N2 Blanket gas controller helps gas pressure to maintain in constant state in the vapor space of storage Tanks. When liquid run out from storage vessel or vacuum state take place because of temperature dropping, N2 Blanket gas controller has a ability of control desired pressure within the fixed limits. Besides above subjects, prevents air and humidity from entering into storage vessel, So it can preserve products, and also protect from a fire. It protects the tank from explosion by restricting spark. It prevents the outflow of fluid by evaporation.