The Elmac Technologies® patented Cowhorn Arrangement attaches pairs of Flame Arresters & Pressure/Vacuum Relief Valves to a 3-way valve.
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.
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.
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).