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Fire Extinguishing Systems:
Deluge Valves
Water Spray System
Certain high hazards cannot be controlled or extinguished with ordinary sprinkler systems, but with water spray systems (also say deluge systems). They are typical used in high hazard applications where the need to discharge large quantities of water on the areas of fire.
Applied as a solid stream to burning oil, water is not effective because it plunges below the oil surface and the oil floats on top of the water continuing to vaporize and burn. When broken up into coarse and fine sprays, water becomes our most economical and effective means of extinguishing fire in the medium and heavy oils. When it is broken up into fine, misty spray and when the entire surface of vaporizing liquid can be covered simultaneously, water spray is effective in extinguishing the flames above light oils such as kerosene and, under especially favorable conditions, even some of the lighter petroleum fractions. This is because water in spray form exerts its extinguishing effect at the oil surface before it sinks into the body of the oil.
(From GEM Sprinkler Company's document - Tyco International Ltd. Company)
Types of Water Spray
Applied as a solid stream to burning oil, water is not effective because it plunges below the oil surface and the oil floats on top of the water continuing to vaporize and burn. When broken up into coarse and fine sprays, water becomes our most economical and effective means of extinguishing fire in the medium and heavy oils. When it is broken up into fine, misty spray and when the entire surface of vaporizing liquid can be covered simultaneously, water spray is effective in extinguishing the flames above light oils such as kerosene and, under especially favorable conditions, even some of the lighter petroleum fractions. This is because water in spray form exerts its extinguishing effect at the oil surface before it sinks into the body of the oil.(From GEM Sprinkler Company's document - Tyco International Ltd. Company)
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