ANSI AWWA C507:2018 pdf free download – Ball Valves, 6 In. Through 60 In. (150 mm Through 1,500 mm)
Sec. 1.2 Purpose
The purpose of this standard is to provide the minimum requirements for 6-in. through 60-in. (150-mm through 1,500-mm) ball valves for water, wastewater, and reclaimed water supply service, including material, design, inspection, testing, marking, handling, and packaging for shipment.
Sec. 1.3 Application
This standard can be referenced in documents for purchasing and receiving ball valves and can be used as a guide for fabricating and assembling ball valves 6 in. through 60 in. (150 mm through 1,500 mm). The requirements set forth herein apply when this document has been referenced and then only to ball valves 6 in. through 60 in. (150 mm through 1,500 mm) for water, wastewater, and reclaimed water supply service applications.
Sec. 1.4 Valve Construction
Ball valves are constructed of gray iron, ductile iron, or steel with corrosion- resistant metal seats or a corrosion-resistant metal seat coupled with a resilient rubber or plastic seat and permanently lubricated bearings. The body is provided with flanged ends for connection to the pipeline. The quarter-turn ball is supported by sleeve bearings located in two trunnion bosses of the body. Closure is made when the ball is rotated, placing the body and ball seats into a metal-to-metal or metal-to-elastomer contact position.
Sec. 1.5 Description of Operation
Ball valves consist of a body and a quarter-turn ball that is held and positioned by a shaft connected to an actuator. The actuator causes the ball to rotate open and throttle flow. In the closed position, differential pressure forces the ball toward the downstream seat. The valve can be operated with a manual gear or screw- and-lever actuator, an electric motor actuator, or a cylinder actuator. The manual gear or screw-and-lever actuator requires a multiturn input on a 2-in. square nut, handwheel, or chainwheel.
4.3.5.1 Flanges. Bodies shall have two flanges. Body flange dimensions for class 150 valves shall have flanges per ASME B16.1, class 125. Body flange dimensions for class 250D valves shall be in accordance with ASME B16.1, class 125 or class 250, except flanges shall be flat-faced. Body flange dimensions for class 300D valves shall be in accordance with ASME B16.1, class 250, except flanges shall be flat-faced.
4.3.5.2 Body port diameter. The body shall have a full, unobstructed circular inlet and outlet port diameter matching the nominal valve size in inches. Port diameter tolerance shall be ±⅛ in. (±3.2 mm) for nominal valve sizes 6 in. (150 mm) through 10 in. (250 mm), ±3/16 in. (±4.8 mm) for nominal valve sizes 12 in. (300 mm) through 18 in. (450 mm), and ±¼ in. (±6.4 mm) for nominal valve sizes 20 in. (500mm) and larger. Note that the nominal metric valve size is based on an approximate conversion of 25 mm/in. rather than the precise 25.4 mm/in. that shall apply to the port diameters and tolerances.
4.3.5.3 Shell thickness. Bodies shall have a minimum shell thickness as shown in Table 2.