The KleenAir partial flow filter is a flow through diesel particulate filter providing effective removal of diesel particulate matter with lower back pressure than conventional wall flow systems. It is ideal for retrofit on most diesel engines including light duty cycle and even two-stroke designs.

• Up to 60% reduction in particulate matter
• Greater then 80% reduction in CO and HC
• Easy Installation
• Maintenance free
• Fail safe—Does not block
• Improved sound attenuation
• LEZ approved

The KleenAir partial flow filter uses a network of flow-through channels, consisting of corrugated metal foils and metal fibre fleece. These channels have a variable cross section through their length to transfer the exhaust gas through the catalysed, stainless steel filter layer. Particles (PM10) are collected on the surface of these fibres and oxidised. The catalytic coating provides a high particulate reduction across a wide range of exhaust flows and temperatures, whilst retaining similar back pressure characteristics to a conventional diesel oxidation catalyst. The design of this unit is also very effective in the reduction of carbon monoxide (CO), diesel hydrocarbons (HC) and diesel odour. The unit is London LEZ approved, taking Euro 2 vehicles to Euro 3 standard for particulates. It is also suitable for off-road applications, taking Stage 1 and 2 engines to Stage 3a standards.

The KleenAir PFF can operate with diesel fuels containing up-to 500ppm sulphur. For best operation we recommend a content less than 15ppm (ULSD).