Pump delivery flow rate control apparatus

Details Pump delivery flow rate control apparatus Pump delivery flow rate control apparatus

1991-04-11

1993-05-25

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 7, 417 32, F04B 4906

Patent

active

052134776

ABSTRACT:
A control apparatus for controlling a delivery flow rate of a pump pressure-feeding process liquid within a process pipe system is described. The control apparatus has detecting means for detecting available N.P.S.H. of a pump on the basis of a pressure and a temperature of the process liquid within the suction portion of the pump, and calculating means for calculating an allowable maximum flow rate of the pump so as to hold the relationship: available N.P.S.H. required N.P.S.H. The control apparatus also has outputting means for outputting a control signal to control the delivery flow rate of the pump on the basis of the smaller value, the allowable maximum flow rate or a required flow rate of the pump.

REFERENCES:
patent: 2870716 (1959-01-01), Meneley
patent: 4576197 (1986-03-01), Kempers
patent: 4678405 (1987-07-01), Allen

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