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City of Elk River Design Standards <br />hydrant shoe shall also be constructed of ductile iron and shall be fusion bond epoxy coated <br />inside and out prior to assembly for corrosion resistance. <br />C. The main valve closure shall be of the compression type, opening against the pressure <br />and closing with the pressure. Nozzle section to be designed for easy 360-degree rotation <br />by the loosening of no more than four bolts. <br />D. The valve opening diameter shall be 5 % -inch. The hydrant must be designed so that <br />removal of all working parts can be accomplished without excavating. The bronze seat shall <br />be threaded into mating threads of bronze for easy field repair. <br />E. All hydrants shall have a minimum 5-1/4" diameter valve opening. All hydrants shall be <br />configured, unless otherwise noted to have (2) 2-%" hose nozzles and (1) 4-W' steamer <br />nozzle, 1-%" pentagon bronze operating nuts, 6" diameter mechanical joint (MJ) inlet <br />connection. Nozzles shall be retained by a ductile iron collar. Retention of the nozzle by <br />set screws is not allowed. Caps shall be furnished with non -kink chains. All hydrant bolting <br />materials shall comply with the applicable portions of Paragraph3.2.17 of ANSI/AWWA <br />C-502 requiring compliance with ANSI 818.2.1. Metric bolts are not allowed. All bolting <br />below -grade shall be stainless steel. <br />F. The draining system of the hydrant shall be bronze and be positively activated by the main <br />operating rod. Hydrant to be furnished with a sliding bronze drain valve. Sliding drain <br />valves made of rubber, plastic, composition material or leather will not be allowed. <br />G. Hydrant musthave an internal travel stop nut located in the top housing of the hydrant. All <br />hydrant operating threads to be factory lubricated. 0-rings shall be furnished to help <br />keep operating threads lubricated and protected from line fluid and from the weather. <br />H. Hydrant must have a traffic flange design allowing for quick and economical repair of <br />damage resulting from a vehicle's impact. <br />I. All depth of bury lines shall be clearly and permanently marked on the lower barrel of the <br />hydrant. All extensions shall have the ability to be installed without need to shut off the <br />water and limited to one per hydrant. To insure proper fit and tolerances all extensions <br />shall be manufactured by the original hydrant manufacturer. After market extensions <br />and/or parts will not be allowed. <br />J. All fire hydrants shall be the 5 %" Waterous Pacer Model W867-250, as manufactured by <br />AMERICAN Flow Control, or Engineer pre -approved equal. <br />9. Valves <br />A. Valves 2" - 12" shall be of the Resilient Wedge Gate Valve type design. All gate valves <br />shall be rated for 250 psig cold water working pressure, with zero leakage. The rating shall <br />be indelibly marked on the casting. The valves shall comply fully, in all applicable sizes, <br />with the latest edition of ANSI/AWI'VA C-515, as well as all requirements detailed <br />herein. The manufacturer shall provide drawings and/or an affidavit detailing compliance <br />with all applicable standards and specifications, if so requested by the Engineer. All valves <br />shall be of the same manufacturer and shall clearly bear the manufacturer's name and <br />valve size. <br />B. Valves larger than 12-inch shall be butterfly valves. <br />C. All ferrous components of the valve shall be constructed of ductile iron. All valves <br />shall be cast with the words "DI" or "Ductile Iron". The wrench nut shall be constructed of <br />ductile iron, shall have four flats at stem connection to insure even transfer of torque to the <br />stem. <br />D. The wedge shall be ductile iron. It shall be fully encapsulated with EPDM rubber, <br />symmetrical in design and shall seat equally well with flow in either direction. In sizes 4" - <br />48" the wedge shall incorporate the use of guides encapsulated with an engineered <br />plastic. Double disc, metal style solid wedge valves, or designs employing a metal plow style design are <br />not allowed. The valve body guide track shall be of shallow rectangular trough -style <br />design. Guide tracks employing multiple tracks or of a male type design are not allowed. <br />The wedge to stem design on 4" - 48" shall employ the use of an independent stem nut. <br />© City of Elk River, Minnesota — All rights reserved 10 <br />