Patent ID: 8375984

Claim:
A pressure relief valve, comprising: a manifold having a first end, a second end opposite the first end, a first chamber extending from the first end to the second end, and a relief valve assembly housed within the first chamber; and a barrel having a first end, a second end opposite the first end of the barrel, a plurality of chambers, each of which extends from the first end of the barrel to the second end of the barrel, and a plurality of relief pressure load assemblies, each of which is housed within a corresponding one of the plurality of chambers of the barrel, each of the relief pressure load assemblies of the barrel is adapted to be preset to a selected pressure load setting, the first end of the barrel being fastened to the second end of the manifold, whereby when the barrel is rotated relative to the manifold, one of the plurality of chambers of the barrel is moved to a selected position in which it is aligned with the first chamber of the manifold, and the other of the plurality of chambers of the barrel is moved to a deselected position in which it is not aligned with the first chamber of the manifold, and when the one of the plurality of chambers of the barrel is in its selected position, the corresponding relief pressure load assembly housed therein is aligned and within mechanical communication with the relief valve assembly of the manifold.