Pumps and Valves

G. Khiani, Fluor Canada Ltd., Calgary, Alberta, Canada  Pumps and valves for LNG service have many exclusive design characteristics and specifications that must be accounted for and followed during the development of an LNG terminal, storage tank or vessel (Fig. 1). Pumps are integrally mounted on the same shaft as the motor, which is submerged without coupling or mechanical seals in the LNG liquid. Fig. 1. Diagram of a vessel used in the transport of LNG. For retractable, in-tank applications, the pumps can be installed inside the LNG storage tanks in vertical pump columns, with foot valves located at the bottom. This setup removes the possibility of tank leakage du