CDH-K and CDH-B intake louvers
CDH-K intake louvers are dampers used for supplying makeup air in smoke and heat propagation control systems. CDH-B intake vents are louvres used in general ventilation systems.
CDH-K and CDH-B intake louvers are equipped with movable lamellas. CDH-B units are positioned manually or by means of an electric actuator. CDH-K units are positioned by means of an electric actuator.
The lamellas are made of anodised aluminium profiles and an insert mounted between profiles and secured with a glazing gasket. In the S version the lamella insert is made of a 20 mm thick multi polycarbonate sheets colour – clear). In the A version the lamella insert is made of 20 mm thick mineral wool with glass fleece inside and aluminium sheet outside.
The intake vent frame is made of aluminium and powder coated in the RAL9006 matt colour.
The lamellas of CDH-B intake louver can be controlled manually or by means of an electric actuator. Manual control – in this version the lamellas are positioned by means of a lever, which is blocked in the desired position. Electrical control – in this version the lamellas of CDH-K and CDH-B intake louvers are being controlled by means of an electric actuator of Belimo, open/close type, with a return spring, 24 V AC/DC or 230 V AC
When a fire-rated actuator with a return spring is used, in the case of an actuator power supply loss, the intake louver lamellas are opened.
More information in CDH data files.