Integrally Geared SPI 617 Process Gas Compressors.
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Integrally geared (IG) centrifugal compressors, originally developed for plant and instrument air service, continue to gain acceptance in process gas applications as an alternative to other types of centrifugals, and in many instances, reciprocating compressors. Manufacturers have developed a class of integrally geared compressors that have demonstrated high levels of safety, reliability, and robustness; these machines are routinely specified for process has services. The API Standard 617 (Draft) has recently been revised (Seventh Edition) and now addresses IG centrifugal compressors for process gas service. This tutorial describes important technical features of IG compressors, and compares them with traditional API 617 beam-type compressors.
Beaty, Peter J.; Eisele, Klaus; Maceyka, Thomas D.; Schwarz, Carl L. (2000). Integrally Geared SPI 617 Process Gas Compressors.. Texas A&M University. Turbomachinery Laboratories. Available electronically from