Diesel Catalysts: Sizes and Designs
Direct-Fit Catalytic Mufflers
Nett Technologies has direct-fit catalytic mufflers available for hundreds of models of construction equipment, forklift trucks and other diesel powered equipment. The pre-designed models are in-stock or can be built and shipped within a few days. Catalytic mufflers are available to replace the original muffler for any diesel application. The M-Series or D-Series emission control catalyst is built into the muffler and is selected based on the size of the engine. Catalytic mufflers are guaranteed to be a exact-fit replacement for the original muffler. The emissions reduction performance of catalytic mufflers is also guaranteed, provided the engine is well maintained without excessive lube oil consuption.
Universal-Fit Catalytic Converters
Nett® Technologies offers two universal-fit configurations for both the M-Series and D-Series catalytic purifiers, as shown in Figures 1 and 2. The welded (one-piece) design is more compact and recommended for space-limited applications. The clamped design allows for easy removal of the center-body (catalyst) for inspection and cleaning, if required.
Figure 1. Welded Design |
Figure 2. Clamped Design |
M-Series Diesel Oxidation Catalyst: Typical dimensions of Nett® M-Series catalytic purifiers are listed in Table 2.
| Model | MD15 | MD25 | MD35 | MD55 | MD65 | MD85 | MD125 | MD155 | MD215 | MD295 | MD385 | MD665 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A, mm inches |
175 6.9 |
198 7.8 |
213 8.4 |
236 9.3 |
250 9.8 |
260 10.2 |
274 10.8 |
312 12.3 |
447 17.6 |
447 17.6 |
495 19.5 |
635 25.0 |
| B, mm inches |
- | - | 221 8.7 |
244 9.6 |
- | 267 10.5 |
282 11.1 |
320 12.6 |
454 17.9 |
454 17.9 |
504 19.8 |
642 25.3 |
| C, mm inches |
- | - | 119 4.7 |
142 5.60 |
- | 168 6.6 |
196 7.7 |
218 8.6 |
218 8.6 |
218 8.6 |
218 8.6 |
218 8.6 |
| D, mm inches |
66 2.6 |
79 3.1 |
91 3.6 |
112 4.4 |
130 5.1 |
142 5.6 |
168 6.6 |
193 7.6 |
226 8.9 |
264 10.4 |
302 11.9 |
398 15.7 |
| E (ID) | As per customer specifications | |||||||||||
D-Series Catalyst: Dimensions of Nett® D-Series diesel catalytic purifiers are listed in Table 3.
| Model | DL 42 | DL 62 | DL 102 | DL 152 | DH 222 | DH 312 | DH 422 | DH 522 |
|---|---|---|---|---|---|---|---|---|
| A, mm inches |
267 10.5 |
280 11.0 |
325 12.8 |
325 12.8 |
356 14.0 |
406 16.0 |
498 19.6 |
518 20.4 |
| B, mm inches |
- | 290 11.4 |
335 13.2 |
335 13.2 |
382 15.0 |
432 17.0 |
513 20.2 |
533 21.0 |
| C, mm inches |
- | 142 5.6 |
168 6.6 |
185 7.3 |
218 8.6 |
218 8.6 |
218 8.6 |
218 8.6 |
| D, mm inches |
86 3.4 |
102 4.0 |
127 5.0 |
152 6.0 |
203 8.0 |
203 8.0 |
254 10.0 |
282 11.1 |
| E (ID) | As per customer specifications | |||||||
OEM Products
OEM applications are developed in co-operation with the equipment manufacturer. The catalyst specifications are optimized to meet the particular emission targets and durability requirements. As well, the design of the catalytic converter, including the catalyst substrate selection, canning technology, and noise attenuation requirements are optimized for the application. Development of OEM exhaust systems includes the design and fabrication of prototypes which are tested for emission and noise performance. Nett also provides compliance certification with the EPA or California ARB (Air Resources Board) regardless of whether a Nett emission control device is utilized. Three emission test cells are available for exhaust analysis of LPG, gasoline, CNG or diesel engines up to 250 kW (335 hp). See Engine Emissions Test Laboratory section for more information.