C504-80: AWWA Standard for Rubber-Seated Butterfly Valves (PDF)

This standard covers cast iron and ductile iron body, rubber seated, tight closure butterfly valves, 3-72 in. in size, with various body types and body ends for maximum shutoff pressures and operating torques, and for fresh water having pH greater than 6 and temperatures generally less than 125�F (52�C). Valves covered by this standard are furnished in four body types and in classes of wafer valves, short-body flanged valves, long-body valves, and mechanical-joint-end valves. Also included are sections on the following: references, data supplied by bidder, data supplied by manufacturer, affidavit of compliance; materials specifications including physical and chemical properties, tests; general design, valve bodies, end flanges, valve shafts, valve discs, valve seats, valve bearings, shaft seals, valve operators; workmanship and painting; inspection, performance tests, leakage tests, hydrostatic test, proof-of-design tests, and basis for rejection; marking and shipping. The appendix includes a method for calculating torque required to operate butterfly valves.