Method for stabilizing the relationship between the filtering un

Details Method for stabilizing the relationship between the filtering un Method for stabilizing the relationship between the filtering un

1985-01-08

1986-10-21

Wyse, Thomas

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210791, 210110, 210111, 210137, 210340, 2104165, B01D 3704

Patent

active

046184317

ABSTRACT:
A method of reducing the effects of fluctuating fluid pressure differential between the inlet and the outlet of a filtering unit operating in a system for filtering metal contaminants from a lubricating coolant and for recycling a constant volume flow of filtered lubricating coolant to a workpiece to be subsequently machined by pumping metal-contaminated lubricating coolant from a holding vessel to a filtering unit-modulator valve combination, monitoring the pressure or flow rate of filtered lubricating coolant downstream of the filtering unit-modulator valve combination, and operating the modulator valve in response to any changes in the downstream monitored flow parameter so as to maintain a predetermined constant fluid pressure differential across the filtering unit-modulator valve combination, thus compensating for fluctuations across the filtering unit during filtering operation, resulting in the maintenance of constant head pressure at the outlet of the pump, as well as for maintenance of a constant volume of flow of filtered lubricating coolant at a constant pressure to the workpiece to be machined.

REFERENCES:
patent: 3656620 (1972-04-01), Larson et al.
patent: 3957637 (1976-05-01), Morey
patent: 4151080 (1979-04-01), Zuckerman et al.
patent: 4427551 (1984-01-01), Dureau
patent: 4469595 (1984-09-01), Napadow
patent: 4487689 (1984-12-01), Galaj

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