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Partial Oxidation Filters (POC) 
DET has a variety of devices that produce over 50% particulate matter filtration, but less than 85% of that of a DPF. DET’s Partial filters come in a variety of materials. The only commonality between them is that they produce more back pressure than a Diesel Oxidation Catalyst (DOC) and less than a Diesel Particulate Filter (DPF). Partial filter technology is popular for retrofit applications were high levels of Sulfur are used and were engine condition / age is not ideal.
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