Fast action roller doors, also known as ‘speed doors’, facilitate easy and rapid access to and from environmentally-controlled buildings or rooms whilst minimising temperature changes compared with slower acting doors. They are ideally suited to application such as avoiding heat loss in a warehouse or distribution centres to protecting the refrigerated rooms and the sensitive environments required in the pharmaceutical industry.
For internal use where air pressure differentiation is low, the most common solution is a PVC curtain above the door frame. For external use where the doors are subject to wind load a vertical stacking mechanism is recommended as this offers Standard Class 1 wind resistance.
Since prevention of heat loss is an important reason for specifying such doors, the PVC canvas insulation value and minimising of air leakage around the edge are important. The canvas used on the DLS (Door Loading Services ) and DLS (Door Loading Services ) ranges of fast action roller doors has a density of 950 g/m² and offer the low heat transfer c oefficient (thermal admittance) of 0.045 W/m² ºC (for comparison purposes this is approximately two-thirds the insulating properties of standard double glazing which is rather impressive). Leakage around the sides is minimized by close-fitting nylon brushes. The operational temperature range is important especially when protecting refrigerated premises the standard range is -30 to +70 ºC.
High speed doors can be fitted in conjunction with sectional overhead doors to provide an excellent combination of security, protection and ease of access.
Each door is custom-designed to each application. These are the most common customisations that can be specified
Where wind load resistance is immaterial or minimal then the aperture may be up to 25m² in area with the maximum horizontal or vertical dimension being 5000mm. This is reduced to 4000mm where Standard Class 0 or 1 wind load resistance is required.
Each vertical rolling door is available in 13 RAL colours for the PVC with matching power coating for metal work. Each is specified to M2 self-extinguishing fire resistance.
Transparent vision panels can be fitted to allow daylight through the door or when sight through the door is required for safety and security reasons. Doors may additionally be painted with signage or logo graphics.