Damper, Louver, VAV, Sound Attneuator

Betec Cad Tunnel Ventilation Dampers 

Type : Tunnel Ventilation Fire Damper

Fire Rating : 4 hours as per BS 476

Blade : Aerofoil Type

Construction : Galvanized Steel (GI)

BETEC CAD’s Ventilation Dampers are designed to isolate sections of a 

ventilation system with very high level of sealing. The dampers are mounted 

in side of the tunnel or at tunnel ends to control the pressurized air, air intake 

and smoke exhaust in long tunnels without intermediate supplies.

In emergency situations , for fire and smoke control, the dampers 

pressurize the tunnel for safe egress of train, automobile, passengers 

to escape and creates a negative pressure in the area of the fire to 

remove smoke and gases.

BETEC CAD’s Tunnel Ventilation Dampers are heavy duty and robust 

dampers requiring less maintenance and are suitable for high humidity, 

high pressure, dust laden environments making them ideal for installation 

and operation in Tunnels, Oil & Gas, Marine and Nuclear applications.