Cooling lubricant preparation at high pressure


Initial Situation

The MAHLE GmbH in Rottweil is a manufacturer of pistons for commercial vehicles and automobiles. The centralized cooling lubricant treatment for 40 machine tools should be automated. The cooling lubricant which is used for production of truck pistons requires a fine filtration under high pressure sphere. The pre-filtration is proceeded with the help of a modified FAUDI filtration plant from the company Mayfran. In doing so, the cooling lubricant has to be free from steel particles.


The cooling lubricant consists of 8% oil. In addition to that, the self-contained supply of band filter should be completely replaced by the new centralized cooling lubricant treatment system. Downstream to the FAUDI band filter plant there is an AF 179 that ensures a filtration rate from < 40 μm. Thanks to the omission of process interruptions and the significantly longer maintenance intervals, the new system works highly cost-efficient.

Technical Data

  • Flow rate: 9.000 l/min
  • Operating pressure: 3 – 5 bar
  • Viscosity: 2 mm²/s
  • Temperature: 20 – 40°C


The application combines four automatic backflush filter of the type AF 179 S for the fine filtration of low viscosity fluids. The fine filtration is set behind the gravity separator. The facility is a self-cleaning system with durable filter elements made from metal in highest Filtration Group-Quality. The pulse-cleaning of the automatic filter is done without interruption of the filter- and production process.

Customer Value

Our product offers highest compatibility with existing systems and flexible integration into the production process, no waste of filter material due to the self-cleaning functionality of the automatic filter and a long durability of the automatic filter elements (more than 4 years) by using premium materials. Further advantages are an increased filter life and reduced maintenance intervals over the lifecycle of the whole production plant and an increased filtration rate.

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