Medium velocity water spray systems are installed to control the burning and to provide cooling andor exposure protection to such risks where extinguishment is always not possible or even desirable, for example, fires involving flammable fluids having flash points below 65c. Design and installation of fixed automatic high and medium velocity water spray system code of practice. Mvws, is generally used in oil based systems, having low flash points. Nfpa 15 is the standard for water spray fixed systems for fire protection. High velocity water spray system fire knock youtube. The water is uniformly distributed over the surface to be protected. Jul 30, 2015 medium velocity water spray systems mvwss are used for fire protection of areas with fire risks from low fp flammable liquids fp below 65 degree c and also for fire extinguishment of water. The hd medium velocity water spray nozzles are open type nonautomatic nozzles, designed for directional spray application in fixed fire protection system. Medium velocity water spray system is designed to control fires involving the lighter oils, liquefied petroleum gases and other flammable liquids with flash points below 650 c. The lifeco medium velocity water spray nozzles are open type nonautomatic nozzles, designed for directional spray application in fixed fire protection system. Design and installation of fixed automatic high and medium velocity water spray system code of practice number of amendments. The gw premium quality range of water spray nozzles is designed for use in professionally engineered deluge fire protection systems.
Deluge water spray systems designed according to nfpa 15. This spray system discharges a special cone of water spray including medium drops of water. Medium velocity water spray systems mvwss are used for fire protection of areas with fire risks from low fp flammable liquids fp below 65 degree c and also for. High velocity water spray system a high velocity water spray system is useful in oil based system and is installed to suppress fires involving liquids above 65c or high flash points. On this account the high velocity water spray system can only be put forward in such cases after a full enquiry into all the circumstances. Medium velocity water spray mvws system electrical4u. Our high velocity water spray nozzles are internal swirl plate type, which produce a high velocity water spray. Jul 27, 2014 medium velocity water spray systems are installed to control the burning and to provide cooling andor exposure protection to such risks where extinguishment is always not possible or even.
What is difference between medium velocity water spray. Mvws medium velocity water spray system universal fire. Oct 04, 2010 medium velocity water spray system is designed to control fires involving the lighter oils, liquefied petroleum gases and other flammable liquids with flash points below 650 c. Transformer fires the system projects water in the form of a conical spray, with the droplets of water travelling at high velocity. The velocity of the water droplets discharged from spray nozzles is not a factor for consideration of water spray system design within nfpa 15 or. An automated water spray system where the water distribution piping is equipped with open spray nozzles for discharging over a protection area or equipment. Type d3 protectospray directional spray nozzles, open, medium.
Legally binding document step out from the old to the newjawaharlal nehru invent a new india using knowledge. Medium velocity water spray nozzle has an external deflector, which discharges water in a. Guidelines of regional tariff advisory committee tac rls. High velocity water spray system,high velocity water spray. The nozzle is used in deluge water spray system for special hazard fire. Deluge water spray systems designed according to nfpa 15, api 2030, ip 19 guidelines and local regulations.
Fire water spray systems principle instrumentation tools. High velocity water spray nozzel, medium velocity water spray. Medium velocity water spray system medium velocity water. A water spray system is an automatic or manual actuated fixed pipe system connected to a water supply and equipped with water spray nozzles designed to provide a specific water discharge and distribution over the protected surfaces or. High velocity water spray nozzles, this system works uniquely effective against fire hazards involving heavy or medium oil. The type of nozzle, the flow rate, and discharge angle is determined by the type of risk involved. The nozzle is used in deluge water spray system for special hazard fire protection. The nozzles are effectively designed to apply water. Wholesale supplier of medium velocity water spray system medium velocity water spray system mvws for flammable gas storage tanks offered by tri parulex fire protection systems, ghaziabad, uttar pradesh. Medium velocity water spray systems are installed to control the burning and to provide cooling andor exposure protection to such risks where extinguishment is always not possible or even. Medium velocity water spray systems mvwss are used for fire protection of areas with fire risks from low fp flammable liquids fp below 65 degree c and also for fire extinguishment of water. Type d3 protectospray directional spray nozzles, open. Design and installation of fixed automatic high and medium velocity water spray systemcode of practice. Mvws medium velocity water spray system introduction.
