nFrame: High quality Galvanized Steel sheet of thickness 1.2mm as standard.
nFrame Size: 125mm depth and standard flange height of 25mm.
nBlades: Double skinned heavy duty extruded Aluminium profiles.
nDrive Shaft: Electro plated square rod of size 12.7mm x 12.7mm.
nBushings: Self-lubricating nylon bushings.
nBlade linkage: Nylon gear.
nBlade stopper: G.I angle of thickness 0.7mm.
nHandle: Galvanized Steel locking hand quadrant.
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Used in heating, ventilating and air conditioning systems for low-leakage applications.
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Joints are welded and protected by aluminium spray coating to prevent rusting.
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Blades are coupled by toothed nylon gears which provides opposed blade operation.
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Hand locking quadrant is provided with clear open/close indication and three intermediate open positions (1/4 – 1/2 – 3/4).
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Foam gasket is sealed across the blade edges to minimise air leakage between the blades.
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Flanged edges are supplied un-drilled as standard.
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Damper without flanges available as option for duct insertion purpose.
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Air leakage from 0.18% to 1.33% only based on tests conducted in accordance with AMCA standard 500-D-98.
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nOptions
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Frame: G.I sheet of thickness up to 2mm available upon request. Aluminium frame is also available for light weight / offshore / exposed area applications.
