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3. Butterfly Valves (Below Ground) <br />a. Type /Body Style: Wafer designed to be installed between ANSI 125/1504 <br />flanges <br />b. Body: Cast Iron ASTM A -126B <br />c. Disc: Cast Iron ASTM A -126B <br />d. Coating: Epoxy interior and exterior surfaces <br />e. Seats: Buna -N or EPDM <br />f. Shafts: Annealed and smooth turned stainless steel ASTM A -276 Type 304 <br />g. Shaft Bearings: Nonmetallic, low friction type <br />h. Size: See drawings <br />i. Operator: Handwheel <br />j. Design Basis: Waterman VBE2 -W, Mueller or equivalent <br />4. Check Valves <br />a. Type: Flanged <br />b. Conformance: AWWA C508 <br />c. Body:Iton <br />d. Coating: Epoxy interior and exterior surfaces <br />e. Stem Seal: O -ring <br />f. Operator: Swing type, gravity operated <br />g. Pressure: 175 psi <br />h. Size: See drawings <br />i. Design Basis: Mueller A- 2600 -06 or equivalent <br />Combination Air Release Valves <br />a. Application: Water transmission line <br />b. Type: Combination air valve, flanged <br />c. Body: Reinforced nylon <br />d. Seat: Buna -N <br />e. Float: Foamed Polypropylene <br />f. Pressure: 230 psi <br />g. Size/Ends:2" <br />h. Inlet: Threaded <br />i. Drain outlets <br />j. Design Basis: A.R.I. D -040 -P <br />k. Note: No Brass fittings or accessories <br />M. Manual Actuators <br />Provide manual actuators for all valves <br />a. Aboveground: Handwheel <br />1) 6" and smaller: Lever or chain handle <br />2) 8" and larger: Geared actuator <br />b. Underground: Wrench nuts <br />1) AWWA C500 <br />2) Withstand 300 ft. -lbs torque without damage <br />3) OPTION #1 — Provide stem extension with wheel; shall be of quality <br />material <br />4) OPTION #2 — Provide one operating key of sufficient length with handles of <br />sufficient width to operate all buried valves installed on the project; standard <br />2" square operating nut <br />33 1100-4 <br />