Inspections and Testing DMW inspects and tests
the filter at every step of the cleaning process. When we are finished processing the DPF we know the exact condition
of the filter and have absolute confidence and knowledge of the level of recovery. Cleaning results are shared
with the customer and can be compared with historical recovery levels for the filter.
Cleaning Results DMW has an overall average
cleaning success of about 95% of the filters. A recovered filter reaches Green Tag or Orange Tag status as set
by FSX statistical analysis. Approximately 5% of the incoming filters will not move out of the Red Tag range for
a variety of reasons or have failed or been damaged prior to receipt. These filters are Red Tagged and deemed un-cleanable.
DMW Cleaning
Procedure:
1
Record owner and serial number
2
Inspected and test filter on TrapTester;
record defects, damage and test results in database
3
Perform Stage 1 pneumatic cleaning
of the filter using the TrapBlaster. Inspect filter during cleaning process using built in filter failure diagnostic
feature. Record defects.
4
Test filter on TrapTester. Compare
results with Baseline Matrix; determine status as Green Tag, Orange Tag, or Red Tag
5
If Green Tag achieved record results,
repackage and return to customer.
6
If status is Orange Tag or Red Tag
move filter forward into Stage 2 thermal cleaning using the TrapBurner
7
Perform second pneumatic cleaning on
TrapBlaster to blow out ash freed in Stage 2 thermal cleaning.
8
Test filter for air flow on TrapTester;
record results. Compare results with Baseline Matrix; determine status as Green Tag, Orange Tag or Red Tag and
attach tag with cleaning results
9
Record results in DMW's database, repackage
and return to customer.
CLEANING CHARACTERISTICS
Competitor
A
Competitor
B
DMW
Each filter cell is addressed individually
x
x
Cleans on both ends of filter
x
x
Diagnostic capability detects failed cells
x
x
Operator can see entire cleaning process
x
x
Automatic cleaning mode
x
x
Manual override of automatic mode for custom cleaning
x
Percentage of dust removed from filter
74%
71%
95%
CLEANS UNDER ENCROACHING INLET AND OUTLET FLANGES FITS
ALL MANUFACTURERS FILTERS WITHOUT CUSTOM ADAPTERS
DMW cannot and does
not guarantee or warrant that we can achieve recovery of the filter. Filters can fail for a variety of reasons
as a result of operating conditions. The primary source of failure is unusual thermal events that have caused sintering,
failure of the cell walls or melting of the ceramic sub-strait. Filters can also be damaged by dropping them, thermal
shocking them, excessive oil soaking, chips and vibration. Due to design and materials some filters last longer
than others or can with stand higher temperatures.
DMW Cleaning
Procedure:
