Crankcase Ventilation
Product groups

Crankcase Ventilation

During the operation of combustion engines, so-called blowby gases are produced in the crankcase. They are made up of oil mist, exhaust gases, unburned fuel and water, are harmful to the environment and can damage the engine if they enter the engine compartment unfiltered.

We offer you a wide range of active oil mist separators that ensure highly efficient cleaning and active blowby conveyance during Crankcase Ventilation and return the separated oil to the oil pan. The reduction of oil ingress into the engine's intake system enables a higher boost pressure level, which can be used to increase engine performance and efficiency.

Our active systems achieve separation efficiencies of up to 99 percent, are scalable for any Passenger cars application and clean blowby volumes of 100 to 1,000 liters per minute reliably and effectively. For commercial vehicles as well as agricultural and construction machinery, we also offer high-performance fiber separators: the blowby gases flow through a fiber medium, whereby the oil particles remain attached to the fibers and are filtrated. Hengst fibre separators are also suitable as a simple retrofit solution and ensure that oil consumption is minimized and emission values are reduced.

Your benefits:
  • Higher engine performance and efficiency

  • Longer service life of the intake system

  • Reduced emission values

Please feel free to contact us:

Hengst SE
Nienkamp 55-85
48147 Münster
© 2024 Hengst SE

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purifying our planet

Our corporate vision

We make the planet cleaner with our products. We also make the journey there as clean as possible.


We develop the filtration solutions of the future. For our customers and for society.


Our focus is on energy efficiency. This helps the environment and saves costs.