UL 1469 BULLETIN-2007《专用回流阀水压损失和主体强度试验UL安全性标准》

These requirements cover backflow special check valves of 3/4-inch (19.1-mm) through 10-inch (254-mm) nominal pipe size used in piping systems supplying water for fire protection service. The backflow special check valves covered by these requirements are intended for installation and use in accordance with the Standards for: a) Low Expansion Foam and Combined Agent Systems, NFPA 11; b) Installation of Sprinkler Systems, NFPA 13; c) Installation of Standpipe and Hose Systems, NFPA 14; d) Water Spray Fixed Systems for Fire Protection, NFPA 15; e) Deluge Foam-Water Sprinkler and Spray Systems, NFPA 16; f) Installation of Centrifugal Fire Pumps, NFPA 20; g) Water Tanks for Private Fire Protection, NFPA 22; and h) Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24. A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard and that involve a risk of fire, electric sho