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AWWA C520-2019
Knife Gate Valves, Sizes 2 In. (50 mm) Through 96 In. (2,400 mm)
The purpose of this standard is to provide minimum requirements for stainless steel and ductile-iron body knife gate valves with resilient and metal seats, including tapping knife gate valves, for use in water, wastewater, and reclaimed water systems, including materials, design, testing, rejection, marking, and shipping.
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AWWA: American Water Works Association [awwa]
