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R134a pressure chart

Ra Pressure Enthalpy Chart. Scroll down to find download buttons for pressure enthalpy charts in either Metric or Imperial Units. Downloads as a PDF. You can download that software free of charge also using this link. Save my name, email, and website in this browser for the next time I comment. Necessary cookies are absolutely essential for the website to function properly.

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R-134a System Pressure Chart

Log into your account. Password recovery. The Engineering Mindset. HVAC Pressure enthalpy chart. P-h Chart Download — Metric Units. P-h Chart Download — Imperial Units. R Pressure Enthalpy Chart. R32 Pressure Enthalpy Chart. RA Pressure Enthalpy Chart. Please enter your comment! Please enter your name here. You have entered an incorrect email address!

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r134a pressure chart

Paul Evans - Feb 14, 0. Paul Evans - Apr 7, 1. Paul Evans - Jul 24, 3.I have enjoyed your youtube channel very much, thanks. I wander if you had any plans to publish the RA thermodynamic property tables?

I was looking to run through the same calculations and compare the theoretical COP and cooling loads etc with the real experimental data. Thank you because of your complete description For full description I have a qaustion ,why do you start with kpa Pressure in step one of ra refrigeration? Save my name, email, and website in this browser for the next time I comment. Necessary cookies are absolutely essential for the website to function properly.

This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies.

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Password recovery. The Engineering Mindset. Refrigerant Ra Properties. K Sat. Specific heat capacity of materials. Density of Gases. Density explained! Hello Paul I have enjoyed your youtube channel very much, thanks. Thanks Will. Thank you so much and I have one doubt that what is enthalphy where it was used.Ra is the most common refrigerant found in automobiles today. That being said, there are still millions of cars on the road that use Ra and there will be continue to be for at least another decade or more.

One of the very first steps is to check the pressure of your system. Understanding the pressure that your system is at as well as knowing what the saturation point is of Ra will allow you to properly diagnose what is wrong with your system. Remember, that air conditioning is basically changing the pressure on the refrigerant until a state change is reached. If your pressure is off then that could point you in the right direction.

With the facts behind you can then begin to determine if your compressor is at fault, perhaps your condenser, or it could be something as simple as your blower motor needing replaced. Without knowing the pressure in your system and the corresponding saturation point then you are in essence going in blind when you attempt to troubleshoot your air conditioning system.

I can assure you that when you take your vehicle into a dealership that the pressure and temperature are one of the first things they check when troubleshooting. There you have it folks.

I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data. The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. RefrigerantHQ's Pressure Charts. You may also like.

We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. This content is provided 'As is' and is subject to change or removal at any time. Privacy Privacy Policy Disclaimer Advertising.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. I just did my first automotive AC repair, after the compressor in my Lancer 2.

Before recharging, I googled 'ra pressure chart', and found the following:. At the time, it was 82F in my garage, so I was expecting to end up in the middle of the range both low- and high-pressure for the 80F row When referring to this chart, I assumed that the target low readings were for when the clutch was disengaged, and the target high readings were for when the clutch was active.

However, after my recharge the highest low reading I see right before clutch engages is 40psi, and the highest reading I ever see for the high side is right before the clutch disengages. Should I be concerned about these low operating pressures, given my starting ambient temperature?

As I said, AC appears to be working very well. The compressor clutch cycles about 12 seconds on, and 12 seconds off. I'm not sure what's an exceptable duty cycle there. Also I was parked in a garage, not running down the road, air flow through the condenser wasn't exactly real-world. Of course the fans kicked on whenever the clutch engaged. This is why some manufacturers recommend charging refrigerant by mass rather than by high-side, low-side and ambient temperature values.

As long as you have charged the system with the correct amount of refrigerant which you have according to the tolerance defined in your manualyou should be fine. Another sanity check is that the low-pressure switch activates at 32 psi, which is lower than the 40 psi you are seeing on the low-side.

I'm not sure if your Lancer is equipped with a high-side pressure switch but the same principle applies.

