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Tuesday, March 10, 2009

Centrifugal pumps for chemical applications

Horizontal single-stage end-suction overhung impeller centrifugal pumps (for chemical applications includes ISO 2858, ISO 3069, ISO 3661, ASMEIANSI B73.1 designs)

ANSI, the American National Standards Institute, has a philosophy more similar to DIN than ISO in that it specifies materials and mechanical seal options. B73.1 is a standard for single stage centrifugal pumps, with back pull-out, intended for chemical and corrosive duties.  The Standard specifies bareshaft pump dimensions, also installation dimensions for complete packages with motor and baseplate. The Standard does not specify hydraulic duties. Mechanical seal arrangements, with various piping plans, are detailed to cover most applications. Depending upon materials and cooling arrangements pumpsmust be suitable for at least 260 deg. C.

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