Nett diesel particulate filters
S-Series Passive Diesel Particulate Filter
A passive, catalysed wall-flow filter that removes over 90% of diesel soot and eliminates visible smoke – listed by the US Mine Safety and Health Administration for underground mining.
- over 90%soot removed
- 5 – 10 kPatypical pressure drop
- 2,000 – 6,000 hmaintenance intervals
- 275 – 300 °Cneeded ¼ of the time
The range
Choosing the Filter Material
Filter Materials
| Cordierite | Silicon carbide | |
|---|---|---|
| Best for | Most heavy-duty engines with hot exhaust | Low-temperature duty with risk of uncontrolled regeneration |
| High-temperature durability | Good | Better – higher maximum temperature |
| Weight and cost | Lower | Higher |
How it works
How the S-Series Works
Wall-Flow Filtering
The filter is a honeycomb of square channels, each open at one end and plugged at the other. Exhaust has to pass through the porous walls; the soot can’t, so it’s trapped.
Burning the Soot Off
A noble-metal catalyst on the filter lowers the temperature soot burns at, so it oxidises during normal running. For about 25–30% of the time the exhaust must reach 275–300 °C; older, dirtier engines may need 325–400 °C. Use ultra-low-sulphur diesel wherever possible.
The catalyst also cuts carbon monoxide and hydrocarbons, like a diesel oxidation catalyst.
Why the S-Series
Built for Mining
MSHA Listed
Helps retrofit compliance with underground diesel particulate rules.
Compact
Insulated, stainless steel housing, custom fit available.
Monitored
Optional computerised controller with three alarms and data logging.
Long Intervals
Maintenance every 2,000 to 6,000 hours.
How to choose
Before You Fit a DPF
Check the Exhaust Temperature
The filter needs 275–300 °C for a quarter of its running time to clean itself – we can log it first.
Engine Condition
Dirty, high-emitting engines load the filter faster and run a higher pressure drop.
Fuel
Use ultra-low-sulphur diesel (under 15 ppm sulphur).
Literature & related
More Information
- Nett catalytic mufflers
How 3-way catalytic mufflers and A/F control work · PDF, 374 KB
Not Sure Which One You Need?
Tell us about the job – the machine, the conditions and what it has to do – and we’ll help you choose the right Nett Technologies product.