery bottle that has R134a in it or visa versa. R-600a vs. R-134a: Which Is The Better Refrigerant? Besides, its technology has been tested and trusted. At room temperature R410a has a pressure of nearly 200 psi, while R134a is around 70 psi. These two refrigerants are very similar. Generally the system will be initially charged with approximately 80% to 85% of the original amount of R12, using R134a. Best for varieties of operating conditions: Its boiling point is -21.6 Celsius. R134a was developed to replace R12, so it works over the same range of applications. Generally this works well for the whole system. Its cylinders are colored white. This makes it expensive to purchase and adds to the attraction of replacing it with other greener products. They might say for instance, add 3-4 oz of oil to the compressor, 1 oz of oil for when you replace a drier, 2 oz oil for the evaporator and so on. When this happens, the chlorine in the product contributes significantly to the ozone layers depletion, leading to a lack of protection from harmful radiation. R134a A/C retrofit and low pressure cycling switch adjustment . R12 is found in all kinds of refrigeration, ice makers, air conditioners, water coolers, transport refrigeration, and chillers. I think that, with hindsight, many people would agree that, even given that R12 is an ozone-destroying agent, fines of this level made many hard-working A/C technicians hostile to the government, and thus were counterproductive. You might find that the system doesn't get as cool even after properly charging it. Converting them is extremely expensive, and in many cases, replacement is the only option available. Lastly, there are the flammable organic refrigerants (propane and its blends). Theyre older generation refrigerants that have some serious environmental factors against them. R134a has a smaller molecule than R12 so R134a will leak out sooner than R12. The alternator, sometimes called a generator, generates electricity to charge the battery and power all the electric auxiliaries while driving. Any old black o-rings should be replaced with R134a-compliant green o-rings. Also, R134a cylinders are light-blue in color. Theres a lot of misinformation surrounding R12. That doesnt mean to say that theyre no longer used. What Happens If You Put R134a in an R12 System? - techtown 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. Further production of R12 was banned in some developed countries by the Montreal Protocol because of its harsh effect on the ozone layer. 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. The conversion to more modern refrigerants will require a replacement of the system, which will cause issues in terms of originality when showing this type of vehicle. 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 . Required fields are marked *. Attach the R134a charge port adaptors, there are two types.. one of which you need to remove the old R12 valve cores. Country of Origin: United States Hi, this is my first post, so please take it easy on the noob. A simple rule of thumb conversion would be to take the amount of R12 refrigerant your system requires, in pounds, and multiply by 0.9 (your answer should be 90% of the R12 value). Below are the major differences between R134a and R12: The chemical composition of R12 and R134a differ. R12 was used mainly in domestic and commercial refrigeration, while R134a was used mainly by the automotive industry. Low refrigerating effect per pound: In comparison to other refrigerants, the refrigerating effect of R12 per pound is low. Amazon.com: Lichamp HVAC R410A Manifold Gauge Set AC R134A, Freon R22 R134a belongs to the family of HFCs or hydrofluorocarbons. 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. PDF A Comparison Between Refrigerants Used In Air Conditioning Unfortunately, the R12 refrigerant doesnt always blow cold air. Safety: R134a is safe to use as its non-flammable and cant explode. All signatories to the Montreal Treaty stopped the production of CFC products. 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. R134a is the most widely accepted alternative automotive refrigerant used to replace R12. R134a wont damage the earths ozone layer. Bottom line, R134a simply doesnt cool as well as R12. NOTICE: All images, artwork, text & copy on this site and page are legally protected and are not to be reproduced or distributed without prior written consent of Griffiths Technical Inc.Porsche is a registered trademark of Dr. Ing. R-134a entirely dominated the automotive market by 1994. The money you will save by will pay for the R12. Its called Polyol Ester Oil or POE oil. h. c. F. Porsche AG. Can you use r12 gauges for r134a? - Sage-Advices 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. But some types of PAG do not mix well with the old residual R12 mineral oil left in the system components whereas ester does mix very well. It is a haloalkane and hydrofluorocarbon (HFC) refrigerant that has thermodynamic properties, potential global warming for one hundred years, and insignificant ozone depletion. How to Convert Your Car AC R12 System to R134a All leaks in systems using R134a must be repaired within 30 days. From this number, subtract 1/4, or 0.25 pounds. Anyway on the low side R134a runs about 2 psi lower than R12 at equivalent temperatures. Note that there is another kind of oil called Polyol Ester Oil (POE). Thus, R-600a is more efficient than R-134a. Lets take you through the advantages, disadvantages, and differences of these two refrigerants a detailed comparison including