Fusible link type Fusible link type MOUNTING OF

Fusible link type

Fusible link type

MOUNTING OF SPRINKLER SYSTEMS

FULL CLAMP

LOCKING CLIP

Drencher System • A drencher system is comprised of water heads somewhat similar to these of sprinklers; these may be sealed or unsealed (open drenchers), may be controlled by quick-opening valves operated by less of air pressure in a detector line system in a similar manner to high velocity water spray system. Drenchers are of 3 main types: a. Roof drenchers. b. Wall drenchers. c. Window drenchers

a) roof b) wall c) window drenchers Drenchers may be either open or sealed. Open drenchers are operated simultaneously by the opening of the main valve, while the sealed type are individually actuated in the same way as a sprinkler head.

High Velocity Water Spray System • Its differ from traditional sprinkler systems • It used and installed at the highly flammable danger area • Here flow of water is operated through a mechanism, that called the deluge valve • Used automatically "Actuated Deluge Valve", to control the supply of huge water flow. • Used High Velocity Nozzles to control flow of extreme water, that called "Projectors" • It is used for highly flammable material with 65 degrees Celsius (150 degree F). • It disperses a large and huge volume of water, to control highly flammable material.

Applications & Scope of Area: • • Oil filled high Voltage Transformers. Control of highly flammable liquid & materials. Storage of highly flammable liquids. Warehouses, storerooms, refineries, chemical, wastewater treatment plants and other industrial sectors.

Medium Velocity Water Spray System • Medium Water Spray System is one of main water based fire protection system which is installed to extinguish fires involving liquids with flash point 65 Degree C (150 F) or higher. • The three principles of extinguishing are employed in the system-emulsification, cooling and smothering. The outcome of applying these techniques is to extinguish the fire within a few seconds. • Due to these properties they are used in most industries which are vulnerable to fire. Here in this water spray system, used Medium Velocity Nozzles to control flow of water, called Sprayers.

Applications and Features in: • A full control of flammable liquid fires like: Propane, Toluene, Acetone, Benzene, Butane, Cyclohexane, Butadiene, Xylene, Ethyl alcohol, Methyl acetate, Petroleum spirits, Carbon Disulphide, Ethylene oxide, Light naphtha and more. • Distribution & Electricity Generating Stations for the safety of transformers, oil filled switch-gear and the lubricating system of turbo alternators.

Applications and Features in: • Fires associated oils with flash points above 65°C Medium Velocity Water Spray System is suggested. • It is safe, and immediately convertible into a solvent, to protect from fire, which cannot catch fire. • All oils are water repellent and they cannot be humidified. Accordingly, the cooling action of water adapted in form of jel is insignificant.

Sprinkler pumps

Fire pump, diesel. Jockey pump.

Hydraulic Calculations • Prior to locating the design area, there is the question of how many sprinklers are to be included. This question is primarily addressed by the occupancy hazard classification, but the designer also has some freedom to decide this matter. • Figure 7 -2. 3. 1. 2 of the 1999 edition of NFPA 13 and corresponding figures in NFPA 231 and 231 C contain area/density curves from which the designer can select a design area and density appropriate for the occupancy hazard classification.

NFPA 13 Area/Density Curves

Using the sample area/density curve shown in Figure 4 -3. 1, many different design criteria could be selected, ranging from a density of 0. 1 gpm/ft 2 (3. 7 mm/min) over 5000 ft 2 (500 m 2) to 0. 17 gpm/ft 2 (6. 9 mm/min) over 1500 ft 2 (139 m 2). Either of these two points, or any point to the right of the curve [such as 0. 16 gpm/ft 2 (6. 5 mm/min) over 3000 ft 2 (276 m 2)] would be considered acceptable. A selection of 0. 15 gpm/ft 2 (6. 1 mm/min) over 2400 ft 2 (221 m 2) is indicated.

• Based on the point selected from the sample area/density curve above and the proposed maximum spacing of sprinklers, the number of sprinklers to be included in the design area can be determined. If sprinklers are spaced at 12 x 15 ft (3. 66 x 4. 57 m) so as to each protect an area of 180 ft 2 (16. 72 m 2), the design area of 2400 ft 2 (221 m 2) would include