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Pall® UltiPleat® SRT Housings

Donaldson replacement cartridges for Pall® Ultipleat® SRT 219, 319 and 619 provide protection from particles and contaminants that reduce the effectiveness of lubricant and hydraulic fluid. Donaldson filters deliver long life and excellent system protection.


  • High-performance cartridge filters with advanced pleat pack design for applications that require high initial cleanliness and dirt holding capacity
  • Ideal for filtering synthetic fluids, water glycols, water/oil emulsions, petroleum-based and high water content fluids


  • Donaldson DT Synteq synthetic filter media has smooth, rounded fibers for low resistance to fluid flow
  • Resists charge generation and reduces the occurrence of electrostatic discharges induced by the flow of fluids through the filter media
  • Proven and reliable – protect systems from harmful ingressed contaminants


  • High-efficiency Donaldson Synteq™ glass fiber media grades with performance to ß<4(c)=1000 (per ISO 16889)
  • Double wire backed with an epoxy-coated steel mesh for excellent pleat support and spacing, allowing maximum media area and excellent protection for applications that have operating pressure surges
  • The inside to outside flow path also reduces the likelihood of cross-contamination during filter service
  • Consistent performance throughout filter life
  • Potted with epoxy-based adhesives
  • Viton® O-ring seals for compatibility with a wide range of fluid types


Pall® and Ultipleat® are registered trademarks of Pall Corporation. Viton® is a registered trademark of E. I. DuPont de Nemours and Company.
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. These steps are not intended to replace or supersede the service instructions supplied by your equipment or vehicle manufacturer. Donaldson recommends, where possible, to follow the filter service instructions supplied by your original equipment 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 the cartridge housing

  4. Remove the used filter and gasket, if applicable

  5. Clean out the housing seal area and cap
    Clean out any sediment from the inside of the filter housing
    Properly dispose of the cartridge according to local regulations

  6. Inspect the new filter cartridge for damage
    Check the new filter you will be installing for any shipping and handling damage

  7. Lubricate seals, gaskets and threads 
    Lubricate the o-rings, gaskets, housing seals and threads with clean system oil

  8. Install new cartridge
    Install filter into the housing

  9. Align threads – spin filter until gasket contacts
    Fit the housing to the filter head as instructions on the housing

  10. Hand tighten the filter
    Tighten per the guidance of the icons which appear on the filter housing
    Do not over-tighten

  11. 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.