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PURItech - Model DPFN -Self-Cleaning Standard System
This filter system developed byPURItechfor on-road applications, features a unique technology, which works with a self-cleaning regeneration during operation. The passive self-cleaning filter system is the ideal filter for vehicles that operate in medium and full load duty cycle. Trucks in long distance traffic are getting retrofitted with the DPFN system.
- Permanent self-cleaning at 225C (average)
- 24 hours operating cycle without stop
- Monitoring system and system check
- Installation kit for almost all engines available
- The DPFN system is a self-cleaning filter system with passive regeneration on a catalyzed basis
- Filter and catalyst is one unit
- The system consists of ceramic monolith
- The DPFN system is designed for applications with exhaust gas temperatures from 225C and can also be used on diesel engines with medium loads
- Filter system for low backpressure, due to controlled filter regeneration
- Electronic system monitoring and data logging of operation per central unit
- Application: 70% long-distance operation, 30% full-load operation
- Type of Regeneration: Passive regeneration
- Regeneration Temperature: Exhaust gas temperatures from 250C
- Regeneration Time: Permanent self-cleaning during operation
- Emission Reduction:
- Particle: -99%
- Carbon oxide (CO) -95%
- Hydro Carbons (HC) – 99%
- Filter Medium: Filter monolith, Aluminum Oxide (Corderit)
- Approvals: TRGS-554 / TUEV / KBA / AUVA / VERT / CARB et al.
- Warranty: 1 Year
- Maintenance: Filter monitoring: 500 hours / filter cleaning 1000 hours
The DPFN system consists of ceramic monolith, sheathed with a stainless steel can and internal insulated with an elastic mat against vibrations.
The filtration is achieved by a wall-flow method where the channels are plugged on one end and particles are remaining in the wall while the gas flows through the walls. A huge number of channels result in a big filter surface with a high storage capacity for soot particle.
The regeneration process of the DPFN system converts soot into carbon dioxide (CO2) and water. A residue of burned oil (ash) remains in the filter.
- Monolithic filter block made of Aluminum Oxide
- Honeycomb with reciprocally closed channels
- Channel wall with porous structure
- Exhaust gas flows through channel wall and gets filtered
- Surface of the channels are catalyzed
Heavy Long Distance Traffic
- National and/or international long distance traffic with heavy load
Exhaust gas temperature of the vehicle
High
- 250 C medium exhaust gas temperature AND
- 250 C exhaust gas temp.
- 40% duty cycle AND
- 300 C exhaust gas temp.
- 30% duty cycle AND
- 350 C exhaust gas temp.
- 10% duty cycle
The DPFN system doesn’t work on applications / city transportation, distribution or vehicles with low or medium load, as well with construction applications.