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GT Terminal Filters
The GT terminal high efficiency filter is designed and tested to extract the smallest particles
out of the air. Each GT terminal filter contains a "Minipleat-Mediapack" available in different heights with a new application
technology of the "Hot Melt Spacers" to achive lowest pressure drop results.
Design:
The filter frame is made from anodized extruded aluminum profile with two angles
in each corner to get a rigid straight frame. The zinc coated hood with an attached collar is tie glued on top of the filter. At the damper, version A, the aerosol / pressure drop checking inlet is placed in a special middle bridge and is adjustable from downstream. The fibreglass media which is pleated in "Minipleat shape", available in three (3) different heights (47, 56 and 70 mm), is cast into the frame and middle bridge. This design gives a highly active filter surface and ensures the minimal pressure drop of
the GT model.
Testing
Each filter is tested and packed in accordance with American Standard IEST-RP-CC-001.3 (HEPA and ULPA Filters) or in accordance with the European standard EN 1822-1, 4&5 (Testing filter elements HEPA and ULPA efficiency and scan method) or customer requested testings.
XY - Scan Testing Device
FILT AIR XY-scan testing device is able to perform automated filter leak testing of high efficiency air filters using automatic particle counters and a motorized scan table. While the particle counter probe passes over the filter face, the computer compares the counted particles with the given leak tolerance setting. In addition it calculates the overall efficiency for each checked filter and measures the pressure drop @ nominal airflow.
Dampers
The version A of our damper system is a combination of inroom adjustable
damper with an aerosol inlet for efficiency checking on the installed filter. This
gives the opportunity to change the airflow (filter velocity) very easily during
checking with a velocity meter from the clean room side. Furthermore, for DOP efficiency
testing (of installed filters) there is an aerosol entry provided to easily bring
the test aerosol to the upstream side of the filter media. Both are covered with
a sealed screw to prevent any leaks.
The version B of our damper system gives a functional possibility
for a simple low cost adjusting of the entering air volume. This means that there
is a bridge attached to the collar that carries the damper on a thread pin. Furthermore,
a gasket buffer prevents movements caused by the airflow.
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