C504-00: AWWA Standard for Rubber-Seated Butterfly Valves
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C504-00: AWWA Standard for Rubber-Seated Butterfly Valves

C504-00: AWWA Standard for Rubber-Seated Butterfly Valves

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This standard establishes minimum requirements for rubber-seated butterfly valves, 3 in. (75 mm) through 72 in. (1,800 mm) in diameter, with various body and end types, for fresh water having a pH range from 6-12 and a temperature range from 33 degrees to 125 degrees F (0.6 degrees to 52 degrees C). This standard covers rubber-seated butterfly valves suitable for a maximum steady-state fluid working pressure of 250 psig (1,723 kPa [gauge]), a maximum steady-state differential pressure of 250 psi (1,723 kPa), and a maximum full open velocity of 16 ft/sec (4.9 m/sec). Body types, classes, and sizes: valves described in this standard are provided in four body types and in classes as follows: wafer valves, class 150B, in sizes 3-20 in. (75-500 mm); short-body flanged valves, classes 25A, 25B, 75A, 75B, 150A, and 150B in sizes 3-72 in. (75-1,800 mm) and class 250B in sizes 3-48 in. (75-1,200 mm); long-body flanged valves: classes 75A, 75B, 150A, and 150B in sizes 3-72 in. (75-1,800 mm); mechanical-joint-end valves: classes 150B and 250B, in sizes 3-24 in. (75-600mm), and classes 25A, 25B, 75A, 75B, 150A, 150B, and 250B in sizes 30-48 in. (750-1,200 mm); definition of classification: in each case, the numeric designation represents the pressure rating (the maximum steady-state fluid working pressure, in pounds-per-square-inch gauge) and also the maximum steady-state differential pressure, in pounds per square inch, for which the valve is designed. The designations "A" and "B" define the flow-rate capabilities with the valve in the fully open position. "A" valves are rated for a maximum velocity of 8 ft/sec (2.4 m/sec), and "B" valves are rated for a maximum velocity of 16 ft/sec (4.9 m/sec) in the piping section upstream of the valve. Major revisions in this edition of AWWA C504 include the following: class 250 valves were added; Table 4, "Shaft Torque Capabilities," was deleted. Shaft torque capabilities are given by minimum sizes listed in Table 3 and the maximum stresses given in Sec. 4.5.3.3; the design and testing requirements for cylinder actuators given in Sec. 3.8.7 were deleted and reference to AWWA Standard C540 was added; and, reference to the use of carbon-steel shafts with stainless steel journals was deleted.
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Item Details:
This standard establishes minimum requirements for rubber-seated butterfly valves, 3 in. (75 mm) through 72 in. (1,800 mm) in diameter, with various body and end types, for fresh water having a pH range from 6-12 and a temperature range from 33 degrees to 125 degrees F (0.6 degrees to 52 degrees...
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