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Screw-type compressors operate on the positive displacement principle. Two parallel rotary pistons with different profiles are driven in opposite directions inside a housing. About half of all compressors produced today are screw-type compressors.
Screw-type compressors are mainly used in factories where large amounts of air are needed. Two types are available: oil-injected and oil-free screw-type compressors.
Requirements on the bearings