Home Shape Created with Sketch. PTFE Seals Shape Created with Sketch. Rotary Seals

Rotary Seals

Rotary seals are used in applications with oscillating or rotating movements in order to retain liquid lubricants and to prevent the penetration of dirt and water. These seals help to extend the service life of parts and to enhance the long-term performance.

Producers of rotary transmissions prefer simplified seal designs. This can be achieved by means of internally sealing rotary sealing set profile Y1. They consist of wear resistant glide rings of low friction and of NBR or FKM O-rings as energizer. The rotary sealing set profile Y1 is suitable mainly for applications where the pressure alternates from one side of the seal to the other, such as pivots for rotating track rings, swivel joints, hose reels, and in machine tool hydraulics. If the sealing set is used as an end seal, it is recommended to install a wiper ring at the end of the components.

NewDealSeals supplies a wide range of rotary seals as an economic alternative to for instance Roto Glyd Ring® and Rotomatic®.

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Advantages Rotary 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

Extra info

Please apply this seal only in combination with closed guiding elements.
Standard compounds and range

Technical Specifications

Movement type

Rotary

Working pressure

≤ 300 bar

Working temperature

standard:

-30 to +108°C

with FKM O-ring:

-25 to +204°C

Surface speed:

≤ 1,0 m/s

Standard sealing ring compounds

NDS-225, PTFE + 25% carbon

Standard materials O-ring

NBR, FKM, FFKM

Profiles Rotary Seals

Profile Y1

Considering the special working conditions, the rotary sealing set profile Y1 is equipped with one or two circumferential lubricating grooves.

Rotary 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.

Related PTFE Seals

Back-up Rings

Back-up rings are used for static and dynamic applications in connection with O-rings, to prevent extrusion of the O-ring into the diametrical clearance.

Back-up Rings

Piston Seals

The Piston Seal consists of a single-acting PTFE piston sealing ring and an O-ring. They are combined as a single unit and are appropriate for single- acting pistons in hydraulic cylinders.

Piston Seals

Rod Seals

The Rod Seal consists of a single-acting PTFE rod sealing ring and an O-ring. They are combined as a single unit and are appropriate for rods and plungers in hydraulic cylinders.

Rod Seals

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Contact details

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