Aluminium - 6060T5 - "C" type design 35mm x 165mm x 1.8mm thick extrusion.
Stainless / Galvanised Steel - "C" type TDF/TDC 23mm x 165mm x 1.6mm thick or "H" type 25mm, 35mm or 50mm x 215mm x 1.6mm thick. Welded corners have been innovatively phased out with the introduction of the Bullock corner gussets for aluminium dampers. These assist in frame strengthening while allowing expansion in elevated temperature situations.
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Aluminium - 6060T5 - Extruded 1.6mm thick streamline edge design for ultra low airflow resistance's and the available option for added blade seals on both edges to minimize leakage. Oppose blade rotation is standard, parallel action is optional. Stainless / Galvanized steel - precision cut 1.6mm die and press formed, the interlocking blade tip designs give the blades longitude blade strength and a flat metal blade seal. In the open position blades fit wholly within the damper frame. Please note that Model 6700 Steel and Stainless steel blade combination do not as yet come with blade tip seals.
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All side blade seals are of series 300 stainless steel, alleviating the problem of "aggravated corrosion" of seals through blade swiping action. Blade tips seals are optional silicon seals with a serviceable temperature of up to 220 degrees Celsius or standard blade seal.
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Hexagonal 13mm zinc die cast design is mechanically fixed to the blades ends. Rotating pivot / drive collar is 16mm diameter stainless steel providing strength., durability and ease of service for bearings. The actuator drive shaft is 12.7mm diameter zinc plated mild steel or optional stainless steel.
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Sintered bronze 16mm diameter x 4mm thick "top hat" design to suit the 16mm diameter stainless steel pivot collars. These sit flush in a counter sunk frame seat providing strength to the frame penetration and giving precise bearing positioning. Polysulfone, which has a service temperature range up to 160 degree Celsius.
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Blade linkages have been designed as an external operating system within the frame channel. 3mm aluminium / stainless steel / galvanized steel triangular plate design mechanically lock onto each blade pivot, interconnecting 2mm angles and 1.8mm linkage bar connectors are driven off 6mm stainless steel pivot pin and bearing combinations giving a smooth blade rotation from open to close positions.
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AIR LEAKAGE - Damper leakage tests to verify performance of the model's blade sealing system. The results show ultra low leakage rates.
ELEVATED TEMPERATURES: Independent testing of the aluminium model was carried out for durability in compliance with AS1668 for smoke dampers. No visible signs of damage or distortion were noted in the test where temperatures were recorded at 200 degree Celsius for a duration of 2 hours.
Copy of these tests are available from your local Bullock representative in your state.
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Correct installation is critical for proper operation and long life of air control dampers. Refer to installations to avoid on-site delays through incorrect procedures. NOTE: Volume dampers are designed to control airflow always ensure ductwork or plenums are self supported and installed to AS4254 accepted methods.
INCORRECT INSTALLATION VOIDS ALL WARRANTIES.
Maintain dampers in accordance with AS1851.6 if required.
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