Hello readers welcome to the new post. Here we will learn the R-449A Pressure Temperature Chart. R449a is a mixture of hydrofluorocarbons (HFC) and hydrofluoro-olefin molecule R1234yf (HFO), that composition of R125 (25%), R32 (24%), R134a (26%), and R1234yf (25%) gases. Refrigerant R449a has non-toxic features with non-flammability and is given the A1 safety features for EN 378 and ASHRAE 34 standards. Chlorine does not exist in R449a and it has 0 ozone depletion potential value. Its global warming potential is 64 percent less than R404a. It is best for new installation and also for retrofitting existing circuits, providing good energy efficiency and environmental features. Let’s get started with R-449A Pressure Temperature Chart.
R-449A Pressure Temperature Chart
| R449A PT Chart | ||
| Temperature (°C) |
Pressure Liquid (psig) |
Pressure (psig) Vapour |
| -70 | -11.18 | -12.34 |
| -68 | -10.71 | -12.00 |
| -66 | -10.19 | -11.62 |
| -64 | -9.62 | -11.19 |
| -62 | -8.99 | -10.73 |
| -60 | -8.30 | -10.21 |
| -58 | -7.54 | -9.63 |
| -56 | -6.71 | -9.00 |
| -54 | -5.80 | -8.31 |
| -52 | -4.81 | -7.55 |
| -50 | -3.74 | -6.72 |
| -48 | -2.58 | -5.81 |
| -46 | -1.32 | -4.82 |
| -44 | 0.04 | -3.75 |
| -42 | 1.50 | -2.58 |
| -40 | 3.08 | -1.32 |
| -38 | 4.78 | 0.04 |
| -36 | 6.60 | 1.52 |
| -34 | 8.56 | 3.10 |
| -32 | 10.65 | 4.81 |
| -30 | 12.88 | 6.64 |
| -28 | 15.27 | 8.61 |
| -26 | 17.81 | 10.71 |
| -24 | 20.51 | 12.96 |
| -22 | 23.39 | 15.37 |
| -20 | 26.44 | 17.93 |
| -18 | 29.68 | 20.66 |
| -16 | 33.10 | 23.56 |
| -14 | 36.73 | 26.65 |
| -12 | 40.56 | 29.92 |
| -10 | 44.61 | 33.39 |
| -8 | 48.88 | 37.06 |
| -6 | 53.37 | 40.95 |
| -4 | 58.10 | 45.05 |
| -2 | 63.08 | 49.38 |
| 0 | 68.31 | 53.95 |
| 2 | 73.79 | 58.77 |
| 4 | 79.55 | 63.83 |
| 6 | 85.58 | 69.16 |
| 8 | 91.90 | 74.76 |
| 10 | 98.51 | 80.65 |
| 12 | 105.42 | 86.82 |
| 14 | 112.64 | 93.29 |
| 16 | 120.17 | 100.07 |
| 18 | 128.04 | 107.17 |
| 20 | 136.24 | 114.59 |
| 22 | 144.78 | 122.36 |
| 24 | 153.67 | 130.47 |
| 26 | 162.92 | 138.95 |
| 28 | 172.55 | 147.80 |
| 30 | 182.56 | 157.02 |
| 32 | 192.95 | 166.65 |
| 34 | 203.75 | 176.67 |
| 36 | 214.95 | 187.12 |
| 38 | 226.56 | 198.00 |
| 40 | 238.61 | 209.31 |
| 42 | 251.08 | 221.10 |
| 44 | 264.02 | 233.33 |
| 46 | 277.39 | 246.07 |
| 48 | 291.23 | 259.30 |
| 50 | 305.56 | 273.05 |
| 52 | 320.36 | 287.33 |
| 54 | 335.68 | 302.17 |
| 56 | 351.48 | 317.58 |
| 58 | 367.81 | 333.57 |
| 60 | 384.67 | 350.19 |
| 62 | 402.07 | 367.43 |
| 64 | 420.02 | 385.34 |
| 66 | 438.52 | 403.96 |
| 68 | 457.61 | 423.28 |
| 70 | 477.27 | 443.40 |
Is R449A a replacement for r22?
