Titus FFDE - Testing

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IOM - FFDE
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Testing
Recommend ed Testing – 8 readings with a Velgrid
Each fan filter unit is thoroughly tested at the factory before shipment.
However, because of the “rigors” of shipping, Titus encourages units are
re-tested after installation.
Titus recommends that the customer contact an independent organization,
with technicians trained and experienced in performance evaluation and
maintenance of clean air equipment.
HEPA filters (Type J) are tested to IEST-RP-00034. ULPA filters are tested to
(Type F) IEST-RP-00034. All filters are UL 900 recognized. Your filters may
have special requirements, please see original engineering specifications
for you specific project.
All units that are airflow tested at Titus are tested using a Shortridge
Airdata Multimeter 870 with a Velgrid head. The recommended method of
reading is to place one corner of the Velgrid head 1-1/4” from the corner of
the filter face and then take four reading evenly spaced along the four foot
side, then repeat these reads three additional times. This gives a total of 8
reading to test the unit. All advertised data is based on using the Velgrid
with 8 readings (128 velocity points). Titus recognized the using 8 reading
during a cleanroom start-up may be time consuming and recommends
using 4 Velgrid readings taken on each 2x2 filter section will approximate
the same as 8 readings.
Recommended Testing – 8 readings with a Velgrid
Additional independent testing on the Titus fan filter units show that using
one-2x4 or two-2x2 hoods simultaneously give airflow data (cfm) with 5
percent of a duct traverse using 10 diameters of straight duct upstream of
the fan intake.
Recommended Testing – 8 readings with a Velgrid