Shaft seal coolant flow control

Details Shaft seal coolant flow control Shaft seal coolant flow control

1994-07-21

1995-10-10

Fox, John C.

Fluid handling

Systems

Plural noncommunicating flow paths

251121, 251205, F16K 1100

Patent

active

054562864

ABSTRACT:
For a shaft seal for a pump, a barrier fluid flow and pressure control method, system, and apparatus providing a manifold having oppositely axially arranged flow and pressure control valves, the control valves having open-ended valve cylinders reciprocally adjustable within flow channels of the manifold, the valve cylinders having elongate flow orifices selectively positionable within the flow channel with said orifice in selective registry with a respective outlet. The extent of registry of the elongate orifice with the respective outlet controls the rate of flow through the valve. The pressure control valve sets the barrier fluid pressure while the flow control valve sets a minimum flow required for the barrier fluid operation.

REFERENCES:
patent: 1777261 (1930-09-01), Grainger et al.
patent: 4624444 (1986-11-01), Johnson
patent: 4795131 (1989-01-01), Scarano et al.
patent: 4971099 (1990-11-01), Cyvas

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