BITZER's screw compressors offer decisive advantages: high cooling capacity and COP with or without economiser operation, integrated, efficient capacity control for 100-75-50%; stepped or infinite slider control from HS85 onward, reliable continuous operation through patented lubrication system and generously dimensioned bearings, suitable for all conventional refrigerants: chlorine-free HFC and R22, parallel operation with up to 6 compressors (2460 m3/h displacement or 840 kW rated motor power).