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Rod Seals

Rod seals are used in hydraulic applications to seal liquids inside cylinders. Rod seals are mounted externally. They seal the cylinder rod and prevent liquid from leaking out of the cylinder.

NewDealSeals supplies a wide range of hydraulic rod seals as an economic alternative to e.g. AQ Seal®, Bal Seal®, Double Delta®, Flexiseal®, Glyd Ring®, MSE® Seal, Omniseal®, Rimseal®, Stepseal®, VL Seal®, Variseal® and Wynseal®.

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Advantages Rod Seal

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

Technical Specifications

Movement type

Rotary, reciprocating

Working pressure

Standard:

≤ 400 bar (≤ 160 bar for profile R3)

In case of reduced extrusion gap (H7/f7) and large cross-sections:

≤ 600 bar

Working temperature

Standard:

-30 to +108° C

With FKM O-Ring

-25 to +204° C

Surface speed

≤ 4,0 m/s

Standard compounds Rod Seal

NDS-150, PTFE modified. NDS-660, PTFE + 60% bronze

Standard materials O-ring

NBR, FKM

Profiles Rod Seals

Profile R1

Single acting for hydraulic cylinders

Profile R1 is particularly suitable for rods in control cylinders, servo-assisted equipment, machine tools and quick acting cylinders. An optimal sealing performance is obtained if the sealing set is used in tandem with a double-wiper.

Advantage compared to R2 & R3:
Good back-transport of oil film due to special shape of sealing edge.

Profile R2

Double-acting for hydraulic cylinders

Profile R2 is particularly suitable for rods in control cylinders, servo-assisted equipment, machine tools, quick acting cylinders and in construction machinery.

Advantage compared to R1 & R3:
Capable of sealing dynamic pressure from both sides (bidirectional) at high pressure.

Profile R3

Double-acting for hydraulic cylinders

Profile R3 is appropriate for dynamic applications as an alternative to an O-ring, for situations where sealing performance and friction have to be optimised.

Advantage compared to R1 & R2:
Can be used in existing O-ring grooves.

Rod 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