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Choice 421B

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

Features

 
The closest Pressure-Tempature match to R-404a

The closest Pressure-Tempature match to R-404a

No Unit Modification

No Unit Modification

Does not contain Hydrocarbons

Does not contain Hydrocarbons

SIMPLE. RELIABLE. SAFE.

R-421B PT Chart

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

 

421b cylinder v3.png
 
R421B Cylinder
260.00
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Product Details

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.

Additional Information

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