Apparatus for oil filtration and recirculation

Details Apparatus for oil filtration and recirculation Apparatus for oil filtration and recirculation

1989-02-27

1991-10-15

Hart, Charles

Liquid purification or separation

Structural installation

Closed circulating system

2101951, 2104165, B01D 3518

Patent

active

050576585

ABSTRACT:
An apparatus for filtering and recirculating oil used in a vacuum pump is disclosed. The filtration device comprises first and second valves permitting, respectively, addition and deletion of oil from the system. A plurality of filter elements are provided to remove particulate contamination from the oil. In a preferred embodiment, the vacuum pump is situated in an enclosure which retains therein the latent heat produced by the vacuum pump. Alternatively, an oil heater may be provided. The oil is preferably maintained at a temperature of greater than about 40.degree. C., so that the particulates entrained therein remain in a sludge.

REFERENCES:
patent: 4015369 (1977-04-01), Dietrick
patent: 4622135 (1986-11-01), Williams
patent: 4664798 (1987-05-01), Bergh
patent: 4772402 (1988-09-01), Love
patent: 4803745 (1989-05-01), van der Meulen
patent: 4861352 (1989-08-01), Cheng
patent: 4865749 (1989-09-01), Yoshida

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