Reconditioning of phosphate ester hydraulic control fluids

Details Reconditioning of phosphate ester hydraulic control fluids Reconditioning of phosphate ester hydraulic control fluids

1980-02-13

1981-11-24

Cintins, Ivars C.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210669, 210689, 210806, 210167, 210266, B01D 1500

Patent

active

043023355

ABSTRACT:
A method and apparatus for recovering or maintaining phosphate ester type hydraulic fluids in serviceable condition which comprises sequentially filtering the fluid through at least a coalescer type filter and a mole-sieve type filter, preferably in conjunction with an activated charcoal powder filter and a small pore particle filter. In maintaining a hydraulic system in service, a small quantity of the hydraulic fluid is continually circulated from a reservoir through the filters and returned to the reservoir.

REFERENCES:
patent: 2373807 (1945-04-01), Beeg et al.
patent: 3224845 (1965-12-01), Thomas
patent: 3312351 (1967-04-01), Kasten
patent: 3394812 (1968-07-01), Cohen et al.
patent: 3649721 (1972-03-01), Burrous et al.

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