Exhaust Control Systems

Exhausting All Possibilities

Products for Retrofit or Integration Into New Equipment Design



Purifilter™ employs a silicon carbide substrate and precious metal catalyst coating – providing superior performance and durability compared to traditional DPFs. Under common operating conditions, Purifilters automatically oxidize accumulated particulates.



The CombiFilter™ is a non-catalyzed Diesel Particulate Filter that is actively regenerated.  On-board and off-board regeneration models are available to best suit the needs of the customers operation.  CombiFilter™ is also popular in mining operations.


Purifilter™ OR

Purifilter™ OR is a passively-regenerating diesel particulate filter (DPF) that is compatible with a wide variety of off-road engines. Purifilter™ OR uses the same silicon carbide filter media from our other field-proven Purifilter™ models and augments it with proprietary  Mixed Phase Catalyst (MPC®) technology, an upstream diesel  oxidation catalyst and highly-efficient thermal insulation.


Purifilter™ Plus M

Purifilter™ Plus combines the passive regeneration of Purifilter™ with  electrical heating elements that are used to periodically clean the  DPF – making it an outstanding choice for both urban and highway drive cycle applications.


AZ & DZ Purifier

The AZ & DZ family of Purifiers and Purimufflers are diesel oxidation catalysts (DOCs) that reduce carbon monoxide build-up. They also cut exhaust odor by reducing hydrocarbons and soluble organics of emitted particulates – decreasing particulate matter (PM) emissions, exhaust opacity and exposure to known diesel toxins.


Purifilter™ EGR

The Purifilter™ EGR leverages CDTi’s advanced MPC® precious metal catalyst technology on a diesel oxidation catalyst (DOC) upstream of an advanced base metal-coated DPF.  This combination provides low back pressure, reduced cleaning intervals, and more than 98%+ PM reduction.


Off-Road CatTrap™

A field proven passively regenerating Diesel Particulate Filter, commonly used in mining operations since 1990.  CatTrap™ features an advanced base metal soot ignition catalyst does not produce NO2 emissions while also reducing particulate by 98%+.

Field proven solutions

CDTi Products used as "First Fit" by global OEM Manufacturers

Particulate Filter

Oxidation Catalyst

selective catalytic reduction

Three Way

Applications and Industries

  • Diesel
  • Truck
  • Gasoline & Natural Gas Engines
  • Bus
  • Drayage
  • Refuse
  • Mining
  • Construction
  • Stationary
  • Marine
  • Material Handling
  • Power Generation

Verified Solutions

CDTi Products have been tested under the most stringent requirements to achieve government verification and ensure you will meet local regulations.

CARB Verified US EPA Mine Safety and Health Administration VERT

Please reach out to us for all of your emission reduction and compliance requirements.

CDTi North America
Dan Lyon
National Sales Manager

Phone: +1 805.205.1348
Mobile: +1 805.415.0100
Email: dlyon@cdti.com
California, USA

CDTi Europe
Lars Hergart
Managing Director, Sweden

Phone: +46 40 670 15 50
Mobile: +46 705 985434
Malmö, Sweden