Model 3100 @ Bullock Mfg Pty Ltd

The Bullock Model 3100 Non-return Air Damper is specifically designed to dramatically reduce the back draft of air thought air conditioning or ventilation systems. Made from premium grade extruded aluminium, galvanised steel or graded stainless steel, this model damper can be installed inside rigid ductwork, conditioner plenums or in-line flanged ductwork configurations.
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Model 3100 Non-Return Air Damper.

Single or ganged blade operation.
Mild Steel zinc plated blade pivots or optional 316 stainless steel blade pivot available upon request.
Standard hard wearing long life nylon pivot bushes or optional bronze for elevated temperature systems.
FRAMES
Aluminium 0 6065T-3 extruded "C" shape frame. Size - 35mm x 150mm or 165mm wide.
Galvanised steel - cold rolled 1.6mm thick press punched and tabbed frame.
Size - 25mm or 35mm X 165mm wide, complete with TDF/TDC compatible corners.
Stainless steel - 1.6mm premium grade 304 or 316 stainless steel frame press folded and punched for rigid stability.
Size - 35mm x 165mm wide complete with TDF/TDC corners.
BLADES
Aluminium - 0.8mm sheet, precision cut, press formed to a streamlined airflow friendly design.
Galvanised steel - 0.8mm sheet.
Stainless steel - 0.8mm sheet, grade 304 or 316

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Bullock Model 3100 Non-Return Air Dampers or equivalent shall be installed where shown on the drawings to suit the engineers design specifications. The dampers materials shell be determined according to the systems proximity to aggressive atmospheres, or its active purpose (Note: Dampers must not be installed in the fans turbulent zone.) Blades shall pivot on zinc plated mild steel shafts or 316 stainless steel to suit aggressive atmospheres, and shall not exceed 750mm in width. Hard wearing nylon bushes shall be used to prevent blade seizure or for systems operating at elevated temperatures above 80 deg.C bronze bushes shall be used. Frame design shall be stage and rigid to reduce flex, materials being aluminium, galvanised steel or stainless steel at a minimum 1.6mm thick. Dampers are designed to control airflows not to structurally support the systems ductwork. Hang ductwork to Australian Standards using approved hanging methods to AS4254.

For further information contact your local representative.

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Specifications are subject to change without notice.