HD Series - Circular Spigotfit, Galvanised Steel Blades, Hand Operated/ Extended Spindle

The HD series damper range offers blade profiles that provides air volume control through to low closed blade leakage characteristics, that have been designed for systems where high air pressures and velocities are involved.

With its robust construction the HD series damper makes it the ideal choice for use on air handing units and the aerodynamic blade profile encourages smooth airflow offering minimal pressure drop.

Side covers are fitted to the flanged case not only ensuring that the dampers meet Class C case leakage of DW144, but additionally safeguarding against hands and foreign objects being placed into the path of the moving linkage.

Damper control is via factory fitted 19mm diameter extended spindle control for actuation by others, manual quadrant, electric or pneumatic actuation. Dampers are supplied in flanged or spigot style casing compliant with DW144 as appropriate.

Flange dampers for air control are available with a single drive to a maximum 2380mm width for 50mm flanges and 2400mm width for 40mm flanges all with a maximum height of 2000mm and a standard 130mm deep case.

Dampers for low closed blade leakage applications (HD-LL), the damper width and height are limited to 1000mm to ensure continuity of performance with a single drive.

More sizes available, please get in touch for a quote.