Method and apparatus for flow diversion in a high pressure fluid

Details Method and apparatus for flow diversion in a high pressure fluid Method and apparatus for flow diversion in a high pressure fluid

1978-05-02

1980-01-08

Nilson, Robert G.

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137117, 239126, 417299, 417300, F16K 31363

Patent

active

041823540

ABSTRACT:
A method and apparatus for the diversion of fluid flow at reduced pressure out of a high pressure fluid delivery system when the discharge of the system is closed. A bypass valve having a movable piston oriented transverse to the flow direction and a slidable seal oriented parallel to the flow direction is located between the system pump and discharge. The movable piston has two working surfaces of different areas which define planes parallel to the flow direction so that the working surfaces and therewith the piston are generally responsive only to static fluid pressure. The slidable seal is responsive to dynamic fluid pressure so that when the discharge is closed and the dynamic fluid pressure thereby reduced, the seal moves to interrupt fluid communication between the two working surfaces of the piston. Interruption of fluid communication between the two working surfaces allows for a static fluid pressure differential on the two working surfaces which moves the piston and opens the bypass valve so that the flow of fluid is diverted out of the system at a substantially reduced pressure.

REFERENCES:
patent: 1280477 (1918-10-01), Hopkins
patent: 2609829 (1952-09-01), Davies
patent: 3786828 (1974-01-01), Krechel
patent: 3827827 (1974-08-01), Hill

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