Two-Stage Screw Air Compressor

How to Differentiate Between Single-Stage, Two-Stage, and Multi-Stage Compressors

Distinguishing Between Single-Stage and 2 stage screw compressor  Based on Machine Structure.

A two stage screw compressor  consists of two pairs of rotors. After the gas undergoes the first stage of compression, it enters the second stage for further compression. The compression ratio is higher, and the power is reduced compared to a single-stage compressor.

By splitting the compression process into two stages and setting inter-stage pressure using equal pressure ratios, the compression ratio for each stage is significantly lower than that of a single-stage compressor. This results in a substantial reduction in rotor backflow leakage, leading to improved volumetric and adiabatic efficiencies, consequently increasing the final gas output.

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