ADP Fire Systems : Home - services

By: Adp Fire Systems  11-11-2011
Keywords: pump, Sprinkler

INSTALLATION

STATIC WATER STORAGE: Every property to be protected by a fire protection system needs sufficient water which should be available at all times to fight the fire.  The static storage is provided at the ground level and terrace level of the building by means of water storage tanks. The storage is provided generally in such a way that the municipal water supply is first received in the fire static storage tank from where it overflows to the domestic tank.  This holds good for overhead storage too. Thus water will always be available in the event of a fire.  The capacity of the underground storage is generally based on at least half an hour's stock of water at the rated draw-off by the fire pump. This tank also serves the purpose of a holding capacity into which water from tankers can be poured through an arrangement of a fire brigade breaching

PUMPING SYSTEM: The pumping system which is the heart of the installation consists of specialized pumps (of approved design) which are fully automated to ensure that water is available throughout the system under the recommended pressure at all times.  Mere opening of a single hydrant landing valve outlet will make water available to fight the fire without having to run to the pump house to start the pump. The resultant drop in pressure in the pipeline automatically triggers a pressure switch which starts the pump.  However, smaller systems may not be required to be automatic. The connection to the system is taken from two sub-stations with changeover contacts. The Lift, the staircase lighting and the fire fighting pump sets are connected in the above manner so that in the event of fire, if the normal source is destroyed, power will still be available through the change over contact.  

 

FIRST AID ACCESSORIES: These consist of a Hose Reel mounted on a swinging drum, fitted at every floor landing in the building. The drum carries a 20/25 mm dia. Rubber hose of required length with a shut-off nozzle attached at the end which can direct a high pressure stream of water at the nook and corner of every room on the floor

 

EXTERNAL & INTERNAL PIPING: External piping is generally provided as a ring main surrounding the property from all sides. The ring main is usually pressurized with water so that in the event of fire, the opening of a single landing valve will make water under pressure available to fight the fire.  Cut-off valves are provided in the ring main to enable the available water pressure to be concentrated at a desired location. At strategic points on the ring mains are provided hydrant stand posts. The hydrant stand post consists of a standpipe which is operated through a valve.  Near the stand post, is placed a hose box containing one or two hose pipes for instantaneous coupling to it. The nozzle attached at the end of the hose delivers water at high pressure in the form of a jet that can be directed at the seat of the fire or at the roof of the building. The internal piping comprises of a riser pipe called the Wet Riser which goes right up to the terrace of the building where it is connected to the overhead water storage.  The riser which may be pressurized also acts as a down-take / down comer to serve the fire fighting operation as the need arises. At every floor, First Aid Hose Reels are provided which ensure that water will be available under pressure at all the corners of every room to fight the fire. The riser is also connected to the static fire storage tank at the terrace level through a Booster pump.  The function of the Booster pump is to pump water from the overhead storage tank and supply the same through the down take at recommended pressure.  The Booster pump is thus also available not only to boost the pressure but also to act as a hydrant pump should the main pump fail to operate and specially to fight the fire from within the building. 

 

SPRINKLER SYSTEMS: A Sprinkler is a device connected to a pressurized network of piping and contains a glass bulb with a special chemical in it.  Sprinklers are available at different ratings and operate at different temperatures.  When a fire takes place, the resultant heat causes the temperature of the chemical in the glass bulb to rise up and expand.  This causes the glass bulb to break and start a spray of water which covers a certain area below the sprinklers so that the fire is fought right when it starts.  The sprinkler network is connected to sprinkler pump, which is connected to a mechanical alarm that rings as soon as the fire pump starts. Alarm rings the moment a single sprinkler operates, thus warning the occupants of an outbreak of fire. The electrical wiring is similar to the main fire pump. Sprinkler systems, by virtue of the fact that they are activated automatically as soon as a fire starts, prevent it's spreading further.  Thus the fire is localized and fought by the system without the help or assistance of occupants and is fully automatic. As the provision of the hydrant / sprinkler system is to help the occupants fight the fire till such a time that the local fire authority reaches the premises, the fire authorities fight the fire using the system provided and the equipment brought by them.  The Fire tender consists of mobile water storage and associated pumping machinery should the premise's water storage get over. A fire brigade collective breaching is provided on the underground static storage tank with instantaneous couplings mounted on them.  Water from the fire tenders can be off loaded to the under ground storage tank by means of hose pipes connected from the fire tender. Fire brigade inlet connection is provided outside the building and near the riser, through a gate valve and a non - return valve.  The pumps of the fire tender can be connected to this inlet through which the water in the fire tender can be pumped up in the building to fight the fire.

FIRE ALARM SYSTEMS: The Fire Alarm System comprises of a Main Control panel which is connected to a network of devices spread throughout the risk. The devices may be sprinklers, flame detectors, heat detectors, smoke detectors etc. Whenever a fire takes place, or smoke is generated, or heat is detected by any one of the detectors on the network, the Control Panel gives an audible alarm at the same time identifying the detector which has sent the signal.  The alarm panel contains a diagram of the property and through an arrangement of classifying zones; it is possible to identify the exact location where the problem has occurred. The alarm panel is a highly sophisticated intelligent control system which eliminates the possibilities of a false alarm. The panel also enables checking of the status of each detector from the control room itself.  The position of each valve (whether open or closed), each section of detectors and the fact whether water is flowing through the pipe line the moment the system is activated or not, can be checked from the control panel. Hooters with Pill Boxes are provided on every floor in the building.  When a fire occurs on a particular floor, the occupant breaks the glass of the Pill Box thus causing the Hooter to give a loud audible alarm. This alarm will also be reflected on the Main Control panel indicating its position, i. e; the floor at which the fire has started.

UNDERTAKING: We undertake complete building maintenance work including fire protection/electrification/house keeping lift and other coalition works. We ensure you for giving our best services at all the times.

Keywords: pump, Sprinkler

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11-11-2011

ADP Fire Systems : Home - products

Ensuring prompt evacuation The Fire Alarm Control Panel is connected to a series of devices like smoke detectors, heat detectors, flame detectors, hooters, pill box, etc. which helps to detect fire and warn people well in advance to take the required action.