Shutters, grilles, duct components wall and roof terminations
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Shutters, g r i l l e s , duct components w a l l and roof terminations Helios has a long tradition and experience in designing and manufacturing accessories to complete the fan range. This motivated Helios approximately 40 years ago to develop the world’s first polymer shutter range which was protected with patents in major industrial nations. Attractive in design to suit today’s architectural requirements, the latest technique combined with practical installation are characteristic advantages of Helios’s – Shutters – Louvres – Grilles – Rain repellent grilles – Valves – Wall and roof terminations. New in the range are the constant air flow controllers VKH. The ideal and cost effective solution to ensure a constant air flow in ducting sections as well as on air intakes and exhausts. 245

246 Shutters Special characteristics Made from non-corrosive, long life, weather and ultra-violet stable polymers - colour light grey (VK 160 in white). Withstands most aggressive atmospheres. External building cladding stays clean longer because air flow is channeled straight away from the shutter. Easy and quick installation. Flat compact design. Attractive appearance. Pressure drop When selecting a fan the pressure drop of all components of the system like ducting and shutters must be considered. The table shows the resistance to the air velocity through the air shutter. Model ranges Air...

247 Small and rectangular shutters Special orders Special orders The shutter ranges – air stream operated – manually operated – electrically operated are available in project specific special sizes. The dimensions can be varied within steps of 50 mm. Any portrait, landscape or square dimension is available. The shutters are manufactured to order and are non returnable. Therefore the dimensions must be defined accurately. To increase overall strength, an additional vertical centre mullion is fitted over 400 mm louvre length and a horizontal centre mullion over 1000 mm louvre length. Large...

248 Backdraught shutters RSK Backdraught shutter RSK Air stream operated shutter for installation in-line with circular ducting. Avoids unwanted air exchange (extract of warm air or intake of cold outside air) when the fan is switched off. Can be installed on intake or extract in any position through spring blades. If installed horizontally the shutter spindle should be vertical. If installed vertically it only operates with rising air flow. To cover further requests and severe conditions use RVS or RVM. Pressure drop RSK Äp Pa velocity in m/s Type Ref. Dimensions in mm Weight No. D L S kg...

249 External weather louvres Made from polymers and anodised aluminium Rain repellent grille RAG To cover intake and extract openings in walls, made from polymers. Attractive corrosion and weather resistant finish to prevent rain and snow from entering the system. Frame and louvres made from impact resistant and UV stable light-grey polymer. Mesh guard made from galvanised steel and coated with polymer. Designed to avoid unwanted access to the system. Mesh size 8 mm. Simple installation, fixing with screws and masonary plugs included. With adapter F.. (accessory see product page 252) also...

250 Air grilles Adjustable and fixed LGR Rectangular grilles LGR Rectangular with adjustable louvres. To cover rectangular intake or extract openings especially for rectangular ducting. Centrally adjustable louvres allow adjustment of air flow volume. Corrosion resistant design made from galvanised steel in a white epoxy finish. Includes mounting frame allowing universal installation. When installing in thin walled ducts fixing with 4 screws. Type Ref. Fits nominal duct No. openings mm LGR 250/150 0927 228 x 128 LGR 450/150 0928 428 x 128 LGR 350/230 0929 328 x 208 LGR 450/230 0930 428 x...

251 Fixed grilles Model range Model range Model range Model range LGM 80 131 105 16 75 LGM 100 155 127 16 95 LGM 125 195 150 25 120 LGM 160 252 190 25 155 Metal intake/extract grille LGM With pitched louvres to cover circular openings of ø 80, 100, 125 and 160 mm. High quality and attractivly designed cover. Pitched louvres obscure view into ducting when installed. Made from corrosion-resistant die-cast aluminium, white powder coated. Simple installation in ducting using rear spigot with fixing springs and sealing tape. LGM Type Dimensions in mm A B C D Type Ref. Weight No. in gramme LGM 80...

252 Duct components Ventilation ducts and accessories Flexible ducting for universal use in the most industrial, commercial and domestic applications. Examples include cooker hoods, tumble dryers etc. Y-pieces Practical junction for quick duct installation. Star partitioner with three spigots for ducting diameters 80, 100 and 125 mm. Reducers made from galvanised steel or polymers.* AS 100 Ref. No. 5224 Spigot plate square plate with circular 100 mm spigot made from polymers. To connect ducting on level surfaces. Worm drive clips A steel band with a snap on tension lock. Supplied in...

253 Roof outlets and wall kits Roof outlet Wall kit DDF Ref. No. see table Universal roof outlet For air inlet or extract. Suitable for connection to ducting from ø 125 – 400 mm. A large leaded sheet allows adaption to all tile profiles. Also suitable for flat roofs. All remaining parts made from galvanised steel. Cowl finished in tile red paint. DDF SDH Ref. No. 1476 Pitched roof outlet Universal design suitable for most tile profiles. A leaded sheet on the lower edge ensures a good seal to roof. Mounting plate and cowl made from galvanised steel. Flexible polymer tube with stepped spigot...

254 Constant air flow volume controller VKH for in-line installation Assembly Intake Extract VKH Inner casing Air flow element Flap with guiding cylinder Outside cylinder Textile sealing strip Model range – Dimensions in mm Air flow range Type Nom. duct ø ø D L m³/h VKH 80/.. 80 76 90 15 – 45 VKH 100/.. 100 96 90 15 – 90 VKH 125/.. 125 120 90 15 – 120 VKH 160/.. 160 155 120 120 – 300 VKH 200/.. 200 195 120 210 – 500 The guiding cylinder is responsible for the movement of the flap and controls therefore the relation between pressure and air flow volume to give the design volume flow....