A rotary-screw compressor is a type of gas compressor, such as an air compressor, that uses a rotary-type positive-displacement mechanism. These compressors are common in industrial applications and replace more traditional piston compressors where larger volumes of compressed gas are needed, e.g. for large refrigeration cycles such as chillers, or for compressed air systems to. WorkingRotary-screw compressors use two very closely meshing spiral rotors to compress the gas. In a dry-running. .
The capacities of rotary-screw compressors are typically rated in (HP), ()* and (PSIG.) For units in the 5 through 30 HP range the physical siz. .
The screw compressor was first in 1878 by Heinrich Krigar in , however the patent expired without a working machine being built. The modern helical lobe screw compressor was develo.
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