Patent ID: 8607872

Claim:
A fire prevention valve device mounted to an inside surface of oil field piping below a well head, comprising in combination: a triggering mechanism having a first end comprised of a first rod operatively connected to the well head and further having triggering means integrally formed at a second end; a plunger having a second rod at a first end attached to the triggering mechanism and a plug integrally formed at a second end of the plunger, whereby the plug comprises an outer panel having a sloping surface tapered from the rod to a circular perimeter planer surface defining an outer perimeter of the plug and an inner panel generally dome-shaped in appearance depending downwardly from the circular perimeter planer surface; a valve seat having an upper interior planer surface and a lower interior planer surface, whereby the upper interior planer surface is smaller in diameter and concentrically located with respect to the lower interior planer surface, and a passage formed therethrough to allow the flow of oil and to align the plunger, and whereby the plug is aligned below the valve seat; a spring aligned below the valve seat, and whereby the inner panel of the plug is positioned on the spring whereby the trigger mechanism and the second plunger are pressed downwardly by the wellhead, and in turn compresses the spring downwardly; and whereby when the triggering means of the triggering mechanism is destroyed the spring urges the plug upwardly against the valve seat stopping the flow of oil.