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ANSI AWWA C507:2018 pdf download.Ball Valves, 6 In. Through 60 In. (150 mm Through 1,500 mm)
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.
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.
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.
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.ANSI AWWA C507 pdf download.