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Volume, Fire & Smoke Dampers

HD-VCD

Heavy Duty VCD's

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.

Features

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 Detail

leafPlain Air Balance Blade with End Caps (left)



Twin Edge Seal Blade (centre)leaf




Precision Rolled Blade (bottom)leaf


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.