Designed for Low-Temp applications, replaces R-22, R-502 and R-404A.
Air conditioning Split Systems
Heat Pumps
Geothermal Heat Pumps
Cold Stores
Supermarket Pak Systems
Dairy Chillers
Reach-In Storage
Bakery Applications
Refrigerated Transport
Display Cabinets
Walk-In Coolers
The closest Pressure-Tempature match to R-404a
No Unit Modification
Does not contain Hydrocarbons
Temp (F) |
Liquid Phase Pressure (psig) | Vapor Phase Pressure (psig) |
|---|
| -50 | 0.0 | -2.1 |
| -45 | 2.1 | -0.2 |
| -40 | 4.4 | 1.9 |
| -35 | 7.0 | 4.2 |
| -30 | 9.8 | 6.8 |
| -25 | 12.9 | 9.6 |
| -20 | 16.2 | 12.7 |
| -15 | 19.9 | 16.1 |
| -10 | 23.9 | 19.9 |
| -5 | 28.3 | 24.0 |
| 0 | 33.0 | 28.4 |
| 5 | 38.1 | 33.2 |
| 10 | 43.6 | 38.5 |
| 15 | 49.5 | 44.1 |
| 20 | 55.9 | 50.2 |
| 25 | 62.7 | 56.8 |
| 30 | 70.1 | 63.8 |
| 35 | 77.9 | 71.4 |
| 40 | 86.3 | 79.4 |
| 45 | 95.2 | 88.1 |
| 50 | 104.7 | 97.3 |
| 55 | 114.8 | 107.1 |
| 60 | 125.5 | 117.6 |
| 65 | 136.9 | 128.7 |
| 70 | 148.9 | 140.5 |
| 75 | 161.7 | 153.0 |
| 80 | 175.2 | 166.3 |
| 85 | 189.4 | 180.3 |
| 90 | 204.4 | 195.2 |
| 95 | 220.2 | 210.8 |
| 100 | 236.8 | 227.3 |
| 105 | 254.4 | 244.8 |
| 110 | 272.8 | 263.1 |
| 115 | 292.1 | 282.5 |
| 120 | 312.5 | 302.8 |
| 125 | 333.8 | 324.2 |
| 130 | 356.2 | 346.8 |
| 135 | 379.7 | 370.5 |
| 140 | 404.4 | 395.5 |
| 145 | 430.2 | 421.9 |
| 150 | 457.4 | 449.7 |
Available in 24lb cylinders, Choice R-421B is designed to run in commercial refrigeration, and low-temp applications.
Designed to Perform
We designed R-421B to have a nearly identical pressure-temperature (PT) relationship as R-404A. This is a key factor in retrofitting without significant deviations in general operation and metering. With R-421B, there is no unit modification needed -saving you time and money.
Consistent Temperatures
Many Low Temp R-22, R-502 alternatives on the market have 3, 4 and even 5 separate refrigerant components that comprise the blend. Each of these components have a unique PT curves that can vary from one another widely. This is known as temperature glide, and glide is a big problem. Glide causes inconsistent evaporator temperatures, resulting in performance degradation .
This is why we designed R-421B to have only 2 refrigerant components and the lowest temperature glide of leading Low Temp R-22, R-502 alternatives.
Compressor Friendly
We’ve packaged R-421B with a proprietary lubricant, designed to facilitate oil return to the compressor.
R-421B is covered under U.S. Patent US 7,320,763
