Control for liquid ring vacuum pumps

Details Control for liquid ring vacuum pumps Control for liquid ring vacuum pumps

1985-05-30

1987-04-07

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 45, 417 68, 417 5, F04B 4900, F04C 1900

Patent

active

046556885

ABSTRACT:
A closed loop control is provided to control pressure and/or temperature in a system where one or more liquid ring vacuum pumps evacuate a recipient. The suction ability of the liquid ring vacuum pumps is controlled either by speed control, operating water temperature, switching-on and -off of pumps or bypass-air. Simultaneous control of all operating characteristics is achieved with a programmable electronic controller.

REFERENCES:
patent: 1681574 (1928-08-01), Farmer
patent: 1867813 (1932-07-01), Easton
patent: 2230405 (1941-02-01), Jennings
patent: 2971691 (1961-02-01), Lorenz
patent: 3981618 (1976-09-01), Nelson, Jr.
patent: 4087208 (1978-05-01), Uda et al.
patent: 4151725 (1979-05-01), Kountz et al.
patent: 4225288 (1980-09-01), Mugele et al.
patent: 4336001 (1982-06-01), Andrew et al.
Siemens Zeitschrift, vol. 44, Jun. 1970, pp. 387-392.

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