Reconditioning of phosphate ester hydraulic control fluids

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

B - Operations, Transporting

01

D

182/1, 253/136

B01D 15/00 (2006.01) B01D 17/02 (2006.01) B01D 37/00 (2006.01)

Patent

CA 1155773

No. 54,516 ABSTRACT OF THE DISCLOSURE 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 hy- draulic fluid is continually circulated from a reservoir through the filters and returned to the reservoir.

369072

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