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Guide Rings | Wear Rings

The guide ring or wear ring guides a hydraulic cylinder piston and rod and absorbs lateral forces. Metal to metal contact between the moving parts of the cylinder, for instance between the piston and the cylinder or the rod and the cylinder head. The advantages of these non-metallic guide rings (compared with traditional metal guide rings) are, among others, a high bearing load capacity, the elimination of local stress concentrations, wear resistance, a low coefficient of friction and low maintenance costs.

NewDealSeals supplies a wide range of guide rings as an economic alternative for e.g. Slydring® in HiMod®, Orkot® and Turcon® compounds.

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Advantages Guide Ring

  1. The tapes can be supplied either cut to length or by the meter, to be cut according to requirement.
  2. High load capacity (compressive strength), low wear and reduced friction due to an additive of carbon to the PTFE material.
  3. No tendency to stick-slip in the case of low sliding speed.
  4. Available in practical dimensions.
  5. Simple groove designs.
  6. Simple piston designs without metallic contact of the sliding surfaces.
  7. Profile geometry which is exactly suited to work in lubricated air as well as dry and oil-free air.

Technical Specifications

Working Temperature

-100 to +200°C

Surface speed

≤ 10,0 m/s

Permissible specific load q

At working temperature < 100°C:

2,5 N/mm2

Compounds Guide Ring

NDS-225, PTFE + 25% carbon

NDS-150, PTFE modified

Profiles Guide Rings

Profile G1

For pneumatic applications

G1 and G2 are used for bearings where it is imperative that the system pressure is carried on the seals. They are designed as open bearings with a well defined gap.

Profile G2

For hydraulic applications

G1 and G2 are used for bearings where it is imperative that the system pressure is carried on the seals. They are designed as open bearings with a well defined gap.

Profile G3

For hydraulic applications

G3 is a closed bearing, which in certain applications is used as a combined seal and bearing.

Guide Ring Materials

NDS® PTFE compound Characteristics Specifics Applications
NDS-100
PTFE virgin

Temperature range:

-190 to +230 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Most elastic PTFE type
  • Excellent chemical resistance
  • Excellent electrical insulating properties

O-rings, flat gaskets and light dynamic seals in food and chemical industry

NDS-123
PTFE +15% glass, +5% molybdenum disulfide

Temperature range:

-190 to +290 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Good dielectric properties
  • Increased creep resistance
  • Improved wear resistance

Piston seals, rod seals in medium duty dynamic applications, Valve seats

NDS-225
PTFE +25% carbon

Temperature range:

-190 to +315 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Good machinability, close tolerances and smooth surfaces possible
  • Excellent compression resistance
  • Good sliding and wear characteristics

Piston seals, rod seals, spring energized seals, bushings, wear guides.

NDS-235
PTFE +10% carbon fibre

Temperature range:

-260 to +310 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Good thermal conductivity
  • High wear resistance
  • Excellent sliding properties in water applications

Piston seals, rod seals, spring energized seals in water/fluid applications.

NDS-415
PTFE +15% graphite

Temperature range:

-190 to +230 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Excellent self lubricating properties
  • Low friction coëfficiënt

Piston seals, rod seals, spring energized seals for use against soft sealing surfaces.

NDS-640
PTFE +40% bronze

Temperature range:

-156 to +260 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Excellent creep resistance
  • Good thermal conductivity

Back-up rings and guiding strips. Rod and piston seals for heavy duty hydraulic applications.

NDS-660
PTFE +60% bronze

Temperature range:

-156 to +260 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Excellent creep resistance
  • Good thermal conductivity

Back-up rings and guiding strips. Rod and piston seals for heavy duty hydraulic applications.

NDS-750
PTFE + polyimide

Temperature range:

-260 to +310 °C

Chemical resistance:

Mechanical resist.:

Wear properties:

  • Low friction coëfficiënt
  • High wear resistance

Dynamic seals in (dry) running start-stop applications with a soft sealing surface.

Contact Us

We believe in the quality of our products and service. Fill out the form and one of our skilled engineers will contact you within the next business day.

Contact details

  • +31 (0) 226 362 233
  • info@newdealseals.com
  • Energiestraat 2-5, 1749 DN Warmenhuizen, Nederland