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Wiper Seals | Scraper Seals

The function of wiper seals is to prevent dust, dirt, grains of sand and metal dwarf from penetrating into axially moving rods and plungers. Thus the development of scratches is largely prevented, guiding elements are protected and the working life of seals is extended.

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Advantages Wiper Seal

  1. Small installation grooves.
  2. Minimal break-out and dynamic sliding friction. Therefore no stick-slip. Steady movement is guaranteed even at low velocities.
  3. Excellent sliding properties.
  4. High wear resistance, therefore long service life.
  5. High temperature resistance.
  6. Compatibility with nearly all media due to the high chemical resistance of the rod sealing ring, and a wide selection of O-ring compounds.
  7. Available in diameters up to 1500 mm.

Technical Specifications

Type of movement

Rotary, reciprocating

Surface speed

≤ 4,0 m/s

Working temperature

Standard:

-30 to +108°C

With FKM O-ring:

-25 to +204°C

Standard materials Wiper

NDS-660, PTFE + 60% bronze

Standard materials O-Ring

NBR, FKM

Profiles Wiper Seals

Profile W1

For double-acting

Profile W1 consists of a double-acting PTFE wiper ring and an O-ring as pretensioning element.
Capable of sealing dynamic pressure from both sides (bidirectional) at high pressure.

Profile W2

For single-acting

Profile W2 consists of a single-acting PTFE wiper ring and an O-ring as pretensioning element.
Economic price level.

Wiper Seal 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