Storage Tank Blanketing Valves

Product Description

Principle of Operation
The operating principle of the tank blanketing valve is to maintain a positive pressure within an enclosed storage tank by introducing a gas such as nitrogen into the vapour space above the product at a required pressure.

This ‘blanket’ prevents the stored product from vaporising into the atmosphere, prevents contamination to the stored product and also helps to reduce product combustibility by eliminating oxygen-rich air.

The valve also offers primary vacuum relief for the storage tank, acting as a pressure regulator. It does this by supplying gas to the vapour space when pressure decreases within the tank to the valve’s set point.

Once the gas blanket is re-established to the required pressure the valve closes.

Features and Benefits

• Range of sizes available from 15mm to 50mm
• All parts that come into contact with the product consist of stainless steel or Hastelloy with smooth surfaces
• The valve is manufactured in an oil and grease-free environment, is self-actuating and no control line is needed for operation
• The inert (oxygen-free) atmosphere reduces the risk of fire which could reduce the cost of your insurance premium
• Tank corrosion is reduced
• Reduction from very high primary pressure (up to 16 bar) to very low setting of 2 mbar
• High accuracy settings achieved, in order to avoid any interaction with relief valves
• Metal parts in 316 Stainless Steel
• Seals & gaskets in Buna-N, Neoprene, Viton®, EPDM, Chemraz® or Kalrez®