Abstract: Fire control valve through which flows flammable material, such as gas or liquid, includes exteriorly located, replaceable locking pin assembly having a locking pin for locking the valve member of the fire control valve in the open position to enable flow through the fire control valve, the locking pin assembly being also located out of the path of such flow and including a heat-meltable material that holds locking pin in locked position with the valve member and, upon being melted, enables release of locking pin from locked position; the fire control valve including a sealing arrangement to prevent escape of flammable material to atmosphere past valve member and locking pin assembly.