(R-449A) is a low global warming potential hydrofluoric-olefin (HFO)-based refrigerant made as a direct replacement of HCFC-22 (R-22) and R-404A/R-507 in positive displacement, low and medium temperature commercial and industrial uses.
Can I replace R404A with R449A?
It is explained that with slight expansion device configuration and four percent increases of refrigerant charge, R449a is used in refrigeration systems made for R404A since it has good thermodynamic featues and acceptable maximum discharge temperature.
Can I replace R-22 with R32?
There are 2 replacement refrigerants used for R22, R29 and R32. The R290 is used in working fluid A/C systems of Europe countries, and in Japan and South East countries, R32 is used as a substitute refrigerant for R22 and R410A.
What is the best alternative to R-22?
Freo M099 or R438A is the preferred alternative for retrofitting. Freon MO99 is standard for the R22 alternative and is used by scientists who engineered Freon R-22.
Is R449A flammable?
R449A is not flammable in air for ambient conditions or temperature and pressure. Some mixtures of R449A and air in pressure are flammable.
What is the difference between R404A and R449A?
The mass flow rate of R49A is about 13 less than R404a. Compressor energy use and cooling capacity of R449A is two percent and 7 percent higher thatn R404a. The cooling effect of R449a is about 23 percent larger than that of R404A. R449a comes with an average of five percent higher COP than R404A.
What pressure should R449A run at?
Recovery of R449A needed recovery cylinder having service pressure of 300 psig minimum.
Who makes R449A?
R449A – National Refrigerants Ltd.
Is R449A ozone depleting?
(R-449A) is non-ozon depleting low global warming potential hydro fluoro-olefin (HFO)- based refrigerant with the optimal balance of featues to replace R-404A/R-507, R-22, or R-407 series refrigerants as positive displacement direct expansion.
R449A an F gas?
R49a is hydrofluorocarbon/hydroolefin blend (HFC + HFO) that comes with R134a + R1234yf + R125 + R32, which can used as a replacement for R04A and R507 in a wide range of commercial and industires refrigeration uses. R449a is a nonflammable refrigerant (Safety Class A1
Can you mix 449A and 404a?
R-404A systems can retrofitted with R449a without fuss, needing just TXV or powerhead changout, if the powerhead is variable. oils are the same for both refrigerants, as both are HFC blends, the system has POE oil.
R449A PROPERTIES
| ASHRAE NUMBER | R449a |
| COMPOSITION |
R32/R125/R1234yf/R134a
|
| BOILING POINT @ 1ATM [°C] | -$46 |
| GWP AR5 | 1397 |
| ASHRAE SAFETY CLASS | A1 |
| TEMPERATURE GLIDE [K] | 0 |
| MOLECULAR WEIGHT [G/MOL] | 87.2 |
| LIQUID DENSITY @ 21.1°C [KG/M³] | 1113.3 |
| CRITICAL TEMPERATURE [°C] | 81.5 |
| OZONE DEPLETION POTENTIAL | 0 |
APPLICATIONS:
- It is used in low and medium temperatue commercial and industries DF refrigeration.
- it is condensing units and cold stores.
- it used for cold stores
- it used in new instruments and retrofit of existing system
Features & Benefits:
- It used as a replacement for R404A and R507
- It is a zeotropic refrigerant blend that comes with R32, R125, R1234yf, and R134a
- Refrigerant must charged from the liquid phase to make sure of the composition.
- The refrigerant cylinder comes with dual port valves making liquid offtake easily.
- It is reno flammable and comes with a safety classification of A1
- Its storage must be kept away from fire, and heat and avoid direct sunlight. it is normally up in a cool, dry, and ventilated place. The cylinder, valve, and other devices can be damaged, so they need careful handling.
- It has a low GDP with high-quality air700 and accepts SGS and third-party inspection.
- R49a is an HFO blend used for R404A and R507 for low and medium-temperature refrigeration GWP of 1397 provides good energy efficiency and environmental properties.
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