Rupture disk for fire safe valves

Details Rupture disk for fire safe valves Rupture disk for fire safe valves

1993-06-10

1994-03-08

Rivell, John

Fluid handling

Processes

Involving pressure control

137 681, 251327, F16K 1714, F16K 1738

Patent

active

052919129

ABSTRACT:
A gate valve has a relief passage to prevent excessive pressure buildup in the cavity of the body in the event of a fire. The gate valve has an upstream passage side and a downstream passage side that intersect the cavity. Seat rings are located at the intersection of the upstream and downstream passage sides with the cavity. A split gate moves between open and closed positions with the seat rings. A relief passage extends from the cavity to the upstream passage side. A frangible device locates in the relief passage to block flow during normal operation. If the pressure differential between the cavity and the upstream side exceeds a selected minimum, the frangible member breaks, allowing flow through the relief passage. This relieves pressure in the cavity.

REFERENCES:
patent: 3060964 (1962-10-01), Bagwell
patent: 3307574 (1967-03-01), Anderson
patent: 3765440 (1973-10-01), Grove et al.
patent: 4314579 (1982-02-01), Wheatley et al.
patent: 4393889 (1983-07-01), Binegar et al.
patent: 4515174 (1985-05-01), Hollister et al.

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