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Tank Blanketing Valves

Features & Benefits

The Elmac Technologies® Series of Tank Blanketing Valves offer complete protection to the storage tank product against contamination and to the storage tank itself against rupture or damage.

  • 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
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Principle of operation

Tank Blanketing Valve

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.

Standards Compliance

Elmac’s products comply with all relevant industry standards including ATEX & ISO 16852 (Flame Arresters); API 2000/ISO 28300 & NFPA30 (Venting & Storage of Combustible Vapours & Liquids) and possible BLEVE (fire engulfment) incidents. In addition, Elmac is accredited to the following international standards: ISO 9001 (Total Quality Management), ISO 14001 (Environmental Management) and OHSAS 18001 (Occupational Health & Safety).

Enviromental Management Quality Management EX CE
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