March 2021

Valves, Pumps and Turbomachinery

Double-suction centrifugal compressor in ethylene plant inlet piping design

Centrifugal compressors are designed with different suction nozzle orientations and impeller layouts in casing.

Zardynezhad, S., TurboTech Consulting Corp.

Centrifugal compressors are designed with different suction nozzle orientations and impeller layouts in casing. Centrifugal compression trains may be supplied in series and parallel arrangements to achieve the total flow and head requirements of a specific application. The impeller configuration and arrangement in centrifugal compressors can be straight-through, compound, back-to-back, double-suction, and side-loaded, among others. Centrifugal compressors are used in ethylene plants for cracked-gas compression and refrigeration services. The large gas volume requirement in ethylene plants, and the need to reduce the head per stage due to fouling, make a double-flow configuration suitable f

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