Back Pressure Valve Daf XF II Euro 6

The back pressure valve (Back Pressure Valve, BPV) with OE code 2128867 is an electric butterfly valve installed in the exhaust line of DAF Euro 6 vehicles with PACCAR MX-13/MX-11 engines. The assembly integrates the butterfly body and an electronic actuator with position sensor. Control is via CAN and it cooperates with the variable geometry turbocharger (VTG) and EGR in the engine air management.

Technical specifications

• Type: exhaust butterfly (BPV) with integrated electric actuator and position sensor.
• Actuator cooling: engine coolant circuit.
• Control: electronic, closed-loop control via ECU.
• Positioning: exhaust line, upstream of the aftertreatment (DOC/DPF/SCR) in Euro 6 layouts.
• Integration: with VTG and EGR to manage exhaust flows and temperatures.

DIPA can intervene to overhaul these spare parts thanks to its experience and expertise.

Functionality

• Control of exhaust back pressure. It modulates the butterfly opening to increase or reduce back pressure in the exhaust manifold. Back pressure is used to optimize combustion, EGR management and gas temperatures.
• Support for the engine brake. During deceleration, partial closing of the valve increases exhaust resistance, contributing to engine braking power. It works in combination with other systems (e.g. PACCAR integrated engine brake, valve timing management, VTG where present).
• Support for DPF regeneration. During particulate filter regeneration, the BPV is commanded to raise exhaust gas temperatures by increasing back pressure and promoting the thermal conditions needed for particulate combustion in the DPF.
• Protection of the turbocharger and the boost system. It helps keep exhaust and boost pressures within safe limits, avoiding thermal and mechanical overloads on the turbocharger. Under fault conditions it can be partially closed/opened to protect sensitive components.
• Optimization of emissions and fuel consumption. Correct BPV operation helps maintain stable NOx, particulate and fuel consumption parameters: back pressure, EGR, SCR temperature and exhaust gas management.

Model applications

• DAF XF

Typical faults and causes

• Loss of power, sluggish acceleration
• Jerking or irregularities on acceleration and deceleration
• Increased fuel consumption
• Black smoke from the exhaust, particularly under acceleration

Final conclusions

The DAF BPV 2128867 is a key component for thermal and emissions management of DAF MX Euro 6 engines. Actuator failures or seized butterfly movement compromise DPF regenerations, braking response and the reliability of the aftertreatment system.

DIPA offers a wide range of spare parts dedicated to the Truck sector, construction vehicles and industrial equipment. In addition, it supplies remanufactured components with performance equal to new, allowing cost savings on replacements and contributing to environmental protection through the circular economy. If the part you need is not available, no problem: DIPA can remanufacture your unit "on demand", restoring full functionality and safety in a short time.