difference between r12 and r134a gauges
R12 cars used mostly 1/4 flare service ports just like stationary stuff, with some exceptions like some having a 3/16 flare high side port. R12 contains CFCs like hairspray once did, that is potentially damaging to the ozone layer. New hoses are called "barrier" hoses. The composition of R450A is 58% R1234ze and 42% R134a. (2011). R134a and R12 exhibit similar performance characteristics as refrigerants, with R12 showing a slight advantage. Answer: They are adapters to go from r12 gauge set to r134a lines. R134a R134a refrigerant was developed to replace R12 in automotive air conditioning systems. R134a has The money you will save by will pay for the R12”.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”. The main difference between the two is that R12 is the amount of time they remain in earth’s atmosphere, with the newer 134a significantly less than the old R12. If you're getting a R134a compressor, might as well finish the job - replace the receiver/dryer, flush everything else, and convert to R134a anyhow. There are significant differences between R12, R134a, and R513A, which must be considered when handling, processing, applying, or retrofitting with these refrigerants. The Difference Between Refrigerants R134A and R410A Gas? I have a set of gauges and a evacuation pump that i use on my vehicles However the gauge set advertises that it is made for R134A, R407C and R404A. To be legal you must have valves at the end of your 12 hoses for the same reason. The concern is cross contamination within a car's A/C systems and recovery tanks. Which type of Quarter Panel repair do you need? R12 was used in most cars and trucks until 1995 when it was replaced with 134a. They have a barrier liner in the ID to prevent leakage. the heat pump is labeled with R410 A. Anyway on the low side R134a runs about 2 psi lower than R12 at equivalent temperatures. R12 and 134a are refrigerants used in car air conditioning systems. The difference between the gauge graduations has to do with the properties of the refrigerant, but they all read PSI/Vacuum. R12 contains CFCs like hairspray once did, that is potentially damaging to the ozone layer. Oil for R134a is not campatible with that of R-12/22. R134a has a smaller molecule than R12 so R134a will leak out sooner than R12. R134A or HFC-134A became the accepted standard, because it has no potential of ozone depletion and has similar (but not equal to) cooling abilities to the R-12 and R-22 refrigerants. Converting to 134a Depending upon the type of kit you purchase, you get all or most everything needed to convert to 134a except the refrigerant itself. The main difference between the two is that R12 is the amount of time they remain in earth's atmosphere, with the newer 134a significantly less than the old R12. the R12 stem looks like one you would find on one of your tires, the R134a stem is larger, and shaped differently. You will cross contaminate both system types, not a good thing. What’s your end goal and risk tolerance? Why was the manufacturing of R12 banned? (No Trucks) R134a, however, is not a direct replacement for R12 due to incompatibilities in the compressor oils used for each refrigerant. If you blow out your hoses you will be violating the law. 134 hoses have the adapters that seal the hoses to prevent leakage to the atmosphere. Increase Fuel Economy Less horsepower draw means better gas-mileage. you can tell the difference between the systems by looking at the valve stems used for putting in the refrigerant. window.addEvent('domready', function() { Could i use th … read more The main difference between the two is that R12 is the amount of time they remain in earth’s atmosphere, with the newer 134a significantly less than the old R12. - Passenger Cars, Mini Vans, SUV Service and Repairs. i think the amount that stays in the hose is a relatively small quantity to worry about for the FIY guy. R12 and 134a are refrigerants used in car air conditioning systems. The rubber used in AC systems with R12 is different then newer hose now used with 134. 10) Both refrigerants R450A and R513A are blends of R134a (HFC) and R1234yf/ze (HFO). You can use any gauges you like to check the pressure of the system, with slight risk of cross contamination. var myMenu = new MenuMatic(); But R22 is almost equally damaging. The refrigerant R134A is called tetrafluoroethane and is classified as one of the HFC gases from the other refrigerant variants. I own a Mastercool gauge set marketed for charging and testing R12 and R134a. Not only does it fit properly, but it looks good too. It is a VERY BAD idea to use the same gauges on both systems. We know that R12 and R134 refrigerant will not damage the manifold hoses or the gauge set. Available pure or as a blend, R134a also replaces R12 and R500 in chillers and both residential and commercial medium temperature refrigeration applications. The use of R134A prevented damage to the ozone layer. However, it was found to be a very bad gas for the environment. Going to a severe duty fan clutch can make all the difference in the world. R134 has NBP of about -19 C whereas R134a has a NBP of about -26C. R12 was once used in many air conditioning units as a refrigerant or cooling agent. R134 and R134a have same chemical formula and atomic weight but different chemical structures. I was wondering if one can tell the difference between R12 and R134A ports? R12 was used in most cars and trucks until 1995 when it was replaced with 134a. How to find a hidden gem of a Classic Car, What’s the difference between R12 and 134a Air Conditioning Systems. If the R12 system was retrofitted to R134A the Low (L) port would be different from the R134A? Better heat-exchange means colder a/c. The maximum difference registered between R152a and R134a was 4.49 K without IHX and 5.49 K working with IHX. Maybe it's illegal but so is going 5mph over the speed limit. That being said, the difference is not huge. Mercedes-Benz Tech Information and Support, http://www.mastercool.com/contact_us.html. Save Weight The compressor is less than half the weight of stock OE compressor. Flammability/Safety. The R12a cans use the same taps as the R134a cans and the supplied hose has R134a compatible fittings on both ends, so R12a can be used to recharge R134a systems too. 