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.
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.
We’ve packaged R-421B with a proprietary lubricant, designed to facilitate oil return to the compressor.