How does a tank-blanketing valve operate?

How does a tank-blanketing valve operate?
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1 Answer

Answer :

Tank Blanketing Valves provide an effective means of preventing and controlling fires in flammable  liquid storage tanks. Vapors cannot be ignited in the absence of an adequate supply of oxygen. In most  instances, this oxygen is provided by air drawn into the tank from the atmosphere during tank emptying  operations. Tank Blanketing Valves are installed with their inlet connected to a supply of pressurized  inert gas (usually Nitrogen), and their outlet piped into the tank’s vapor space. When the tank pressure  drops below a predetermined level, the blanketing valve opens and allows a flow of inert gas into the  vapor space. The blanketing valve reseals when pressure in the tank has returned to an acceptable level.
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