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Orange County Health Department Improvements Smith Sinnett /2024008 <br />Hillsborough,NC Orange County Asset Management Services <br />AIR DUCT ACCESSORIES 23 33 00 - 4 <br />2.Temperature:180°F <br />3.Leakage:4 cfm/ft2 @ 1 in.wg <br />4.Construction: <br />a.Frame Material -Galvanized Steel <br />b.Frame Thickness:20 gauge <br />c.Blade Material:Galvanized Steel <br />d.Blade seal:Silicone <br />e.Axle Bearings:Bronze​​ <br />f.Axle Material:Plated Steel <br />g.Operaror:3/8 inch sq.locking manual quandrant. <br />1)On insulated ducts,provide 2 inch standoff bracket <br />5.Manufacturers: <br />a.Greenheck VCDR-53 <br />b.Ruskin <br />c.Nailor <br />E Rectangular Multi-Blade Balancing Dampers:2 in w.g.and below <br />1.Pressure:Up to 4 in w.g. <br />2.Velocity:2,000 fpm <br />3.Temperature:180°F <br />4.Construction: <br />a.Frame Material -​​Galvanized Steel​​ <br />b.Frame Thickness:16 gauge <br />c.Blade Material:Galvanized Steel <br />d.Blade Thickness:16 gauge <br />e.Blade Type:3V <br />f.Blade Operation:Opposed <br />g.Axle Bearings:Synthetic sleeve type <br />h.Axle Material:​​Plated Steel​​ <br />i.Operaror:1/2 inch locking manual quandrant,1-1/2 inch long standoff bracket <br />j.Extension Pin:1/2 inch diagonal glass reinforced polymer extends 3-1/2 inch beyond frame <br />5.Manufacturers: <br />a.Greenheck MBD-15 <br />b.Ruskin <br />c.Nailor <br />F Quadrants: <br />1.Provide locking,indicating quadrant regulators on single and multi-blade dampers. <br />2.On insulated ducts mount quadrant regulators on stand-off mounting brackets,bases,or adapters. <br />3.Where rod lengths exceed 30 inches provide regulator at both ends. <br />2.08 MISCELLANEOUS PRODUCTS <br />A Internal Strut End Plugs: Combination end-mounting and sealing plugs for metal conduit used as internal <br />reinforcement struts for metal ducts;plug crimped inside conduit with outside gasketed washer seal. <br />B Duct Opening Closure Film: Mold-resistant,self-adhesive film to keep debris out of ducts during <br />construction. <br />1.Thickness: 2 mils. <br />2.High tack water based adhesive. <br />3.UV stable light blue color. <br />4.Elongation Before Break: 325 percent,minimum. <br />5.Manufacturers: <br />a.Carlisle HVAC Products​;Dynair Duct Protection Film​ <br />Docusign Envelope ID: 2D852F9B-A7CF-462A-9536-444A53AA848A