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Fire / Smoke Dampers & VCD's

Heavy Duty Volume Control Dampers

Heavy Duty Volume Control Dampers

The HD Series Multi-Leaf Volume Control Damper has been specifically designed for installation in systems where high air pressures and velocities are experienced.
Combined with a robust construction, the damper is suitable for use on air handling units.
Dampers for air control can be manufactured with a single drive to a maximum size of 2500mm wide x 2000mm High. where low closed blade leakage is required, the max. size with a single drive is 1000mm x 1000mm.
Manual Quadrant Control, Motor Option or 19mm dia. Extended Spindle for actuation by others are available as standard.


• Standard case construction is galvanised mild steel
• Three airfoil blade designs
• Four casing options
• Low and high pressure models
• Out of airflow linkage
• Easy conversion from manual to motorised or vice versa
• Can be supplied with blades and case in 316 or 430 stainless steel
• Balance and control dampers
• Infinite sizing capability
• Variable flange dimensions and casing widths
• Comprehensive control options
• Stainless steel side seals to order


Specifications & Tests
• Unless stated otherwise, flange models suitable for class A & B of DW144, spigot models suitable for class A B & C
• Conforms to HVCA specification DW144
• Conforms to Eurovent 2/2 classes A - C
• Independent performance tests for pressure drop, leakage and airtightness. Test reports 158 and 160 refer


Blade Details

Plain Air Balance Blade with End Caps

Twin Edge Seal Blade


Precision Rolled Blade

The 100mm wide galvanised blade is offered as standard with the option of extruded aluminium airfoil section or precision rolled grade 430 or 316 stainless steel available to order. All blades are fitted to 19mm diameter spindles.
All models are available with either opposed or parallel blades (opposed as standard).
End Caps are fitted to the ends of aluminium blades to alleviate noise generation.