Patent ID: 8307847
Filing Date: 2012-11-13
Classification: F16K,Y10T

Abstract:
1. A method for limiting pressure in a vessel employing a stand alone pressure relief valve attached to the vessel comprising: attaching a stand alone pressure relief valve to a pressurizable vessel so that the valve is in a closed position, holding the valve in the closed position by engagement of inwardly extending staging glands provided on an interior surface of a sleeve structure of the valve which are engaged by buckling glands that are provided on an exterior surface of a slightly deformable hollow ejector of the valve where the ejector is configured to slidably fit into a passage defined by the sleeve structure of the relief valve and to move between a closed position and an open position where pressure is released from the vessel, and exerting increasing pressure on the vessel and the attached valve until the pressure pushing the ejector to move longitudinally in the sleeve overcomes the frictional resistance to longitudinal movement of the ejector within the sleeve structure by deforming the buckling glands inwardly so that the buckling glands pass by the staging glands thereby causing the valve to move to its open position and relieving the pressure on the vessel.