R12 vs R134a performance. Refrigerant: Must be EPA-approved and cannot be intentionally released (vented) into the environment. But, if your car lacks enough condenser and you have many 100+ degree days then you may want to stick either increase air flow, add another condenser as we mentioned in The Mr. Ice Project or stick with R12. It's important to get good. This gas is then cooled via environmental means, and the gas slowly loses heat and reverts to a liquid state. A comparison between R12 vs. R134a temperature will show that R12 has a higher temperature than R134a. R134a refrigerant is lighter than R12. If youre still uncertain, go to a trained technician wholl tell you what refrigeration you have. No, its not possible to mix these two refrigerants. Google use cookies for serving our ads and handling visitor statistics. R134a is an HFC or tetrafluoroethane, and its chemical formula is CH2FCF3. This is an electronic tool that sucks in air through a tube and across a sensor. But the problem with R12 is twofold. There should also be a blue sticker somewhere on the system telling you the date the system was converted. This means that it has a high potential of causing depletion to the ozone layer. If your a/c system is empty/low on refrigerant, if your system has a leak or if you need to open the system, then now is the time to decide which refrigerant you want to use. Get it as soon as Thursday, Apr 20. Using the specs for the current system, multiply the R12 charge by 0.9 or 90% to determine the refrigerant capacity. If the target environment is only moderately hot, and your use of the car is light, R134a will probably be fine. However, you will need different recovery machines and other equipment to handle R1234yf. You can order a personally inscribed copy here. Refrigerant for domestic & commercial use, Mainly used in the automotive industry but can be used as a refrigerant for domestic and commercial use, Has excellent cooling properties and performs at a similar level to R134A, Has excellent cooling properties and performs at a similar level to R12. Which brings us to. R134a is a newer type of refrigerant that has some significant advantages. 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. How To Use An A/C Manifold Gauge Set - CARiD R134a vs R12 - What is the Differences? - Rx Mechanic If your vehicle is after 1994, you could use R-134a in its air conditioning system. 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. By using a qualified a/c shop with the proper equipment you odds are in your favor of having the job done correctly the first time. R22, or to give it its proper chemical name, chlorodifluoromethane (CHCIF), is a colorless, odorless, non-toxic, non-flammable alternative to older refrigerants. Technicians must capture and recycle R134a safely, and the gas must be disposed of by following the EPA guidelines. The biggest giveaway is the air conditioning connectors. While R513A is a viable option for new and existing equipment, it is not a "drop- in" replacement for R12 or R134a. Moreso, it had been banned. Its not that difficult but the procedures of evacuation, charging and testing should be done by a licensed a/c technician that is experienced with R134a and your particular car. Small NOS cans of R12 are widely available on eBay and Craigslist for about $30 apiece. SKU # 532244. . Quote Minuit Members 5.1k Diagnosis of the air-conditioning system can be done in the same way as with R134a. Its better that this is done by professional technicians as venting any of this gas into the atmosphere is environmentally damaging and illegal. In addition to it having a low ODP, science has proven that R22 is also a strong greenhouse gas and has a GWP of 1810, indicating that its 1810 times more powerful than carbon dioxide in contributing to global warming. If you have a perfectly operating system using R12 you do not have to drop what you are doing and convert to R134a. Because this recipe was quite expensive, a backlash developed which gave companies an opportunity to sell conversion kits consisting of nothing but the charging port adapters and a small bottle of oil that was somehow magically supposed to make your mineral oil R134a-compatible. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. dye and seal. R12 will completely dissolve in mineral oil, but R134a wont. Its often said that R12 is no longer available. You can recharge your A/C system with chicken soup (lousy refrigerant, by the way) and no black helicopters will come to your house, but in a world where people usually dont hold onto their cars forever, R134a is still the best choice for retrofit applications. Since these days a can of R134a is about $15, the cost differential isnt what it was in the panicked days of the mid-1990s. Most of all the differences gravitate to longevity, functionality, and safety. In addition, there is a $10,000 rat-out fee your neighbor can collect if youre venting refrigerant and he tattles on you. Weve been talking about air conditioning for a couple of weeks now, so if youre still feeling the heat then its time to wrap up the series so you can get out to your garage and put what youve learned to good use. Nevertheless, if your application is configured only for R12, then you can use it or consider replacing the applications engine. You can then add ester oil thatll work with either R12 or R134a. R134a and R12 are both refrigerants used in vehicle air conditioning systems. 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.

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