Water Spray System is a special fixed pipe system connected to a reliable source of pressurised water supply and equipped with water spray nozzles for application on area / equipment to be protected. The system can be operated automatically by connection to an automatic detection and alarm system or manually, or both. These systems can be used for any one or more of the under mentioned purposes:
• Extinguishment of fire; • Prevention of fire (cooling).
• Control of fire; • Exposure protection (cooling);
The suppression or extinguishment of fire is achieved by cooling, dilution of oxygen supplies (smothering), dilution (or removal) of the liquid fuel (starvation or emulsification).
Water spray systems are generally used for fire protection of flammable liquid and gas storage tanks, piping, pumping equipment, electrical equipment such as transformers, oil switches, rotating electrical machinery etc. and for protection of openings in fire walls and floors.
The type of water spray required will depend on the nature of the hazard and protection required.
Types of water spray systems:
There are two basic types of water spray systems installed as fixed systems. One of these is used to extinguish oil fires and usually referred to as .Water Spray Projector System.; the other is mainly used to provide protection to plant, processes, equipment, and to prevent explosions, and is generally known as a .Water Spray Protector System
This system applies water in finely divided droplets at medium velocity. This is mainly used for fire protection of areas with fire risks from low FP flammable liquids (FP below 65oC) and also for fire extinguishment of water miscible liquids (polar solvents, alcohols etc.). It gives protection to tanks, structures, equipments etc. by cooling, by controlled burning of flammable liquids and also by dilution of explosive gases. We offer best Design & Engineering of an integrated MVW spray system as per national/ international standard and guidelines. During designing we consider that adequate coverage of the entire unit shall cover by MVW spray system. Our designed system in accordance to international standards is an arrangement of Piping, Deluge & Automatic Value, Nozzle, Q.B. Detectors etc. to make an automatic or manually actuated fixed pipe system connected to a water supply to provide a specific water discharge and distribution over the protected surface of area. We design water spray system as per national and international Standards/ guidelines. |
|
This is generally used for extinction of fires in flammable medium and heavy oils or similar flammable liquids having a flashpoint above 65oC. (eg: Transformer fires) The system projects water in the form of a conical spray, with the droplets of water travelling at high velocity. Extinguishment is achieved by the three principles of emulsification, cooling and smothering.
Some of the water droplets while passing through the flames get converted into steam, thereby achieving the smothering effect. The high velocity sprays of water are discharged through specially designed projectors. These systems can be operated either manually or automatically.
The water spray systems should have isolation facilities so as to enable periodic testing, maintenance etc. Normally, all cut-off valves should be locked open. The high velocity water spray system for transformer protection operates on the same principle as a deluge system. The detectors mounted on a separate pipeline on detecting the fire releases the compressed air within the pipe, thereby operating the deluge valve. This allows the water to flow out through the projectors in the form of high velocity water spray and extinguishes the fire. Generally, a water motor operated gong (as in the case of sprinkler systems) sounds the fire alarm. Sometimes, additionally an electrical alarm may also be provided.
We offer best Design & Engineering of an integrated HVW spray system as per national/ international standard and guidelines. During designing we consider that adequate coverage of the entire transformer unit including the conservation tanks; the bushings and the bottom area shall cover by HVW spray system.
Our designed system in accordance to international standards is an arrangement of Piping, Deluge & Automatic Value, Nozzle, Q.B. Detectors etc. to make an automatic or manually actuated fixed pipe system connected to a water supply to provide a specific water discharge and distribution over the protected surface of area.