R134A AC System Pressure - How to Spot the Issues!

The UV dye is added if you want to detect leaks with UV light. Else it shouldn't be necessary. PAG is the right oil for your car and is absolutely necessary to since it lubricates the internals of the compressor. Not sure about the Lancer, but on some vehicles the pressure switch is a capacitor where the refrigerant pressure controls the distance between the two plates, thereby altering capacitance and voltage.

Once again, the level of detail provided in this question is stellar. I'd consider this to be the golden standard for all AC-related questions. Bissell I am impressed with how much attention you gave to this task. Last year, I took my VW to authorized dealer to replace the compressor and they overfilled it. But meanwhile I have researched how to diagnose AC problems.

Unfortunately, they used some robinair machine and it showed the correct amount put into the system but it was still wrong You should be able to check the correct operation even though you do not have the vehicle specific values.

This can be accomplished by checking super-heat and sub-cooling. While the chart you have put is not universal, the temperatures that the refrigerant turns into liquid and vaporize only depend on the pressure and it has a chart also. Same as water boiling at sea level at C F but at lower temp at high altitudes because pressure is less, same rule applies to refrigerant. So, using laws of physics you can tell a lot about the operation of the system.The HFO Ryf is the refrigerant of the future.

Or, at least, that is how it has been marketed. Yf was the first HFO refrigerant to see mainstream attention. A few years back there was immense pressure in the European Union to stop using the HFC Ra for automotive air conditioning. Ra has a GWP of one-thousand four-hundred and thirty. It is classified as a super pollutant.

Yf refrigerant has a Global Warming Potential of only four.

r134a pressure chart

That is a huge difference when comparing it to other refrigerants on the market today. The European Union quickly phased down and out Ra and had their new vehicles start taking Ryf. While the acceptance of yf is much slower here in the United States there are numerous vehicle manufacturers who have begun using this refrigerant in their newer model vehicles. With each year that passes more and more vehicles begin taking yf. To read more about yf please click here to be taken to our official refrigerant fact sheet on yf.

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data. The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. RefrigerantHQ's Pressure Charts. You may also like. We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer.

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r134a pressure chart

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What's a good Ra pressure at rest? Thread starter jjdrewski Start date Jun 25, Joined Jan 3, Messages Points 0. Suction pressure was 50 plus psi running. It even cycled the compressor and high speed fan by means of the high pressure safety switch new, also hoses, dryer, reduction valve new After the hot spell passed, I got 83 psi at 73 degrees f ambient. Does it seem to y'all that there is too much Ra in the system? Book calls for 26 oz. After running the system on the road.

Do I need bnother trip to the shop, or is this OK? NickD wrench. Joined Aug 28, Messages 4, Points Correct low side pressures are measured at 1, engine rpm, AC on, doors open, blower at maximum speed. If you had an old POA system, would see a low side of 28 psi for some really great cooling, but they started making AC systems cheaper than better. Low side pressures would even be greater at hot ambients in high humidity conditions.As an air-conditioning refrigerant in newer automobiles, the optimal running pressure for RA is between 22 and 57 pounds per square inch.

Ass a refrigerant, a liquid capable of vaporizing at low temperature, used in automotive air conditioning, the U. Environmental Protection Agency, states that RA is not flammable at ambient temperatures and not corrosive to metals such as aluminum, copper and stainless steel. Like other refrigerants, the pressure of RA corresponds to its temperature. In a high-temperature refrigeration box, where temperatures typically range from 45 to 60 degrees Fahrenheit, the coil temperature is, typically, between 10 and 20 degrees Fahrenheit colder than the box itself.

This difference is simply known as the temperature difference.

R-134a Refrigerant Pressure Temperature Chart

In other words, the normal running pressure of RA is between 22 and 57 psi in such a system. A full-time writer sinceDavid Dunning is a professional freelancer specializing in creative non-fiction. About the Author. Copyright Leaf Group Ltd.


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