ActivCRT® and ActivDPF® diesel particulate filters

The Johnson Matthey ActivDPF® automatically regenerating DPF system ensures that your emergency genset is always ready to generate clean power.


The ActivDPF system integrates the patented CRT® system with a load bank for reliable filter regeneration, even where there is insufficient load for passive regeneration.

The ActivDPF system delivers the most cost-effective performance in the industry: 


ActivDPF system 

 Other systems 


Integrated load bank increases engine load 

Filter heated by electrical resistance 

Regeneration mechanism 

Soot reacts with NO2 at lower temperature 

Combustion of soot with O2 at higher temperature 

Energy consumption 

Regeneration requires less energy 

Regeneration requires more energy 

Regeneration frequency 

Only when needed 


Conversion of CO, HC 

ActivDPF converts CO, HC 

No conversion 

Prevent wet stacking to ensure reliable power generation 



Value engineering 

Single load bank shared between multiple gensets 

Regeneration technology required on every single genset 

Cost of ownership 

(capital and operating) 



SootAlert Monitor is standard on all ActivDPF and SCRT systems:

•    Remote monitoring of single or multiple gensets 

•    Easy access to historical data

•    Remote data retrieval through internet/network connection

General enquiries

EU and Asia applications

North America applications