PTFE Seals

CDK Seals specialise in the manufacture & supply of PTFE seals.

PTFE Seals are the preferred choice for many applications. They are also a great replacement for more traditional oil seals.

PTFE is a tough polymer with very good working temperatures and high surface speeds that can be blended with the most suited filler for specific uses. This ensures a much longer life with reduced need for maintenance, replacement or repair.

PTFE has a memory and will always return to its original form. The plastic memory effect needs time to take place before use to allow the PTFE Seal to expand so it perfectly matches the shaft diameter before use. This is completed with the use of specialist tools which can be supplied by CDK

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Uses for PTFE Seals

Our PTFE Seals have been used for the following applications;

  • Motors – PTFE shaft seals are perfectly suited to motors

  • Gearboxes – PTFE rotary seals are perfectly suited to applications with very high-speed surfaces

  • Blowers – With high wear and pressure resistance PTFE shaft seals are ideal for use in blowers

  • Mixers – PTFE seals meet the requirements of the food industry with food grade materials available

  • Spindles – PTFE valve seals work well in spindles thanks to the minimal or zero leak qualities of PTFE

  • Compressors – PTFE seals help to ensure optimal performance of screw compressors

and many more applications.

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Industries which Utilise PTFE Seals

PTFE Seals are so widely utilised in so many industries because of the many benefits the material possesses, not least the fact that it is so chemically resistant making it perfect for use in extreme temperatures, in contact with water, food products and much more.

  • Aerospace

  • Agriculture

  • Construction

  • Food and Drink

  • Hydraulics

  • Medical and Laboratories

  • Mining

  • Pharmaceutics

  • Rail

  • Transportation

Many Advantages of Choosing PTFE Seals

There are many benefits to choosing PTFE Seals over other elastomeric seals.

  • Flexible Material

  • Chemical resistant (including acids, oils & bases)

  • Thermal resistant

  • Nonstick

  • Electrically resistant

  • Dry running

  • Low friction

  • High abrasion resistant

PTFE Seals – Improving Performance in Hydraulic Applications

Hydraulic applications are challenging for seals.

Not only must the hydraulic seals prevent leakage of fluid from the cylinder, but hydraulic seals must also withstand high pressures, extreme temperatures and transverse forces within the cylinder.

In such applications, the function of Hydraulic Seals goes far beyond preventing fluid leakage.

Performance and Durability

Hydraulic systems are sealed using a combination of specialised seals.

Rod seals prevent leakage of fluid from within the cylinder to the outside while hydraulic piston seals prevent fluid from flowing across the cylinder head.

This allows pressure build up on one side of the piston, making the Cylinder extend or retract. Wear rings guide the piston and piston rod within the hydraulic cylinder, absorbing transverse forces, preventing metal-to-metal contact. Scrapers or Wipers scrape dirt, foreign particles, chips or moisture from the piston rods as they retract into the cylinder, preventing contamination.

Hydraulic systems are usually sealed with a complex configuration of high performance seals. Our Hydraulic Seal products range includes O-Rings and a number of innovative Seals designed for applications in hydraulic cylinders, such as the spring-energized and O-Ring energized Seals.

CDK offers a wide range of seals that provide the ultimate in leakage control. Our proprietary seal designs meet users’ requirements for low friction, compact form and simple installation.

Our seals are usually manufactured in PTFE material specially engineered for fluid power applications, these compounds include Blended Polytetrafluoroethylene (PTFE) seals, Ultra-high-molecular-weight polyethylene (UHMWPE) and many more,which provide exceptional resistance to wear and outstanding extrusion properties.

Compatible with virtually all media, they demonstrate unrivalled performance at extremes of temperature.

cdk seals products - o rings and box kits
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Installation Guide

It is always best practice for an expert to install, replace or remove PTFE Seals. Installation is the most vulnerable time for PTFE as a material as it is the that it is at most risk of damage.

Follow our useful guide to help guarantee best results;

  1. Always protect the PTFE Seal from any dust, oil or other contaminates.
  2. Keep the PTFE Seal dry.
  3. Check for any sharp edges. If you discover sharp or damaged edges, don’t use.
  4. Avoid any damage. Don’t use the seal if it is at all damaged as this will affect its integrity and compromise its sealing potential.
  5. Keep the plastic protective layer on the PTFE Seal throughout installation. This is a brilliant installation aid.
  6. It may on some occasions be beneficial to heat the PTFE Seal ring to soften the material for ease of installation by immersing them in boiling water. For smaller applications, this is not usually necessary and is best avoided.
  7. Apply even pressure when installing for correct alignment.
  8. Use the correct installation tools for fitting and resizing the PTFE

These key tips are for general installation and do not cover more specific installation requirements.

For more specific advice and guidance, feel free to contact our team of experts.

CDK Seals - Products - PTFE Seals

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Please contact us to discuss your sealing requirements.

Our experienced team is waiting to help!

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