nFrame: High quality Galvanized Steel sheet of thickness 1.2mm as standard.
nFrame Size: 125mm depth and standard flange height of 25mm.
nBlades: Single skinned 3-V type G.I blade of 1.2mm thickness.
nDrive Shaft: Electro plated square rod of size 12.7mm x 12.7mm.
nBushings: Self-lubricating nylon bushings.
nBlade linkage: Nylon gear/mechanical linkage.
nBlade stopper: G.I angle of thickness 0.7mm.
nHandle: Galvanized Steel locking hand quadrant.
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Designed for use in heating, ventilating and air conditioning systems.
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Both frame and blades are fabricated from high quality G.I sheets(Z-275).
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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 minimize air leakage between the blades.
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Flanged edges are supplied un-drilled as standard.
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Dampers without flanges available as option for duct insertion purpose.
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nOptions:
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Frame: Thickness up to 2mm upon request.
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Blade: Double skin aerofoil type G.I blade of thickness 0.7mm.
