Pressure relief valve with bi-directional seat
AssigneeProserv Gilmore Valve LLC
InventorsAndy Patterson, Gerardo Martinez, Preston Weintraub
Life of this patent
Estimating the term…
Abstract
A pressure relief valve includes a valve body including a monitored pressure inlet leading to a monitored pressure region, a piston having a shear seal bore and a surface facing the monitored pressure region, a vent passage and a the shear seal assembly comprising a seal plate having a sealing surface thereon, and the shear seal assembly includes a sealing surface facing the seal plate and having a first annular area, and a first surface having an annular surface area at least twice as large as the first area of the sealing surface, the first surface facing away from the first area, and a biasing seal in contact with the first surface.
Claims18
A pressure relief valve, comprising:
- a valve body including an inlet having an inlet pressure leading to an inner volume of the valve, a piston having a shear seal bore extending therethrough, a first vent passage and a second vent passage and a T-shaped, in cross-section, first seal plate adaptor having a seal plate surface thereon and a passage therethrough in fluid communication with the first vent passage and a first fluid pressure there present and a T-shaped, in cross-section, second seal plate adaptor having a seal plate surface thereon and a passage therethrough in fluid communication with the second vent passage and a second fluid pressure there present;
- a first shear seal element locatable within the shear seal bore comprising;
- a first seal surface having a first annular area facing the first seal plate adaptor;
- and
- an first annular shear seal element ledge having an annular surface area at least twice as large as the first annular area, the first annular shear seal element ledge facing away from the first annular area;
- a second shear seal element locatable within the shear seal bore comprising:
- a second seal surface having a second annular area facing the second seal plate adaptor;
- and
- a second annular shear seal element ledge having an annular surface area at least twice as large as the second annular area, the second annular shear seal element ledge facing away from the second annular area, wherein the first annular shear seal element ledge face the second annular seal element ledge;
- a biasing seal ring in contact with the first annular shear seal element ledge and the second annular seal element ledge;
- wherein,
- the first seal plate adaptor has a first seal groove having therein a first seal ring and at least one first backing ring;
- and wherein, the second seal plate adaptor has a second seal groove having therein a second seal ring and at least one second backing ring.
Dependencies are inferred from the claim text.