Rectangular duct dampers
[DOCX File]Section 23 31 00 - HVAC DUCTS AND CASINGS
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approved in advance, round and flat oval duct, with size converted on the basis of equal pressure drop, may be furnished in lieu of rectangular duct design shown on the drawings. 1.Elbows: Diameters 80 through 200 mm (3 through 8 inches) shall be two sections die stamped, all others shall be gored construction, maximum 18 degree angle, with all ...
[DOCX File]Section 23 31 00 - HVAC DUCTS AND CASINGS
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Install volume dampers at points on supply, return, and exhaust systems where branches extend from larger ducts. Where dampers are installed in ducts having duct liner, install dampers with hat channels of same depth as liner and terminate liner with nosing at hat channel.
[DOC File]SECTION 233113 - METAL DUCTS
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Metal, rectangular ducts and fittings for supply, return, and exhaust air-distribution systems in pressure classes from . minus 2- to plus 10-inch wg (minus 500 to plus 2500 Pa). Sealants and gaskets. Hangers and supports. See Division 23 Section "Air Duct Accessories" for dampers …
[DOC File]Thermal Process and Mild Steel Pipework - eCollege
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Iris dampers are available for circular ducts only, in diameters up to 800 mm (It should be noted that the damper casing is approximately twice the diameter of the duct). Backdraft Dampers. Air pressure operated unidirectional rectangular (single or multi-blade) with adaptors if fitted to circular or oval ducts. Hit and Miss Dampers
[DOC File]Dampers - Balancing
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Single Blade Dampers. Fabricate from same material as duct, 0.8 mm up to 450 mm wide, 1.6 mm maximum up to 1200 mm wide, V-groove stiffened. Size and configuration to recommendations of SMACNA, except maximum height 100 mm. Locking quadrant with shaft extension to accommodate insulation thickness. Inside and outside nylon or bronze end bearings.
Section 15820 - Dampers
Round VAV zone control dampers. Rectangular VAV zone control dampers. Round cable drive zone control dampers. Rectangular cable drive zone control dampers. ... Tighten (2) set screws onto damper shaft with furnished 1/8 inch allen key, then secure to duct or mounting plate. Assembly mounts horizontally or vertically as required for best cable ...
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