Zero has undertaken successful fire testing on timber doors with the FLDL fusible link louvre in conjunction with an intumescent aperture liner. This intumescent has been specifically formulated for use with this louvre on timber fire doors and protects the door from burning through; it is not required on steel fire doors.

The AL134PSA liner is 44mm wide and has been included in a successful 30 minute fire test on a 44mm thick timber door, while AL218PSA is 54mm wide and has been included in a successful 60 minute fire test on a 54mm thick timber door, both to BS EN 1634-1: 2008. BM TRADA Report CHILT/RF13260 refers, copy of test report available on request.

The FLDL has been used on steel fire doors for many years, but it can now be used on timber fire doors. It is a self-attaching steel louvre (i.e. no holes need to be drilled in the door) with concealed fixings one side. In normal operation the blades can be opened and shut manually by means of a finger pull. In the event of fire, it has a fusible link which parts at 74⁰C and allows the stainless steel mechanism to snap the louvre blades shut, thus preventing the spread of flames. The standard finish is galvanised steel grey primed ready for powder coating but it is also available Grades 304 and 316 stainless steel. Expandable models are available to suit different door thicknesses.

Please contact us if you require any further information on these products.

Posted on 4th September 2014 at 12:00 am