Volume Control Dampers
|Application||HVAC air duct systems|
are manufacturing with single flap / multi louvers. The louvers are connected through suitable linkage to a controlling actuating devices, such as electrical actuator / pneumatic actuator / solenoid valve / pneumatic cylinder / fusible link. Louvers / flap shaft are provided with bearing with greasing facility to enable smooth rotation. Louvers / flap are made of mild steel / galvanized 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.
- The complex shape reduces the leakage factor considerably.
- 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.
Complex shape are provided at mating surfaces are designed to create 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 the mode of actuation) on receiving of the signal of fire occurrence.Accessories (Optional)
- Position Transmitter
- "Open" and / or "Close" indication
- Auxiliary Switches