Haldex Concentric
 
Varivent

Alfdex offers high-efficiency removal of oil droplets and soot particles from the ventilation gas in diesel engine crankcases, also known as blow-by or crankcase gases

 
The latest generation Alfdex separator is up to four times more efficient than the existing model, and/or can handle up to three times as much blow-by gas
   
The system uses centrifugal technology to eliminate particles down to 0.1 gram/hour or below at normal driving conditions to achieve optimal functioning of a closed crankcase ventilation system
   
At a separator speed of 7 000-8000 rpm, oil and soot particles are removed from the gas by forces of around 2 500 G’s and returned to the oil sump
   
Alfdex is now available with an electric brushless motor that has significantly lower energy consumption combined with a cleaning efficiency adapted to the actual need, as well as providing on-board diagnostics through a controller-area-network (CAN-bus)
   
Designed to meet new and tougher engine legislation that takes into account not only exhaust pipe discharges but also crankcase gases