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Valves shall be rated for a minimum 150 psi working pressure and a minimum body test pressure of <br /> 300 psi . When closed, the valve shall be drip-tight under rated pressure differential applied alternately <br /> to each side of the gate. <br /> The interior of the valve shall be epoxy lined in accordance with AWWA C550 . The exterior of the <br /> valve shall receive a minimum of two, 2 mill dry film thickness, asphaltic coating. All exterior exposed <br /> bolts, studs, and nuts shall be corrosion resistant, zinc-coated in conformance with ASTM A153 . <br /> 2 . 02 VALVE BOXES <br /> All buried valves shall have cast two or three piece valve boxes with cast iron covers. Valve boxes shall <br /> be provided with suitable heavy bonnets and extend to an elevation at or slightly above the valve <br /> bonnet. The barrel shall be one or two-piece, screw type, having 5 - 1 /4 inch shaft. Covers shall have <br /> "WATER" cast into the top for all water main. All valves shall have actuating nuts extended to within <br /> six inches of the top of valve box cover. All valve boxes shall be set in a square concrete valve box <br /> bonnet in accordance with the Drawings . <br /> PART 3 - EXECUTION OF WORK <br /> 3 .01 Gate valves shall be installed as typical sections of the pipeline. The requirements for pipeline <br /> foundation and backfill shall be followed in all regards when installing buried service gate valves. <br /> 3 .02 Care shall be taken so that the valve box does not transmit loads directly to the valve body. Valve boxes <br /> shall be installed perpendicular and flush with the ground surface as shown on the Plans. <br /> 3 . 03 All gate valves shall be mechanically restrained to the attached pipe sections. Pipe sections both <br /> upstream and downstream of each valve shall be restrained the minimum required length as that shown <br /> for a plug in the Restraint Length Detail on the Drawings . <br /> END OF SECTION <br /> e <br /> 02514 — Gate Valves <br /> 02514- 2 <br />