SAND TRAP LOUVRES AND WEATHER ELIMINAORS
Robertson Thermovent sand trap and weather eliminator louvres have been specifically designed to allow air flow into buildings and at the same time repel the entry of dust, sand and bad weather where these elements are natural hazards. Manufactured from Versacor, the units are designed and tested to withstand the most arduous conditions over many years. Installed vertically in buildings, these units provide a unique feature visually but perform an important element in ventilation design.


Application
Vertical channel louvres are sites assembled units manufactured from robertson protected metal and are designed for fitting into openings in masonry or mounting into vertical cladding. They are designed for two main applications:

•  for separation of sand from inlet air, for both natural and mechanical air inlet systems.
•  for severe exposed sites where high resistance to weather penetration is required for air inlet.

Installation
Fixing is quick and easy due to the low number of components and non-requirement for special tools. Site installation is simple. The inner louvre blades are screwed to the horizontal rails, the blade spacers rivetted in position, and the outer blades and flashings fixed.

Performance
Blade design has been fully tested to produce optimum spanning, pressure loss and separation characteristics and are certified by independent test certificates. Typical efficiency based on simulated desert sand dust (1 to 89 micron) is 85%.

Blades
Versacor protected metal 0.7 mm thick, maximum inner blade length 3.0 m. Other material specifications are available. Embossed coloured finish in standard versacor range.

Frame and flashings
Versacor protected metal 0.7 mm thick. Other material specifications are available.

Birdguards and Insect screens
Birdguards are available as an optional extra in galvanised steel, pvc coated galvanised steel or aluminium, or to suit customer's requirements. Insect screens are available as an optional extra in expanded aluminium small mesh type M901A (to BS 1470:1987) or stainless steel wire mesh. Note: birdguards/insect mesh will reduce the louvre free area.

Sizes
The sand trap louvre is available in the following dimensions:

•  any height up to a maximum of 3.0 m.
•  Width = 240 mm x no. of outer louvre blades + 2 x 150 mm.
•  Opening sizes. Add 20 mm to louvre width dimension.

Head, cill and jamb flashings can be supplied, when required, to suit individual requirements and match external cladding or louvre material. Weight 25 kg/m2.