R438A (FREON™ MO99)

R438A is an easy to use, non-ozone depleting HFC refrigerant blend.  It is ideally suited as an R22 replacement for all air conditioning and chiller applications with performance, capacity, mass flow and pressure characteristics a close match for R22.  It has advantages over R422D where the expansion valve has a fixed orifice or is closely sized to the capacity of the system, whilst it has better capacity compared to R417A.

This product is compatible with traditional and new lubricants, providing a quick, easy and cost effective retrofit, and can be topped up during service without removing the entire refrigerant charge.  As R438A is a blend, it should always be removed from the cylinder as a liquid when charging the system.