Voloume Control Dampers
Instruction :
Louvers / flap are made of mild steel / galvanised
sheet. The louvers / flap are designed in the form, which can withstand high
temperature control in closed position to the flame path between air duct and fire
effected area.
The shape of the louvers / flap in somewhat complex in nature
for multi fold purpose.
(i) The complex shape reduces the leakage facto
considerably.
(ii) Five exposed surfaces are backed up
Positive sealing
linkage
Linkage provided with spring return devices for positive setup pressure on each
louvers / flap, enabling reduction in leakage factor.
Sealing System :
Complex shape are provided at mating surfaces are designed to creat a heavy pressure
drop during leakage, because the air / gas has to take two sharp angles turns. This
gives a low leakage factor during damper operation.
Sealing efficiency :
The ceiling of damper is 97% on cross sectional area.
Closing Reliability
: BKA Fire Dampers are designed to close automatically immediately (depends
on mode of actuation) on receive of signal of fire occurance.
Accessories
(Optional)
1. Position Transmitter
2. "Open" and / or "Close"
indication
3. Auxiliary Switches