Diesel Fuel Filter

Diesel Fuel Filter

General information

Diesel Fuel Filter, or commonly known as DFF, filters dust and water from diesel fuel

Diesel engine components like pump or injector is getting more precise especially for Common Rail System.

These components are designed and manufactured in a couple of micrometers of tolerance to accurately work under extreme high pressure.

In such system, filtering dust and water in fuel is quite critical. Even small dust can lead to damage these components.


  • High filtration efficiency
  • High water separation efficiency *

*only for vehicle applications with water separator

Location of Diesel Fuel Filter

Location of DFF

Bad effects of dust and water in fuel

Bad effects of water and dust in fuel 1
Bad effects of water and dust in fuel 2