May 2006

Special Report: Maintenance/Reliability

Labyrinth compressors improve reliability in low-temperature service

Operating experience has been good in several installations

Ernst, P., Burckhardt Compression AG

For LNG ship transportation, a cryogenic receiving terminal is required at the port of destination. Impressive installations are required for safely and economically storing and handling the LNG and associated boil-off gases created during unloading and storage. Obviously, safe and environment-conscious handling of the cargo – preventing leaks, exposure of materials to cryogenic temperatures and bone-dry gas, as well as rapid temperature changes – are of high concern to the designers. Among the rotating machinery used in this field are reciprocating compressors. This article presents the design features of labyrinth-piston compressors specially designed for recovering LNG boil-of

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