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®.
Advantages Rotary Seal
- Minimal break-out and dynamic slide friction. Therefore no stick-slip. Steady movement is guaranteed even at low velocities
- Low wear
- High extrusion resistance
- High temperature resistance
- Compatibility with nearly all media due to the high chemical resistance of the rod sealing ring, and a wide selection of O-ring compounds
- 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: |
|
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: |
|
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: |
|
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: |
|
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: |
|
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: |
|
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: |
|
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: |
|
Dynamic seals in (dry) running start-stop applications with a soft sealing surface. |
Related PTFE Seals
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.
Guide Rings | Wear Rings
Wiper Seals | Scraper Seals
Wiper seals function to prevent dust, dirt, grains of sand and metal dwarf from penetrating into axially moving rods and plungers.
Wiper Seals | Scraper Seals
Spring Energized Seals
The Synering® system is an advanced sealing concept designed to meet extreme demands regarding temperature, medium, etc. which cannot be covered by conventional sealing compounds.
Spring Energized Seals
+31 (0) 226 362 233
info@newdealseals.com
Energiestraat 2-5,
1749 DN Warmenhuizen,
Nederland