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 OS85 onward, high-quality, approved and reliable shaft seal reliable continuous operation through patented lubrication system and generously dimensioned bearings, suitable for all conventional refrigerants: chlorine-free HFC and R22, ammonia OS.A version standard motors can be flanged directly to the optional coupling housing without costly alignment work (clutches are also available as accessories).