The housing is made from anodized extruded aluminium profile with two galvanized angles in each corner to create a rigid, straight frame. The alu-zinc hood, with an attached collar, is tide glued on top of the filter. The damper and the aerosol / pressure drop checking inlet is placed in a special middle bridge and is adjustable from downstream. The fibreglass media, pleated in ‘Minipleat shape,’ is available in different heights of 47, 56, and 70mm. The filter cake is cast into the frame and middle bridge. This design produces high surface filtration and ensures the minimal pressure drop of the GTS model.
Version A of the damper system is a combination of an in-room adjustable damper with an aerosol inlet for efficient checking of the installed filter. This feature allows for easy adjustment of the airflow (filter velocity) during checking with a velocity meter from the clean room side. In addition, for DOP efficiency testing (of installed filters), an aerosol entry is provided to allow for easy channelling of the test aerosol to the upstream side of the filter media. Both are covered with a sealed screw to prevent any leaks.