Pressure relief device with increased flow rate

Details Pressure relief device with increased flow rate Pressure relief device with increased flow rate

2007-05-01

2007-05-01

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Pop valves

C137S516270, C137S382000, C137S554000, C174S01100R

Reexamination Certificate

active

10741566

ABSTRACT:
A pressure relief device for electrical equipment housing, includes a valve body having a pedestal that projects above a mounting flange and a table on the pedestal that supports a two-stage valve assembly that can be sized in diameter independently of the working area of the flange beneath the table. The design is particularly applicable to retrofit applications for large power distribution equipment with the footprint of the pressure relief device fixed by the design of the equipment housings. The first-stage valve opening can be sized substantially as large as vent openings in the housings and the second-stage valve openings can be sized in the desired relationship with the first-stage opening for optimizing valve performance independently of the constraints imposed by the footprint of the device.

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patent: 5937893 (1999-08-01), Herz
patent: 6497248 (2002-12-01), Herz

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