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SP15/25 Spin-On

The SP15/25 series are economical, low pressure filters with spin-on convenience and a wide range of cleanliness and pressure ratings. 


  • Fluid Conditioning Systems
  • In-Plant Systems
  • Mobile Equipment
  • Power Transmissions
  • Process Systems


  • Economical
  • Spin-on convenience
  • Wide range of cleanliness ratings


  • Mix and match system of in stock heads and filters
  • Max. working pressure: 10.3 bar / 150 psi
  • Rated static burst to: 25.9 bar / 375 psi
  • Flow range to: 114 lpm / 30 gpm
  • Porting size options:
    • 1/2 in., 3/4 in. NPT
    • SAE-8 or SAE-12 O-ring 
  • Available Bypass Ratings:
    • 1.7 bar / 25 psi
    • 0.97 bar/ 15 psi
    • 0.34 bar / 5 psi
    • No bypass

Available Media Types

  • Donaldson exclusive Synteq™ – synthetic fiber media for greater filtration efficiency and higher dust-holding capacity
  • Natural fiber cellulose
  • Stainless steel wire-mesh
  • Water absorbing media
  • Many different efficiency grades from which to choose
The following are recommended practices for hydraulic filter servicing and handling. These steps are universal to many hydraulic systems. This servicing information is provided as a best practices guide. Donaldson recommends that you follow the filter service instructions supplied by your original equipment manufacturer. These recommended practices are not intended to replace or supersede the service instructions supplied by your equipment or vehicle manufacturer.
  1. Check the filter service indicator
    Check to see that the OEM specified service interval has been reached or that the service indicator shows that the filter is due for servicing.

  2. Turn system off and release pressure
    Ensure that the hydraulic system is turned off.
    Check that there is no pressure present.

  3. Unscrew and remove the old filter and gasket
    Properly dispose of the used filter according to local regulations.
  4. Wipe the filter head with a clean cloth

  5. Inspect the new filter for damage
    Check the new filter you will be installing for any shipping and handling damage. Do not install a damaged filter.

  6. Lubricate threads

  7. Apply a thin film of motor oil to the gasket

  8. Align threads – spin filter until gasket contact
    Fit the housing to the filter head as instructed on the housing.

  9. Follow the icons on the filter to tighten
    Do not over-tighten.

  10. Bleed the system and check for leaks

Donaldson Hydraulic Filtration Overview

Donaldson provides filters and contamination control products to protect hydraulic components -- in the factory and on heavy-duty equipment.

Donaldson Hydraulic Filter Servicing

Donaldson provides best practices and recommended steps for hydraulic filter servicing.