Diesel Oxidation Catalyst
Diesel and biodiesel engine exhaust gas contains many constituents that are
considered harmful to humans. Our high quality diesel catalytic converters
(diesel exhaust gas purifiers) are designed and specially formulated to remove
or reduce the harmful components while keeping pressure drop to a minimum. Our
standard units can provide over 90% reduction in carbon monoxide (CO) emissions,
plus high reduction levels of unburned hydrocarbons (UHC), aldehydes (the odor
causing component in diesel exhaust), as well as diesel particulate matter
(DPM). Higher reduction levels are possible depending upon engine operating
conditions and with custom configured units.
Our pre-engineered
converters are available in various sizes and configurations. Converter housings
are made of high grade 304 stainless steel. Inlet and outlet connections are
available with flanged connections, as well as straight tube and slotted tube
connections. The heart of the converter is our flow-through honeycomb substrate
that is coated with a high surface area, poison resistant washcoat and a high
activity, precious metal-based oxidation catalyst coating. While our standard
units are manufactured with a stainless steel honeycomb substrate, we also offer
ceramic honeycomb as an alternative.
The correct converter (purifier)
size will vary depending upon many factors including engine size, exhaust
temperature, allowable pressure drop, required emissions reductions and engine
duty cycle. The table below notes some of our standard, single layer, units;
however, custom designs are available upon request. All data is illustrative and
subject to change without notice.
MOBILE EQUIPMENT & SMALL FLOW UNITS | |||||
Catalyst, Model | Engine, Displ., Cubic In. | Engine, Displ., Liters | Unit, Connection, Inches | Unit, Length, Inches | Unit, Dia., Inches |
DOC-W-3-1 | < 150 | < 2.5 | 2 | 9 | 3 |
DOC-W-4-1 | 150-250 | 2.5-4.1 | 2, 2.5, 3 | 11 | 4 |
DOC-W-5-1 | 250-400 | 4.1-6.5 | 3, 3.5, 4 | 11 | 5 |
DOC-W-6-1 | 400-600 | 6.5-9.8 | 3, 3.5, 4 | 13 | 6 |
DOC-W-7-1 | 600-800 | 9.8-13.1 | 3, 3.5, 4 | 14.5 | 7 |
DOC-W-8.5-1 | 800-1200 | 13.1-19.7 | 4, 5, 6 | 15 | 8.5 |
DOC-W-10-1 | 1200-1600 | 19.7-26.2 | 4, 5, 6 | 18 | 10 |
DOC-W-11.5-1 | 1600-2000 | 26.2-32.8 | 5, 6 | 19 | 11.5 |
DOC-W-14.5-1 | 2000-3100 | 32.8-50.8 | 5, 6 | 24 | 14.5 |
MOBILE EQUIPMENT & SMALL FLOW UNITS
Catalyst, Model
DOC-W-3-1
DOC-W-4-1
DOC-W-5-1
DOC-W-6-1
DOC-W-7-1
DOC-W-8.5-1
DOC-W-10-1
DOC-W-11.5-1
DOC-W-14.5-1
Engine, Displ., Cubic In.
< 150
150-250
250-400
400-600
600-800
800-1200
1200-1600
1600-2000
2000-3100
Engine, Displ., Liters
< 2.5
2.5-4.1
4.1-6.5
6.5-9.8
9.8-13.1
13.1-19.7
19.7-26.2
26.2-32.8
32.8-50.8
Unit, Connection, Inches
2
2, 2.5, 3
3, 3.5, 4
3, 3.5, 4
3, 3.5, 4
4, 5, 6
4, 5, 6
5, 6
5, 6
Unit, Length, Inches
9
11
11
13
14.5
15
18
19
24
Unit, Dia., Inches
3
4
5
6
7
8.5
10
11.5
14.5
Notes:
- Fully welded design with straight pipe inlet & outlet connections
- Other inlet & outlet connections available
- Sizing based on nominal 4 cycle, naturally aspirated engine at 2,100 RPM
- All dimensions subject to change without notice
- Custom sizes available
STATIONARY DIESELS & MEDIUM FLOW UNITS | |||||
Catalyst Model |
Exhaust Flow M3/Min |
Exhaust Flow FT3/Min |
Unit Connection Inches |
Unit Length Inches |
Unit Dia. Inches |
DOC-F-20-1 | 140 | 4,950 | 8, 10 | 47 | 20 |
DOC-F-24-1 | 200 | 7,060 | 10, 12 | 51 | 24 |
DOC-F-28-1 | 260 | 9,200 | 10, 12 | 56 | 28 |
DOC-F-30-1 | 300 | 10,600 | 10, 12 | 59 | 30 |
DOC-F-32-1 | 340 | 12,000 | 12, 14 | 59 | 32 |
DOC-F-34-1 | 415 | 14,650 | 12, 14 | 64 | 34 |
STATIONARY DIESELS & MEDIUM FLOW UNITS
Catalyst
Model
DOC-F-20-1
DOC-F-24-1
DOC-F-28-1
DOC-F-30-1
DOC-F-32-1
DOC-F-34-1
Exhaust
Flow
M3/Min
140
200
260
300
340
415
Exhaust
Flow
FT3/Min
4,950
7,060
9,200
10,600
12,000
14,650
Unit
Connection
Inches
8, 10
10, 12
10, 12
10, 12
12, 14
12, 14
Unit,
Length,
Inches
47
51
56
59
59
64
Unit,
Dia.,
Inches
20
24
28
30
32
34
Notes:
- Removable catalyst element design with flanged inlet & outlet connections
- Suitable for single or dual catalyst layers
- Other inlet & outlet connections available
- Sizing based on nominal 770 deg. F exhaust temperature
- All dimensions subject to change without notice
- Custom sizes available
High Performance, Long Life Design Features
- Solid 304 SS construction
- Low pressure drop with metal honeycomb catalyst
- High resistance to mechanical shock due to rough handling and engine vibration
- High resistance to thermal shock during startup, shutdown and engine cycling
- Highest catalytic activity for reductions in CO, UHC's, soot odors
- Suitable for a wide range of diesel fuels and dual fuel applications

Medium Flow Unit Design Features
- Solid 304 SS construction
- Flanged inlet outlet connections
- Removable catalyst layers for easy cleaning or replacement
- Suitable for single or dual catalyst layers
- Inlet and outlet ports for instrument connections
- Removable lid design for easy catalyst access