(A) Valves shall conform to the latest revision of AWWA Standard C-509 covering resilient seated gate valves and be approved by ULFM. The valves shall be non-rising stem, opening by turning stem left and provided with two inch square operating nut with the word “open” and an arrow cast in the metal to indicate direction to open. All bolts shall be stainless steel.
(B) The wedge shall be of cast iron completely encapsulated with rubber. The sealing rubber shall be permanently bonded to the cast iron wedge to meet ASTM tests for rubber metal bond ASTM D429. Stems for NRS assemblies shall be cast bronze with integral collars in full compliance with AWWA. The NRS stem stuffing box shall be the O-ring seal type with two rings located above thrust collar. The two rings shall be replaceable with valve fully open and subjected to full rated working pressure. There shall be two low torque thrust bearings located above and below the stem collar. The stem nut shall be independent of wedge and shall be made of solid bronze. There shall be a smooth, unobstructed waterway free of all pockets, cavities and depressions in the seat area.
(C) The body and bonnet shall be coated with fusion bonded epoxy both interior and exterior. The bonnet and stuffing box bolts shall be 304 stainless steel.
(D) Each valve shall have maker’s name, pressure rating and year in which manufactured cast on the body. Prior to shipment from the factory, each valve shall be tested by hydrostatic pressure equal to requirement for both AWWA (twice the specified working pressure) and 400 PSI ULFM requirements. Approved gate valves are East Jordan Resilient Wedge Valve, Clow Resilient Wedge Valve F-6100 and Mueller Resilient Wedge 2362-23.
(E) All valve boxes shall be cast iron, two piece - five and five-sixteenths inches and shall conform to Sigma Corporation VB 267 for applications outside of pavement and VB 467 for applications in pavement, or engineer approved equivalent.
(F) Valve locations must be marked with an “X” saw cut on curb and the sawcut area shall be spray painted blue.