NCA Series 900 - Standard Volume Control Dampers

General-purpose volume control and shut-off dampers intended for low/medium velocity applications. Utilizing the HVC standard out-of-airstream linkage, all gears are protected from dust and dirt by being positioned within the channel outer frame, making S900 dampers less susceptible to requiring frequent maintenance than rival units where the linkage is within the airstream. 

Series 900 dampers are multi-leaf, opposed blade dampers available in two configurations:

S900B: Standard volume control dampers, designed for balancing applications where a high level of shut-off is not required - Galvanized steel frame/case and extruded aluminium blades as standard. 

S900C: Shut-off dampers; fitted with additional seals, shut-off dampers have far lower leakage levels than standard VCDs - Galvanized steel frame and case, extruded aluminium blades with a silicone rubber tip seal. 

Features and benefits:

• Volume control dampers and low leakage shut-off dampers for general applications.
• Double skin aerofoil blades.
• Square, circular and flat oval connections for all types of ductwork.
• Galvanised steel and extruded aluminium construction.
• Full range of actuators.