Patent ID: 8327868

Claim:
A cylinder valve with a thermal relief feature for use with a cylinder containing fluid under pressure, said cylinder valve comprising: a valve body configured for releasable connection to the cylinder; said valve body having a front end, a back end, a flow passage extending through the valve body from the front end to the back end for fluid communication with an interior of the cylinder when the valve body is connected to the cylinder, and valve body surfaces which are exposed to fluid in the cylinder when the valve is connected to the cylinder; a valve in the flow passage movable between open and closed positions; a vent passage in the valve body separate from the flow passage for venting fluid under pressure from said cylinder; and a temperature relief insert in the vent passage, said insert comprising an insert body, a bore through the insert body, and a thermal relief material in the bore blocking flow through the bore until a predetermined venting temperature is reached whereupon said thermal relief material is adapted to change from a solid state to a more liquid state to allow venting of the cylinder through said bore and said vent passage; wherein the valve body does not contain brass; and wherein the insert body comprises brass covered by a metal plating not containing brass.