Compressor specialist BITZER has optimised its two-stage reciprocating compressors. All models can now be run with R448A and R449A refrigerants and thermostatic expansion valves.
With low global warming potential (GWP) values of 1 386 and 1 397, both refrigerants are eco-friendly alternatives to R404A, whose GWP value is 3 922. The EU F-gas Regulation prohibits the use of R404A beyond the year 2020 in stationary areas.
Tests have shown that the technically improved compressors can be run perfectly with the two refrigerants – both with and without a liquid subcooler.
For more information contact 0027 (0)11 493 6622



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  1. Established back in 1973, Cooper Freer have been supplying customers with air compressor units for more than 43 years in Leicester, Peterborough, Corby, Northampton. Our deep knowledge about the products help you find the right systems for your applications.


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