Sealing integrity test
Fig. 9: Sealing integrity test
The casing is fitted with a sealing integrity test
facility. Sealing integrity is tested with a sealing
integrity test device (see operating manual).
1.
Connect the sealing integrity test device
(Fig. 9/3) to the connection point on the filter
(Fig. 9/2).
2.
Apply at least 2000 Pa to the test groove
(Fig. 9/1).
3.
Check the leakage rate on the flow rate
meter of the sealing integrity test device.
ð
The value must not exceed 0.003% of
the nominal volume flow rate.
If this value is exceeded, adjust the clamping
screws or the clamping frame; also check the seal,
test groove and filter element for damage. Then
repeat the sealing integrity test.
Differential pressure measurement
The initial differential pressure for TROX filters is
given on the label on the filter frame.
There are two ways to measure the differential
pressure:
Permanent measurement:
Continuous differential
pressure measurement and monitoring of the final
differential pressure. This is done with a static differ-
ential pressure measuring device (Fig. 10/1), e.g.
TROX MD-UT, MD-APC or MD-DPC, using the
pressure measurement points (Fig. 10/2) at the side
or on the top of the casing.
Fig. 10: TROX MD-DPC connection
Connecting a stationary measuring device
Plus (+)
- to the 'Plus' measurement point (+)
Minus (–) - to the 'Minus' measurement point (–)
Temporary measurement:
Temporary differential
pressure measurement with a mobile measurement
device connected to the internal measuring tube
(Fig. 10). For this, you have to remove the diffuser
face,
Ä
9
.
Connecting a mobile measuring device
Plus (+)
- to the internal measuring tube
(Fig. 8/1)
Minus (–) - Don't connect; the differential pressure
is measured against the room pres-
sure.
Re-attach the plugs (Fig. 10/3) after the measure-
ment.
Maintenance
TFM Particulate filter modules for ceilings
10