scope:

This standard describes bonneted, bonnetless and one-and two-piece fabricated stainless-steel and cast ductile-iron body knife gate valves with resilient or metal seats, including tapping knife gate valves, for use in water, wastewater, and reclaimed water systems with pH range from 6 to 12 and a temperature range from 33°F to 125°F (0.6°C to 52°C). The minimum design pressure shall be 150 psig (1,034kPa) for nominal sizes 2 in. to 24 in (50 mm-600 mm), and the minimum design pressure for nominal sizes 30 in. to 96 in minimum (750 mm-2,400 mm) shall be 25 psig (172 kPa), 75 psig (517 kPg), and 150 psig (1,034 kPa).

Purpose

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.