Type: Square and Rectangular
Blade Type: 3V Single Skin ; Galvanized Construction
Blade Operation: A-Parallel, B-Opposed, C-Gear Opposed
BETEC CAD. B-21 Series volume control dampers are square and rectangular type with parallel or opposed blade operation having single skin blade design. These dampers are subjected to medium pressure applications to achieve low leakage efficient operation.
The square and rectangular type VCD’s are designed for handling maximum air capacities at minimum pressure drop.
Operating Pressure – 6”w.g (1500Pa.) Max.
Leakage – Class-I (Refer AMCA 500-D-12)
Velocity – 2000fpm (10.1m/s).
6’’x1.18” x 18 gauge (150 x 30 x 1.2mm) thick roll formed galvanized steel ‘C’ Channel with Embossed type for low leakage application.
6” (152 mm) wide, 1.2 mm (18 gauge) thick galvanized steel 3V type roll formed.
Galvanized steel linkages concealed in the frame.
12mm square galvanized steel.
Heavy gauge galvanized steel with position indications Shut, 1/4, 1/2, 3/4,Open.
Neoprene/Foam/Silicone Rubber Gasket*
0.3mm thick Stainless spring steel
Gear wheels are of heat resistant Nylon placed with in the frame instead of mechanical linkage for rattle free smooth operation, operated with PVC knob/Quadrant.
12mm diameter galvanized steel.
Neck adapt or for round duct connections.
Alphabet indicates the type of blade operation
C-Gear Opposed Blade
Frame :Thickness upto 1.5mm
Frame Depth :130 mm Optional
Blade :Thickness upto 1.5mm
Blade Width :Upto 150 mm
Frame and Blade Material :Stainless Steel(304/316L)
Increments of 2” (50mm) possible with combination of 4’’6’’blade width.
Maximum single module size is 48”x48” (1200x1200mm).
Damper, width W > 48” (1200mm) or H > 48” (1200mm), is provided with a center mullion partition.
Dampers of size W or H > 800mm will have blade with stiffener
*Indicates Betec Cad Models Certified by AMCA.