Combined boiler feed and condensate pump

Details Combined boiler feed and condensate pump Combined boiler feed and condensate pump

1991-12-26

1993-06-01

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

4174237, 41742314, F04B 1700, F04B 3504

Patent

active

052154483

ABSTRACT:
A boiler feed pump including an elongate casing adapted to be interconnected in a pipeline and a variable speed electrical motor driving an axially extending shaft, which drives a condensate inducer pump and a multiple stage centrifugal pump, all of which are housed within the casing. The inducer pump comprises a series of axially spaced rotating annular disks which the condensate flows between. The centrifugal pump receives the condensate from the inducer pump and pumps it to a higher pressure suitable for feeding a boiler. The motor can operate at a variable speed to handle various flow demands. The motor also serves as a thrust balancing device for the multiple stage centrifugal pump.

REFERENCES:
patent: 3226012 (1965-12-01), Trask
patent: 3975117 (1976-08-01), Carter
patent: 4523896 (1985-06-01), Lhenry et al.
patent: 4932848 (1990-06-01), Christensen
patent: 4981420 (1991-01-01), Jensen et al.
patent: 5028218 (1991-07-01), Jensen et al.

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