Ruskin Fire and Smoke Damper

To prevent the harmful effects of the spreading of fire and smoke, fire dampers must be installed into the openings in the walls and slabs created to allow the installation of the air handling system.

Ruskin Fire Dampers, of the interlocking blade type, are the latest innovation in the control of fire and smoke.

Complying to the test requirements of Australian Standard AS 1682 the Ruskin Fire Damper obtained a 4 hour fire rating and met the leakage requirements for smoke control.

A and B are nominal damper sizes which are actual duct internal dimensions. D is duct diameter. The actual outside damper size is 5mm smaller than these dimensions. W is wall thickness.

Test and Approvals

Ruskin Fire Dampers have been tested at the extensive facilities of the Experimental Building station at North Ryde, NSW, Australia. Here a fire damper assembly designed to seal a vertical opening nominally 2400 x 2400mm was tested. Additional tests have been conducted at BHP Research Laboratories Melbourne. Designed for horizontal opening nominally 3045 x 760mm qualified for a 4 hour rating for fire resistance in terms of Australian Standard 1530 - Part4 1997 - Fire Resistance Test in Structures AS1682.

Single module dampers are provided up to 1200 x 1200mm for vertical mounting and up to 1015 x 750mm for horizontal mounting. Multi module dampers would be provided to vertical mounting in the size range 1200 x 1200mm to 2400 x 2400mm and vertical mounting up to 3045 x 760mm.

Size larger than the maximum tested sizes or with features contravening the test codes, are not available.

Construction

The components of the standard Ruskin Fire Damper are fabricated from Galva bond steel.

The damper casing is roll formed to give continuous internal flanges, spaced apart to allow the damper blades to travel freely.

The damper blades are held in the open position by a stainless steel link strap incorporating a fusible link, fusing at 71°C. The blades of horizontally mounted dampers are closed by constant force , coil band springs.

The complete damper casing assembly is then placed into a mounting frame and riveted in position.

The mounting frame is fitted with 2 sets of flanges to facilitate mounting of the frame into the wall or slab. These flanges are held with coach bolts.

Ruskin Fire Damper is identified by an attracted label giving model, type, rating, release temperature and approval to AS1682.