For control and balancing of supply and extract air systems. All dampers are fitted with opposed blade action, airfoil blades as standard.

The angles of the blades are adjusted via the robust, hand operated, lockable quadrant or with an optional extended spindle suitable for motorisation.

The linkage system is enclosed and positioned out of the airstream. Casing leakage conforms to HVCA specifications DW144 and Eurovent 2/2 classes A-C.


The casing is available fully flanged or with square/rectangular, circular or flat oval spigots and is manufactured from 1.2mm galvanised mild steel. Stainless steel casing is optional in grades 304, 316 or 430.

The blades are galvanised mild steel with the option of extruded aluminium airfoil section or stainless-steel grades 304, 316 or 430. An optional side seal gasket is available.


From 100 x 100 to 1000 x 1000 in one module.

Multiple assemblies can be supplied. 

Duct Dampers product image

Dampers range