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Particulate filters BPF

BPF Particulate Filters



• Over 99% reduction in particulates

• For use on industrial off-road vehicles

• High exhaust gas temperature required

• Passive regeneration

• Available with off-board regeneration

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BYBOX M12 - CONTROL BPF

Bersy

Bersy’s experience has led to the creation of BYBOX M12, a datalogger control unit suitable for all types of particulate filters.

BPF R 427 - FILTER WITH ADDITIVE

Bersy

The BPF R427 system is constructed using passive regeneration silicon carbide (SiC) filters where the regeneration is facilitated by a concentrated liquid catalyst (commonly called FBC - Fuel Borne Catalyst) that is mixed into the fuel. This system allows regeneration from temperatures as low as 340 - 350°C. The BPF R427 filter is approved according to the Swiss VERT off-road procedure and is included in the VERT FILTER LIST.

BPF R 187 - FILTER REGENERATION WITH OFFBOARD

Bersy

The BPF R187 system is constructed using silicon carbide (SiC) filters. The product is particularly simple and extremely effective, guaranteeing over 97% particulate filtration. The regeneration of the R187 filter is facilitated by an external electric regeneration unit.

New

BPF R 620 - FILTER WITH PRE-CAT

Bersy

The system BPF R620 is realized with the use of filters made of silicon carbide (SiC) associated with oxidation catalyst, placed in front of the filter to ensure the reduction of emissions of unburned hydrocarbons (HC) and carbon monoxide (CO). This combination allows to increase the value of nitrogen dioxide (NO2) that, unlike oxygen (O2), allows for the burning of the particulates at temperatures compatible with those present in the exhaust gas.

New

BPF R 360 - CATALYZED FILTER

Bersy

The system BPF R360 is realized with the use of filters made of silicon carbide (SiC) in which the catalytic activity oxidant is delegated to the deposition of noble material directly on the filter substrate to ensure also the reduction of emissions of unburned hydrocarbons (HC) and carbon monoxide (CO). This combination allows to increase the value of nitrogen dioxide (NO2) that, unlike oxygen (O2) allows for the burning of the particulates at temperatures compatible with those present in the exhaust gas.

BPF

particulate filter

The function of a diesel PARTICULATE FILTER
A diesel particulate filter (DPF) is used with diesel and biodiesel internal combustion engines in order to reduce particulate matter from the exhaust gases. They are manufactured from porous ceramic substrates which trap the particles in the exhaust flow. DPFs are capable of reducing particulate mass by over 97%. This percentage is a requisite of the VERT certification. VERT is the Swiss association which includes the primary DPF manufacturers.

Characteristics and operating principles of diesel PARTICULATE FILTERS
Bersy manufactures the BPF filters using silicon carbide as this is the optimal material in terms of thermal resistance, mechanical resistance and filtration efficiency.
Bersy can also supply, on request, cordierite filters; Cordierite is a ceramic porous material which is lighter but more delicate as compared to silicon carbide.
The ceramic substrate is manufactured as an extruded honeycomb structure and the channels are blocked at alternate ends, as shown in the image below. The exhaust gases are forced to flow through the walls between the channels, which are able to retain very fine unburnt carbon particles.

The particulate matter trapped inside the filter channels must be burnt in order to allow the exhaust gases to flow correctly through the wall of the filter. Particulate combustion (regeneration) happens under normal conditions at a temperature of 650 °C, which is not achievable in the exhaust gases of a diesel engine. Therefore it is necessary to lower the onset temperature with catalytic activity (passive regeneration) or increase the exhaust gas temperature with the introduction of external energy (active regeneration).

During regeneration not only does the temperature inside the filter increase, but the backpressure decreases.

Regeneration, however, is not capable of completely removing all the solid particles and it cannot remove engine oil ashes. These ashes are trapped in the filter and to remove these further cleaning is required every 1000-1200 hours (depending on engine condition, maintenance, fuel quality, engine oil quality and other parameters). This cleaning consists of cooking the filter at high temperature and pulsing air through the channels to remove the ash; this procedure must be performed with special machines in order to preserve filtration efficiency and regeneration performances.

It is recommended to read each DPF product sheet carefully and to consult with Bersy in order to specify the correct system for your application.


Bersy considers many factors when specifying diesel particulate filters, including the specific application, exhaust gas temperatures and the regeneration technology available.