S4T-5.2Y-40P 400V with subcooler mounted

2-step semi-hermetic reciprocating piston compressor 4 to 44 kW 2nd generation

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With its 2nd generation 2-step compressors, BITZER is setting new standards in technology and performance for enhanced low temperature applications.

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This series is the result of intensive research based upon many years of experience in the construction of exceptionally economical and solid reciprocating piston compressors.

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With regard to the changing requirements for using alternative refrigerants, many aspects of these compressors have been further developed and specially optimised for operation with HFCs R404A and R507A.

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The experience gained from parts that have been tried and tested of many years was drawn upon in order to offer an exceptionally robust design for a wide range of applications.

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The gas flow and service valves have been specially tuned for low temperature operation. In combination with a 2nd generation driving mechanism and motor designed to be as effective as possible, an even better cost effectiveness compared to conventional low temperature systems has been achieved.

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Just one model series for chlorine-free HFC refrigerants and CFCs.

Changing over to HFC refrigerants:

• Use a polyolester oil approved by BITZER

• “Y” suffix in the type designation

• Adjust expansion value for intermediate cooling to the HFC refrigerant