Specifications include, but are not limited to: a. Gate edge shall be machined, finished, and rounded and have a 45 degree beveled knife edge. The gate faces shall be finish ground. b. Packing System shall fit a rounded machined packing chamber. c. Packing System shall consist of multiple layers of packing with anti-extrusion plate. The selected packing system shall be for sewage service. The packing gland shall match the valve body. The fasteners shall be type 316 Stainless Steel. d. Body shall be a one piece casting of type 316 stainless steel for corrosive applications. Valve body shall incorporate cast in guides and jams and can handle full reverse pressure without damage. Valve inside port diameter shall be equal to ANSI B36.10 STD pipe inside diameter for both metal and resilient seated valves. Raised faces shall be full width per ASME B16.20 standards for spiral-wound gaskets. Valve body modifications such as bonnets and purges in the chest and/or seat area shall be available.