The Protectoseal Series 3000 Internal Safety Valves are
intended for use on storage tanks containing flammable or
combustible liquids. Safe and efficient, the valves protect the
tanks and their contents against the hazards of exposure to
fire and provide valuable aid in accident prevention. The
design and operation of the units satisfy those regulations
requiring tanks used to hold flammable or combustible liquids
to be equipped with valves that close automatically when
subjected to fire.