Large diameter and relatively high pressure relief valve

Details Large diameter and relatively high pressure relief valve Large diameter and relatively high pressure relief valve

1993-03-23

1993-12-28

Fox, John C.

Fluid handling

Destructible or deformable element controlled

Destructible element

137494, F16K 1714

Patent

active

052730654

ABSTRACT:
A pressure relief valve for monitoring pressure in relatively large diameter conductors containing relatively high fluid pressure. The valve having housing openings of equal diameter with respect to the conductor and a flow passageway is provided with different diameter coaxial sleeves slidably receiving dual diameter interconnected pistons. The smaller diameter piston forms a flow passageway stop while the larger diameter piston generates a pressure differential with respect to the smaller diameter piston for moving both pistons toward a flow passageway open position in which a piston rod guides the pistons in their axial movement with respect to the sleeves and collapses a pressure collapsible pin supported by a pin cage connected with the valve body in axial alignment with the piston rod for opening the valve passageway and releasing fluid pressure from the conductor.

REFERENCES:
patent: 4724657 (1988-02-01), Taylor
patent: 4936714 (1990-06-01), Demicray
patent: 5012834 (1991-05-01), Taylor

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