The velocity of the water sprays, hitting the system under fire is critical. Nozzles are normally used to cool the surface as well as for extinguishment. Standard for report of committee on water spray fixed systems. Cooling smothering and dilution play apart in varying degrees with such a system and a well known example of such a system is the protectospra system. High velocity water spray nozzles are typically used for deluge protection of special hazards such as oil filled transformers, switchgear, chemical process equipments, conveyor system and flammable liquid storage areas. There are two variants of water spray system, for fire protection. The shield medium velocity water spray nozzles are open type nonautomatic nozzles, designed for directional spray application in fixed fire protection system. Fire fighting ced 22 designator of legally binding document. Fire protection manual or booklet on rules governing fire protection systems, was first published in 1906 by calcutta fire insurance association and the edition of 1993 is published by the oriental insurance co. Pdf waterspray systems for fire protection v1 rick. Medium velocity water spray system fire knock youtube.
Standard for report of committee on water spray fixed. Medium velocity water spray nozzle has an external r, which discharges water in a directional cone shaped pattern of small droplet size. Nasa images solar system collection ames research center brooklyn museum is 15325. Guidelines of regional tariff advisory committee tac. However, terms referencing velocity are used extensively within manufacturers technical data and within the testing. Medium velocity water spray nozzle shield fire, safety. An mvws system short for a medium velocity water spray system is a water based fire protection system. Med velocity water spray fireguard safety equipment co ltd. High velocity water spray nozzle these nozzles are designed to be installed in groups or zones of protection and operate simultaneously to rapidly extinguish high intensity oil fires. Hvws, is generally used in oil based systems, having high flash points.
Medium velocity water spray nozzle, water curtain nozzles. Ideal for providing exposure protection in special and high hazard applications, such as. Mvws systems are used to provide cooling andor control the burning in many large scale industrial applications, such as in thermal power plants as their name suggests, medium velocity water spray nozzles are designed to spray water at a medium velocity i. Naffco offers the mvws nozzles are open type nonautomatic nozzles, designed for directional spray application, used in fixed deluge water spray system for special hazard fire protection application. A medium velocity water spray system comprises a network of open spray nozzles which are connected with a specific deflector to ensure required angle to disperse water around the area affected by fire. This is generally used for extinction of fires in flammable medium and heavy oils or similar flammable liquids having a flashpoint above 65oc. Mvws systems are used to provide cooling andor control the burning in many large scale industrial applications, such as in thermal power plants. Hence this distributes the water uniformly on the surface that is to be protected. Specialised high and medium velocity water spray systems. A high velocity water spray system is useful in oil based system and is installed to suppress fires involving liquids above 65c or high flash points. It works on three basic principles of fire extinguishing which are emulsification, cooling and smothering which results in rapid suppression of fire within seconds. Design and installation of fixed automatic high and medium velocity water spray system code of practice by bureau of indian standards publication date 2003 name of standards organization. In some applications, depending on water design density requirements, the type mv nozzles may also be used for fire control or extinguishment.
The nozzle is used in deluge water spray system for special hazard e protection application. A water spray system is a special fixed pipe system connected to a reliable source of fire protection water supply, and equipped with water spray nozzles for specific water discharge and distribution over the surface or area to be protected. High velocity water spray nozzles this system works uniquely effective against fire hazards involving heavy or medium oil. The committee means the regional committee at the regional office of the tariff advisory committee tac. High velocity water spray system this is generally used for extinction of fires in flammable medium and heavy oils or similar flammable liquids having a flashpoint above 65oc. High velocity water spray nozzel, medium velocity water. The medium velocity water spray nozzles have an external deflector, which provides a small droplet size by discharging water in directional cone shape. Medium velocity water spray nozzle has an external deflector, which discharges water in a directional cone shaped pattern of small droplet size. They are external deflectortype nozzles that discharge a uniformly filled cone of medium velocity water droplets. Fires on hydrocarbon are more frequent due to the volatility of the hydrocarbon and its property to not dissolve with water and lighter than water the fire extinguishing of hydrocarbon fire with water is not possible.
34 523 1385 664 85 808 1226 638 1584 394 347 1554 531 925 830 1376 504 170 734 677 432 1545 243 1148 906 1184 1523 1385 639 1103 993 1596 1009 970 566 574 658 550 1317