Valves equal to M&H/Kennedy Valve Eccentric Plug Valve, or Dezurik PEF. Manufactured Units Eccentric plug valves meeting the requirements of AWWA C517 unless otherwise specified. Port opening area no less than the area of an equivalent nominal diameter round pipe (100% port). Valves shall be of the non-lubricated eccentric type with resilient faced plugs and furnished with end connections as shown on the Plans. Valve bodies shall be ASTM A126 Class B cast iron or ductile iron. The valve seat shall meet one of the following two requirements: 1) seat shall have a ⅛-inch welded overlay of not less than 90 percent pure nickel, with a raised seat area, so that the plug face contacts only nickel; or 2) seat shall be factory-coated with heat-fused thermoset epoxy or thermoplastic nylon in accordance with AWWA C550. The valve plug shall be ASTM A536 ductile iron, faced with neoprene with a cylindrical seating surface eccentrically offset from the center of the plug shaft. Interference between the plug face and the body seat shall be externally adjustable in the field with the valve under pressure and the plug in the closed position. Valves shall have sleeve-type metal bearings and shall be of sintered, oil impregnated, permanently lubricated type 316 ASTM A743 Grade CF-8M.
