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Content DescriptionThis standard covers rubber-seated butterfly valves, 3 in. (75 mm) through 72 in. (1,800 mm) in diameter, with various body and end types, for fresh and reclaimed water having a pH range from 6 to 12 and a temperature range from 33° to 125°F (0.6° to 52°C). This standard covers rubber-seated butterfly valves suitable for a maximum steady-state fluid working pressure of 250 psig (1,723 kPa, a maximum steady-state differential pressure of 250 psi (1,723 kPa), and a maximum velocity of 16 ft/s (4.9 m/s). Valves covered by this standard are furnished in four body types and in classes as follows: Wafer valves, Class 150B, in sizes 3 in. – 20 in. (75-500 mm) Short-body and long-body flanged valves in classes 25A, 25B, 75A, 75B, 150A, and 150B, in sizes 3 in. – 72 in. (75 mm – 1,800 mm), and class 250B in sizes 3 in. – 48 in. (75 mm – 1,200 mm) Mechanical-joint-end valves, classes 150B and 250B, in sizes 3-24 in. (75-600 mm), and classes 25A, 25B, 75A, 75B, 150A, 150B, and 250B in sizes 30 in. – 48 in. (750 mm – 1,200 mm) Major revisions to this edition of the standard affect the following: Actuator stroke times Actuator design and sizing marginsThis book also exists in the following packages...Subscription InformationMADCAD.com AWWA Standards & Manuals subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
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About AWWAEstablished in 1881, the American Water Works Association is the oldest and largest nonprofit, scientific and educational organization dedicated to safe and sustainable water in the world. With more than 50,000 members worldwide and 43 Sections in North America, AWWA advances public health, safety and welfare by uniting the efforts of the entire water community. AWWA Offers education to water professionals Advocates for safe and sustainable water Collects and share knowledge Creates volunteering opportunities |
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