HSK = Application for air-conditioning and medium temperature cooling

HSN = Application for low temperature cooling

BITZER’s semi-hermetic HS screw compressors feature a built-in suction gas-cooled motor integrated into the refrigerant circuit. For many years, they’ve proven to be a robust and efficient market solution – on their own and in parallel operation with several compressors and a shared oil separator. Because they’re compatible with a variety of refrigerants and boast a wide range of capacities and applications, these compressors are the first choice for large-scale commercial and industrial applications. They’re used when larger refrigerating capacities are required, for instance in blast freezers for the food industry as well as in refrigerator and freezer distribution warehouses. HS compressors are also suitable for many other refrigeration and heat pump applications.

Technical Features

Optimised for parallel operation

High system output
Optimal capacity adjustment and minimal energy requirements under full- and part-load
Combination of various compressor sizes

Robust design

Large bearings
Large built-in motor

HS53 .. 74

High efficiency profile
High efficiency motor
Efficient capacity control
Economiser mode

HS85

Combination of proven HS technology with the innovative features of the CSH series

Slide control for seamless or stepped capacity control

Economiser with sliding suction position
Effective even under part-load

Built-in oil management system
Automatic oil stop valve
Oil filter
Oil monitor