key filter - for wind turbine applications


The CJC® Key Filter is an offline oil filtration solution, used for maintenance of oils for hydraulics and lubrication in wind applications, with improved performance even in highly aerated oils. The CJC® Key Filter is ideal for installation on gearboxes, hydraulic pitch systems and main bearings. CJC® Key Filter is a depth filter and is vital for removal of particles, varnish and moisture. 


  • Fast and safe filter insert change - 5 minutes
  • Improved capacity - up to 40%
  • Prepared for sensor technology
  • Reduced O&M costs
  • Ideal for highly aerated oil
  • Increased equipment reliability & uptime
  • Increased component and oil lifetime
  • Reduced maintenance costs
  • Reduced breakdowns
  • Less waste oil - reduced carbon footprint

The offline filter pump draws oil from the lowest point on the gearbox or system reservoir and returns the clean & dry oil to the reservoir after being cleaned in the depth filter media of the CJC® Key Filter insert, KFi. The CJC® Key Filter offers fast draining, easy opening and a simple design philosophy and there are no loose parts to be lost. The material requires no surface treatment, and has a very high corrosion resistance. The filter also has an integrated backpressure and in combination with the internal continuous air bleed, no venting is required after start-up. The filter has a superior dirt capacity and improved efficiency. All functions have a positive effect on the equipment lifetime and on O&M costs.

The CJC® Key Filter insert (KFi) consist of several discs bonded together, based on a new special design with a unique pattern. 
The material is made of 100% natural cellulose fibers from sustainable resources.

Only one oil filter is as natural as the energy you produce
CLICK to learn why... 

Product Sheets

Key Filter CJC, Offline Oil Filtration for Wind Applications
Key Filter insert, KFI, CJC_PSFI3034-UK

Brochures & Guides