VCD B 20 series - AMCA
Type: Square and Rectangular
Model: VCD-GB-21B
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.
Data
Damper Performance Ratings
-
Operating Pressure – 6”w.g (1500Pa.) Max.
Leakage – Class-I (Refer AMCA 500-D-12)
Velocity – 2000fpm (10.1m/s).
Standard Construction
Frame
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.
Blade
6” (152 mm) wide, 1.2 mm (18 gauge) thick galvanized steel 3V type roll formed.
Bushes
Nylon.
Mechanical Linkage
Galvanized steel link ages concealed with in the frame.
Axles
12mm square galvanized steel.
Quadrant
Heavy gauge galvanized steel with position indications
Shut,1/4,1/2,3/4,Open.
Gasket
Neoprene/Foam/Silicone Rubber Gasket*
JambSeal
0.3mm thick Stainless spring steel
Optional Fittings
Gear Wheel
Gear wheel sare of heat resistant Nylon placed with in the
frame instead of mechanical linkage for rattle free smooth
operation, operated with PVC knob/Quadrant.
Bushes
Brass/Bronze*/StainlessSteel.
Axles
12mm diameter galvanized steel.
Transitions
Neck adapt or for round duct connections.
Alphabet indicates the type of blade operation
A-Parallel Blade
B-Opposed Blade
C-Gear Opposed Blade
Optional Construction
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)
:Aluminium
Note:
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.
