Pumping apparatus

Details Pumping apparatus Pumping apparatus

1983-02-28

1985-01-15

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Control of working fluid and diverse apparatus part

415176, 415149R, 415 17, F04D 1502

Patent

active

044936095

ABSTRACT:
An apparatus for pumping a liquid stored under pressure without pressure-induced, liquid leakage during seal failure. The liquid or slurry being pumped is usually of a type that is difficult to handle, e.g., liquids which are volatile, poisonous, corrosive or a combination of these characteristics.
The apparatus comprises in combination a vessel capable of containing a liquid under pressure; a vertical pump with its inlet port in communication with the vessel; an equalizing line connecting the shaft housing of the pump with the vapor space of the vessel; and a shaft seal located within the pump above the equalizing line connection so that the vessel and the shaft housing can be pressure-equalized during seal failure.
The apparatus further provides pressure sensitive switching means so that the pump can be isolated upon occurrence of a specified pressure change within the vessel.

REFERENCES:
patent: 1891201 (1932-12-01), Hoff
patent: 2281682 (1942-05-01), England
patent: 2764943 (1956-10-01), Peters
patent: 2928249 (1960-03-01), Miles
patent: 3048118 (1962-08-01), Erd
patent: 3130878 (1964-04-01), Zimmermann
patent: 3333545 (1967-08-01), Covalt et al.
patent: 3339491 (1967-09-01), Malloch et al.
patent: 3481274 (1969-12-01), Napolitano

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