Retrofit technologies & products

Retrofitting devices have existed for almost two decades now, diesel particulate filter (DPF) technology being the dominant technology in retrofitting for some years. Today, however, the NOx emissions are the main concern. The annual threshold values set for nitrogen dioxides (NO2) (40 ?g/m3) in the EU directive on ambient air quality have been exceeded in many busy roadside areas in large cities over several years; therefore, actions to reduce NOx are now being implemented in many cities and countries.

For NOx reduction, SCR technology has been successfully used in OE applications, and the same technology has also proven to be efficient and reliable in retrofitting. SCR combined with DPF is the most efficient combination in the retrofitting market, significantly reducing both PM and NOx, and markedly improving air quality in the short term. 

Reduction technologies

Proventia provides retrofit systems based on diesel oxidation catalyst (DOC) technology, diesel particulate filter (DPF) technology, selective catalytic reduction technology (SCR) and combinations of these three technologies.

Targeted pollutant
Reduction technology
Proventia product
Emission reduction %
PM + NOx
Urban driving
>90 % NOx reduction
>90% PM reduction
PM + NOx DPF + SCR NOxBUSTER® DPF + SCR >90 % NOx reduction
>90% PM reduction
NOx SCR NOxBUSTER® SCR > 90% NOx reduction
PM DPF PROAIR® DPF > 90% PM reduction
CO and HC DOC PROCAT™ DOC >90% CO reduction
>90% HC reduction

Proven results

Proventia's proven results from global retrofit projects make us the leader in the market. We have supplied retrofit devices for a number of air quality projects worldwide including various mobile source applications e.g. mining and materials handling and construction machines, as well as on-road vehicles like trucks and buses. Our diesel retrofit technologies have proven their ability to significantly reduce unwanted emissions at a reasonable cost.