Orange County NC Website
Browse       Search
collar. The rings shall be replaceable with the valve fully open <br /> and under pressure. <br /> f. Valves shall be designed for horizontal installation with <br /> beveled gear boxes with reduction gears to reduce the <br /> number of turns required to operate valve. Valves shall have <br /> bronze rollers, tracks, and scrapers. <br /> 9. All valves shall be supplied with a bypass as a part of the <br /> valve. Bypass shall be a minimum of 3" diameter with a 3" <br /> resilient seated wedge valve. <br /> B. Valve Boxes: All valve boxes shall be cast iron and shall conform to ASTM <br /> A48. Valve boxes shall be of the adjustable screw type with a base to fit <br /> the valve yoke with a removable cover with the word "water" cast thereon. <br /> C. Eire Hydrants: <br /> 1. Fire hydrants shall comply with all of the applicable requirements of <br /> the AWWA C-502, latest revision, for dry-barrel fire hydrants and <br /> with these specifications. Hydrants shall be of the traffic model type <br /> incorporating a break-away flange arrangement which will permit the <br /> upper section of the hydrant barrel to separate from the lower <br /> section upon impact. Each hydrant shall include an automatic <br /> system designed to lubricate the entire length of the threaded part of <br /> the valve stem each time the hydrant is operated. It shall be further <br /> equipped with "O"-ring seals to insure that threads on the valve stem <br /> do not come into contact with water at any time. <br /> 2. Hydrants shall open counterclockwise with 4-1/2" compression base <br /> valve opening against pressure and be capable of withstanding 250 <br /> psi working pressures and 500 psi hydrostatic test pressures, unless <br /> otherwise specified. The pentagonal operating nut shall be 1-1/2" <br /> from the point to the flat. Hydrants shall be equipped with one (1) <br /> 4-1/2" pumper nozzle and two (2) 2-112" hose nozzles, all with <br /> National Standard Threads per Appendix A of AWWA C-502, and <br /> chained nozzle caps. Nozzles shall be reverse threaded into the fire <br /> hydrant barrel. <br /> 3. Unless otherwise indicated on the plans, all hydrants shall have 6" <br /> mechanical joint bottom connections, 4-1/2" valve openings and a <br /> bury to the bottom of the ditch plus the main line diameter. All <br /> hydrants shall be painted the manufacturer's standard red unless <br /> otherwise specified. Following installation and testing all hydrants <br /> shall be painted with two (2) 6-mil coats of epoxy paint. <br /> Rev. 10/22101 PROJECT#13.01126 02640-Page 4 <br />