Type : Tunnel Ventilation Smoke Damper
Leakage Rating : Class II as per UL555S
Blade : Aerofoil Type
Construction : Galvanized Steel (GI)
BETEC CAD’s Tunnel 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.
Leakage Rating : Class II @ 350° F as per UL 555S
Air Velocity : 3000 fpm (15.2 m/sec)
Pressure : 6″ water gauge (1.5 KPa)
Operational Rating : 250° C for 1 hours. (as per HKFSD)
Fatigue Cycles : 30 pressure reversal cycles @ 3Kpa
Max . Holding Pressure : 20” W.g (5Kpa)
Air Velocity : 4400 fpm @ ambient
Pressure : 12″ water gauge (3 KPa) @ ambient
Leakage Rating : Class I as per UL 555S
14 gauge (2 mm) thick galvanized steel sheet with 2″ (50mm) external flanges.
Aerofoil blades of 14 gauge (2 mm) thick roll formed galvanized steel.
300°C high temp, resistant Silicon rubber blade seals.
High temperature resistant concealed ball bearings.
¾” (19 mm) diameter.
Electric spring return type with inbuilt limit switches.
Pressure drop for Dampers