What is a DPF pressure pipe?
A DPF pressure pipe is a metal tube which connects the DPF unit to a DPF pressure sensor. This allows the sensors to accurately measure the inlet and outlet pressures of the DPF.
As the amount of particulate trapped by the DPF increases, the pressure at the inlet side of the DPF increases in comparison to the DPF outlet. This comparison is used by the sensor to calculate the amount of particulate trapped within the DPF. By measuring this pressure and the DPF temperature, the DPF software can determine if the DPF is becoming blocked and requires regeneration.
There are two variants of a pressure pipe – fixed (welded into and supplied with the DPF unit) and detachable (screw in and supplied separately).
What happens if they break?
Damaged or blocked pressure pipes can produce incorrect readings on the DPF pressure sensor, which could therefore lead to problems if undetected and unresolved. A faulty pressure pipe could be mistaken for a faulty DPF. This could cause wasted time and money if a new DPF is purchased as a result, and then still found to show incorrect pressure readings.
Why do they break?
Pressure pipes are very thin metal tubes, usually around 8mm in diameter. Through being ﬁtted to the underside of a vehicle, they are exposed to the elements, which means they are susceptible to damage. Due to their slim form, any impairment to the material can lead to further damage when the pipe is manhandled during removal.
We recommend new pipes should be fitted with a replacement DPF on all occasions. However, we also recognise that in some cases there is a need for DPF pressure pipes without requiring the DPF itself. This is why we have developed our range of high-quality pressure pipes.
When selling a DPF, it is recommended to also offer pressure pipes as supplementary products in case of damage to the existing ones. Our pressure pipes are products in their own right and can be sold on their own. It is worth noting that pressure pipes cannot be purchased without a DPF when buying as OE.
When selling pressure pipes, ensure they are linked to the DPF as associated/linked products. BM Catalysts pressure pipes are identified with the “PP” prefix, followed by the 5-digit reference number of the DPF that it fits (e.g. 11005 for a BM11005H), and ending in a suffix of either “A” or “B” – PP11005A.
The entire pressure pipe range at BM Catalysts is made from high-quality 304 grade stainless steel to ensure optimum durability.
Like all other BM Catalysts products, our DPF pressure pipe range can be found on MAM and TecDoc, both searchable via registration search or either product search.
More information on the BM Catalysts pressure pipe range can be found here.