Donaldson Fuel Filters Donaldson Diesel Fuel Filters Are Uniquely Designed To Protect Injectors And Pumps And Keep Engines And Heavy-Duty Equipment Running Smoothly. Today€Š¬˜s Diesel Engines Need To Maintain High Performance Levels To Remain Compliant With Stringent Emissions Regulations. Fuel Filtration Plays A Key Role, With Current High Pressure Common Rail Fuel Injectors Operating At Pressures Up To 2,000 - 3,100 Bar / 30,000 - 45,000 Psi. Clean Fuel Helps Minimize Expensive Repairs And Unplanned Downtime. Donaldson Offer Fuel Filtration Products To Protect Your Fuel Systems Including Injectors, Pumps And Engines. We Offer A Complete Line Of Fuel Filters For Popular On And Off-Road Applications. Spin-Ons And Cartridges Are Available In A Wide Range Of Filter Medias.