HT Terminal Filters
The HT terminal high efficiency filter is designed and tested to extract the smallest particles out of the air. Each HT housing filter contains a ‘Minipleat-Mediapack’ available in different heights with a new application technology of the ‘Hot Melt Spacers’ to achieve the lowest pressure drop results.
The changing of the filter is done from the inside of the room. An option that makes the maintenance faster, easier, and therefore cost efficient.
The filter frame is made from anodized extruded aluminium 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 housing. 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,’ is available in three different heights (47, 56 and 70 mm) and is cast into the filter frame and middle bridge. This design gives a highly active filter surface and ensures the minimal pressure drop of the HT model.
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 testing.
XY – Scan Testing Device:
The 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 at nominal airflow.
Version A of our damper system is a combination of an in-room adjustable damper with an aerosol inlet for checking the efficiency on the installed filter. This gives the opportunity to change the airflow (filter velocity) very easily 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.
Version B of our damper system gives a functional possibility for a simple, low cost adjustment 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.
- HEPA efficiencies of 95% up to 99.9995% (@ 0.3µm )
- High quality micro fibreglass paper
- Lowest initial pressure drop
- Adjustable airflow by means of a damper
- Two different damper designs
- Anodized rigid aluminum frame
- High quality standard due to Quality Assurance System
- HEPA filter tested by laser particle counting system
- Highly economical although high final pressure drop
- For use in clean rooms up to class 1
- EN 1822-5
- EN 779
- ASHRAE 52.1
- ISO 9001:2000