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. The guages do not care what you measure. R450A is a zeotropic blend and has a temperature glide of 0.8 K. R513A consists of 56% R1234yf and 44% R134a, it is an aceotropic blend with no temperature glide. }); R12 and 134a are refrigerants used in car air conditioning systems. Unlike R-134a, the new R-1234yf is extremely flammable with a flammability rating of F+. R-1234yf has been designated as MILDLY flammable. Why was the manufacturing of R12 banned? 99 When spilled, R-1234yf evaporates quickly which prevents product from entering drains, unlike R-134a. I am attaching what my L port system looks at present. The pressure/temperature curves for R-1234yf and R-134a are very similar. The "off" amount and percentage simply signifies the calculated difference between the seller-provided price for the item elsewhere and the seller's price on eBay. 3 Way AC Diagnostic Manifold Gauge Set for Freon Charging, Fits R134A R12 R22 and R502 Refrigerants, with 5FT Hose, ACME Tank Adapters, Adjustable Couplers and Can Tap 4.3 out of 5 stars 1,455 $34.99 $ 34 . 134 has a smaller molecular structure and leak slowly through old R12 hoses. Mastercool said that when R134a was being introduced as a replacement for R12 the rules established by SAE and several A/C groups was that any oil that remained in the manifold … Save Horsepower Rotary compressors draw significantly less horsepower of stock OE compressor; approximately 2-4 horsepower compared with 15-20 horsepower. Rules governing changing from the former to the latter differ between countries. Modern condenser Our highly efficient direct replacement parallel flow, piccolo-tube or serpentine condenser significantly improves system performance with better heat exchange. R134a is used in organic Rankine cycle for energy extraction from low temperature waste flue gas from different industries. The real problem is cross contamination of the oil used in the two systems. I understand there is concern about releasing tiny amounts of refrigerant into the atmosphere. So your r12 gauge set will work on r134a equipped vehicles. Why was the manufacturing of R12 banned? R-1234yf is fairly similar to R-134a with a few key differences. Thanks for the link to Mastercool's phone #'s. It makes no sense to me that they would market a set of gauges designed for R-12 and R134A, then include a caveat about avoiding use in systems containing mineral based oils. R-1234yf is fairly similar to R-134a with a few key differences. R-134A gauges usually come with QDs, but they are removable to access your standard refrigerant fittings. It was an attempt to stop people from using their R12 gauges and other stuff on R134a systems. Modernize the appearance of your engine compartment The smaller & cleaner look of the Sanden-style compressor combined with Original Air’s parallel flow condenser and pre-formed tubes are designed specifically to fit your stock application. This behaviour has been supported by other authors with very different values according the compressor used in their investigations: Ghodbane, 1999, Kim et al, 2008 and Bolaji et al. And don't forget the high side pressures vary with ambient temperature. Running engine at high RPM The compressor can handle 6,000 continuous RPM. R12 and R22 are both now banned by the EPA in the United States. It was banned because of this potential environmental risk and replaced by 134a because 134a, using synthetic oil over mineral oil, does not have as much of a negative environmental impact that R12 does. This will not be a problem with the Sanden-style rotary compressor. Richard B As i recall you are close to the time that ford was switching over from R12 to R134a. R134a is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC refrigerant.R134a..Here "a" is used to denote that it is an isomer. R134a compressors are built to run a higher head pressure (R134a has a higher working pressure than R12) and the lubricants are incompatible. As illustrated in the chart below, the curves below run together nearly throughout the curve, only slightly breaking paths at around 250 psig/150 degrees and above. R152A is slightly less dense than R134A, so it can theoretically contribute to better fuel economy as well. The blue cap was on the port and it is simply laying on top of the hose nearby. (The main difference between an R12 system and an R134a system is the condenser design) The old serpentine or tube and fin condensers don't have quite enough surface area to work well with R134a at low speeds and idle. NOTE: R134a can be charged in either the liquid or vapor state. Buy a new classic car body shell to restore. On the high side, R134a pressure runs about 10% higher pressure than R12 at equivalent temperatures. Unlike R12, R134A contains hydrogen and fluorine molecules, which is why it is also called HFC and not CFC. Difference between R134a and 134a? These guidelines are offered tohelp understand the differences. Operating Pressure/Temperature Differences. R12 systems can be converted to R134a but special modifications to the system are necessary. ... item 9 Refrigeration Air Conditioning A/C Diagnostic Manifold Gauge R134a R502a R22 R12 8 - Refrigeration Air Conditioning A/C Diagnostic Manifold Gauge R134a R502a R22 R12. R-134a => Popular and proven, but has Global Warming Potential implications R-600a (not 600A, there is a difference) => Isobutane. R-1234yf has a global warming potential (GWP) 300 times lower than R-134a. The original OE compressors have a strong tendency to leak at the shaft seal if the air-conditioning is not used on a regular basis sometimes in as little as two weeks of non-use. Up till now i've only used it on R134a systems. Well worth the money if your A/C system is still in good shape. All in all, I'm very happy with the results and see no reason why they won't last.