(A) Description. These specifications are to be used in conjunction with the latest AWWA Standard C509 for ordinary waterworks service.
(B) Materials.
(1) All materials used in the production of gate valves shall conform to the latest AWWA Standards C509, C550, and C153 for valve stem construction, protective interior coatings, and wall thickness respectively.
(2) The valves shall be of the resilient wedge design with a ductile iron wedge fully encapsulated in nitrite rubber except for guide and nut areas and with the body of the valve being ductile iron. The wedge rubber shall be molded and bonded to the ductile iron gate.
(3) For reasons of standardization, valves shall be American Flow Control, Series 2500 Ductile Iron Resilient Wedge valves. Non-rising type stems are required.
(4) End connection configurations shall be either mechanical joints or flanged joints.
(5) The valve body and bonnet shall be epoxy coated, inside and out.
(Ord. 07-57, passed 12-17-2007)