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US 2020/0224781 A1Published application
Dual poppet pressure relief valve with vacuum adaptor capability
AssigneePREVCO Subsea LLC
InventorsDon CHRISTENSEN, John HEAD
Life of this patent
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Abstract
A pressure relief valve is disclosed with a first stage valve that is in series with a second stage valve, with an enclosed cavity between the first stage valve and the second stage valve. The first stage valve relieves pressure from an enclosure into the enclosed cavity between the stages, when the pressure is above a cracking pressure of the first stage valve. The second stage relieves pressure from the enclosed cavity when the pressure is above the cracking pressure of the second stage valve.
Claims11
A pressure relief valve (PRV) comprising:
- a first poppet;
- and
- a second poppet;
- wherein the first poppet and the second poppet are packaged as one unit and work in series.
1 more element
A Dual Poppet PRV comprising:
- external features that interface with an adaptor and allow the PRV to be opened for at least one of evacuation and backfilling of an enclosure.
A Dual Poppet PRV comprising:
- a first poppet;
- a second poppet;
- and
- an internal coupling between the two poppets.
1 more element
Dependencies are inferred from the claim text.