Thermally activated pressure relief valve or fuse plug for prote

Details Thermally activated pressure relief valve or fuse plug for prote Thermally activated pressure relief valve or fuse plug for prote

1994-12-21

1999-12-28

Lee, Kevin

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

137 74, F16K 1740

Patent

active

060067748

ABSTRACT:
A novel PRD (pressure relief device) design called fuse plug which is creep-resistant and leakage-free is developed to improve the thermal response of PRD to fire when it is used as a temperature safety device for valves, cylinders, pressurized pipes, or any pressure vessels, the new design being the combination of geometrical configuration of PRD structure and composite technology wherein the low-melting matrix alloy is dispersed with strong/stiff reinforcing agents such as cut-wire type aggregates/cylinders and such composite alloy is contained in a threaded/rugged cavity with the length/diameter ratio being greater than a minimum. The new design employs a disc-type seal T backed by the composite alloy, thus allowing the use of this new design for cylinders of poor thermal conductivity. The trapping of the expelled alloy slug in case of fire with the straight cavity-only design is achieved by using a tee hardware having the secondary venting tube attached to its straight part of tee, the geometry of said tube being curved/angled like a snail or helix or spiral, while the branch-tee is used for the primary venting pipe connection.

REFERENCES:
patent: 3618327 (1971-11-01), Wagner
patent: 4553589 (1985-11-01), Jennings et al.
patent: 5161738 (1992-11-01), Wass
patent: 5197671 (1993-03-01), Wass et al.
patent: 5419357 (1995-05-01), Lhymn et al.
patent: 5511576 (1996-04-01), Borland

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