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All thermoplastic wafer-style butterfly valves shall be manufactured from PVC Type 1, Grade 1 (ASTM D1784, Cell Classification 12454), CPVC(ASTM D1784, Cell Classification 23447) or glass filled Polypropylene (ASTM D4101, Cell Classification 85580). All valve bodies shall containintegral top mounting flange with dimensions and bolt circles conforming to ISO 5211. Bodies shall contain fully-supported flange bolt holes,be one piece construction and meet ANSI B16.10 narrow face-to-face dimensions in all sizes. If LUGGED butterfly valves are required, lugsshall be over-molded, 316 stainless steel and be the full width of the body. Liners shall be EPDM, Viton® or Nitrile. Liner shall be FULL BOOTdesign, and shall be retained in the body via rib and groove engagement. Liner shall serve as primary disc seal and face seals for mating flanges.Secondary upper bearing and lower seal retainer o-ring seals to be EPDM or FPM. Stem shall be 316 stainless steel, non-wetted and providefull engagement over length of disc. Stem shall have position retention design.
Lever handle shall be trigger-style with 360° interlocking splines allowing the handle to position the disc in 5° increments. Mounting of stopplate for lever handle shall be non-invasive to the valve body and shall not incorporate self tapping screws or other fasteners that connectdirectly to the valve body. Trigger shall contain hole for padlock, as well as slot for cable tie, to lockout valve. Lever handle material to be 30%glass filled Polypropylene with UV Inhibitor.
All sizes of butterfly valves (2" through 12") shall be pressure-rated for 150 PSI at 70°F non-shock.All butterfly valves shall carry a three-year warranty, and shall be manufactured by Hayward Flow Control products in the USA.
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