Cartridges with EPDM Seals


Sun is pleased to announce the release of cartridges configured with EPDM seals for use with phosphate ester fluids. EPDM seals, or Ethylene Propylene Diene Monomer, provide compatibility with type 4 and 5 fluids, with trade names such as Skydrol®, Fyrquel®, HyJet™ and Pyrogard™ 53 and offer high stability over wide temperature ranges.

Cartridges fitted with EPDM seals are the right choice for harsh application segments including:

  • Aircraft component testing and ground support equipment
  • Forestry equipment
  • Automotive brake components test systems
  • Mining - above and below ground machines
  • Military - auxiliary ground support equipment
  • Marine - Deck cranes, deck lifts, steering and stabilizing systems
  • Applications requiring higher-temperature, fire-resistant hydraulic fluids
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Features and Benefits of EPDM seals:

  • Allows previously excluded market segments to utilize Sun's premium cartridge valve technology, renowned reliable service, and flexible delivery options.
  • Operating temperature range of -70°F to 250°F (-60°C to 120°C)
  • Have no limited shelf life
  • Are purple in color for easy stock and field identification

Application Notes and Cautions:

  • Cartridges with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals. EPDM seals are also not recommended in food applications with exposure to aromatic hydrocarbons.
  • To protect the seal integrity, cartridges will be individually packaged at the factory in sealed plastic bags and will not be installed in assemblies.
  • Womack Machine Supply can install and ship assemblies upon customer request.
  • Manifolds and standard Sun packages equipped with either Buna-N or Viton seals are not compatible with phosphate ester fluids and therefore can not be used with cartridges fitted with EPDM seals.

New models are being added regularly. If the model you're looking for currently does not show the EPDM seal choice, please inquire here on its availability.

For more information about any of the products Womack sells please contact Womack Sales.

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