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The Eaton breather filters of the NBF Series "breathe" air in and out as the oil level rises and falls. The filters prevent the penetration of contamination from the ambient air in the hydraulic fluid. This circulating air contains articles and moisture that can cause corrosion, increase equipment wear, and reduce fluid performance.

Filter Type
Flow Rate
120-925 gpm (450-3,500 l/min)
Thread connection


  • Refillable with drying agent
  • Available with adapter and clogging indicator
  • Replacement spin-on air filter available separately
  • Seal and plastic plug prevent moisture entering before installation


  • Hydraulic systems
  • Bearing lubrication systems
  • Mobile earthmoving equipment
  • Gearboxes
  • Robotic hydraulic systems
  • Mobile tank systems
  • Diesel fuel storage tanks
  • Transformers with oil cooling systems
  • Vacuum and welding chambers
  • Agricultural equipment
Questions before you buy