Cleanable filter media
Test method for filtration characterization of cleanable filter media
ISO 11057 Sequence of the standard test phases
|
Measuring phases |
Conditions |
Determination of clean-gas concentration |
|
Phase 1: conditioning |
30 loading cycles with differential pressure controlled pulse-jet cleaning and a cleaning set point of 1 000 Pa |
yes |
|
Phase 2: ageing |
2 500 pulse-jet cleaning cycles at an interval of 20 s each |
no |
|
Phase 3: stabilizing |
10 loading cycles with differential pressure controlled pulse-jet cleaning |
no |
|
Phase 4: measuring |
30 loading cycles but at least 2 h measuring time with differential pressure controlled pulse-jet cleaning and a cleaning set point of 1 000 Pa |
yes |
|
Phase 5: optional measuring |
2 h loading cycles with raised cleaning set point of 1800 Pa |
yes |
Comaprision of testing parameters
|
Parameters |
Unit |
ISO 11057 |
VDI 3926 |
GB/T 6719 |
ASTM 6830 |
|
Dust concentration |
g/m3 |
5 |
18.4 |
||
|
Particle size (MMD) |
μm |
4.5 |
1.5 |
||
|
Filter face velocity |
m/min |
2 |
|||
|
Tank pressure |
M Pa |
0.5 |
|||
|
Conditioning (Cleaning set point / cycles) |
Pa |
1000 |
- |
||
|
Conditioning cycles |
|
30 |
|
||
|
Ageing (Puls-jet cleaning) |
cycles |
2500 |
10000 |
||
|
Valve opening time |
ms |
60 |
50 |
||
|
Ageing time (Each cycle) |
sec |
20 |
5 |
3 (5) |
|
|
Ageing time (Total) |
sec |
50000 |
30000 |
||
|
Stabilizing |
cycles |
10 |
10 |
10 |
30 |
|
Measuring |
|
30 loading cycles but at least 2 h |
30 cycles |
2/6 ( PM2.5 imapctor) |
|
 |
 |
