ANSI/AWWA C518-2008
给水厂设备用双垫圈回转止回阀
Dual-Disc Swing-Check Valves for Waterworks Service
ANSI/AWWA C518-2008 中，可能用到以下仪器设备
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- 标准号
- ANSI/AWWA C518-2008
- 发布日期
- 2008年01月27日
- 实施日期
- 2008年10月01日
- 废止日期
- 无
- 中国标准分类号
- J16
- 发布单位
- US-AWWA
- 引用标准
- ASME B16.1 ANSI/AWWA C550 ANSI/AWWA C606 ASTM A48 ASTM A126 ASTM A240 ASTM A276 ASTM A313 ASTM A395 ASTM A536 ASTM A743 ASTM B62 ASTM B584 ASTM B763 ASTM D395 ASTM D429 ASTM D471 ASTM D1149 MSS SP-6
- 适用范围
- This standard establishes minimum requirements for dual-disc swing-check valves, 2-in. (50-mm) through 48-in. (1,200-mm) NPS for clean water having a pH range from 6 to 10 and a temperature range of 33~-125~F (0.6~-52~C). 1.1.1 Body types. Valves described in this standard are provided with wafer or threaded-lug ends for installation between ANSI Class 125 flanges or grooved ends for use with IPS pressure pipe. 1.1.2 Gray-iron pressure ratings. "l-he minimum design working water pressure for gray-iron valves shall be 200 psig (1,380 kPa) for 2-in. through 12-in. (50-mm through 300-mm) sizes and 150 psig (1,030 kPa) for 14-in. through 48-in. (350-mm through 1,200-mm) sizes. 1.1.3 Ductile-iron pressure ratings. The minimum design working water pressure for ductile-iron valves shall be 250 psig (1,380 kPa) for 2-in. through 48-in. (50-mm through 1,200-mm) sizes. 1.1.4 Fluid velocity rating. The maximum fluid velocity shall be 16 ft/sec (4.9 m/sec). 1.1.5 Installations. Dual-disc swing-check valves are designed for installation in horizontal pipelines and in vertical lines with flow in the upward direction. Valves must be installed with hinge pins in the vertical position for horizontal pipeline installations. ~he valves are not approved for installations in vertical lines with flow down where valve closure may not occur. 1.1.6 Excepted conditions. Conditions of water hammer, hydraulic pulsa- tion, and excessive noise are beyond the scope of this standard and require special design and construction consideration.