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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 main concern is the NOx emissions. The annual threshold values set for nitrogen dioxides (NO2) (40 μg/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.
Proventia provides retrofit systems based on diesel oxidation catalyst (DOC) technology, diesel particulate filter (DPF) technology, selective catalytic reduction technology (SCR) and combinations of the these three technologies.
Emission reduction %
|PM + NOx
|DPF + SCR||
NOxBUSTER® City DPF + SCR
|>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
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.
Project Manager, Retrofit
jaakko [dot] kurikka [at] proventia [dot] com
Vice President, Sales & Marketing
petri [dot] saari [at] proventia [dot] com