(A) Generally.
(1) All valves shall be furnished with an exterior-finish coating the same as the adjacent piping system to which they are connected or as approved by the town;
(2) Where required for the satisfactory operation of valves, provide extension stems, stem guides, cast iron valve and curb boxes, floor boxes and other valve appurtenances; and
(3) Tee wrench operators shall be provided as required for proper operation.
(B) Plug valves.
(1) Plug valves shall be of the non-lubricated, resilient-seated, eccentric type.
(2) All plug valves shall be of the drip-tight-closing, resilient-faced plug type. Port areas shall be equal to at least 80% of the nominal-size pipe area. Valve bodies, bonnets and plugs shall be constructed of cast iron meeting the requirements of ASTM A126 Class B.
(3) Valves shall be rated for 175 psi up to 12 inches and 150 psi for valves of 14 inches and larger. An adjustable close-position stop shall be provided for field adjustment. The seat end and standard flow direction shall be cast on the valve body.
(4) All shaft seals shall be replaceable without disassembling the valve and while the valve is under system-operating pressure.
(5) The plug shall be of a one- piece design with a precision-molded, resilient facing. The resilient seating surface shall not be in the flow-way pattern when the valve is in the open position. The body seating surface shall be welded nickel overlay containing a minimum of 90% nickel.
(6) All valves and connections shall be ANSI Class 125 flanges.
(7) Valves shall be Series 5000 as manufactured by Val-Matic Valve & Mfg. Corp., Series 100 as manufactured by Dezurik or an equal.
(C) Rubber flapper swing-check valves.
(1) Swing-check valves shall have a cast iron body and cover meeting the requirements of ASTM A126 Class B. The valve body shall have full flow equal to the nominal pipe diameter at any point through the valve. Valves shall be designed for a 175 psi-minimum working pressure. The check valve end sections shall be ANSI Class 125 flanges.
(2) The valve seating surface shall be on a 45-degree angle to minimize disc travel. The disc shall be of one-piece construction and precision molded with an integral O-ring-type sealing surface. The disc shall be made of Buna-N and have a non-slam closing characteristic by means of a 35-degree disc stroke and disc return action.
(3) The check valve shall have backflow capabilities by means of a screw-type backflow actuator.
(4) The interior of the valve shall be coated with an epoxy suitable for potable water.
(5) Rubber flapper swing-check valves shall be as manufactured by Val-Matic Valve and Manufacturing Corp. or an equal.
(Ord. 2010-3, passed 10-6-2010)