Patent ID: 7140591

Claim:
A high pressure post valve removably attachable to a high pressure gas cylinder having a gas outlet opening, said valve comprising: a valve body having an internal aperture for receiving a valve actuator for internal connection and seating within the valve body, said valve body having a threaded extension for threadedly connecting the valve body to the gas cylinder, said threaded extension including a gas inlet orifice in alignment with the internal aperture for the passage of high pressure inlet gas to the valve actuator; said valve actuator including an annular valve seat surrounding a valve cavity, said valve seat disposed at a lower end of the valve actuator, said valve seat being longitudinally movable within the internal aperture in the valve body by manipulation of the valve actuator to open and close the valve inlet orifice, and wherein said valve body includes valve seat material adjacent to and surrounding the gas inlet orifice such that longitudinal movement of the annular valve seat in sealing contact with the valve seat material to close said valve provides sealing of the valve cavity in an area surrounding the gas inlet orifice, and such that longitudinal movement of the valve seat to open the valve prevents any direct contact of high pressure inlet gas against the valve seat material.