Rotary sealing set Prädifa series RS | Product Series

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Outside Diameter (mm)

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Maximum Working Temperature (C)

Seal Material

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Rotary sealing set Prädifa series RS Rotary sealing set Prädifa series RS

Rotary sealing set Prädifa series RS

Where to Buy

Rotary seal for rotary distributors. Dynamic function on inner diameter. Double-acting. For highest-pressure applications. ISO 7425.

Technical Specifications

  • Thermal Application Type: High Temperature (< 205°C), Low Temperature (< -35 C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
  • Maximum Operating Pressure: 500 bar
  • Minimum Operating Temperature: -50 to -10 °C
  • Maximum Operating Temperature: 100 °C
  • Maximum Surface Speed: 0.5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: Extremely High Pressure (> 500 bar)
Safety Warning

Full Product Description

The RS rotary sealing set consists of a high-strength thermoplastic slide ring with particularly stable thermal properties and an elastomer preloading element. The special contact surface geometry at the inner diameter of the slide ring with the patented (EP 0 643 243 B2) alternating pitch has a major benefical effect on the lubrication of the seal. This has a positive impact on both friction and wear. The preloading element responsible for the static sealing function has a rectangular cross section. Compared to O-rings, this has advantages with regard to contact load (sealing) and deformation behavior (pumping inside the groove). The dynamic interior sealing method is preferable. We do not recommend a dynamic exterior sealing arrangement. The slide ring compound used and its geometry allow use of the seal even under maximum permissible pressure (and in case of pressure peaks) without requiring additional anti-extrusion rings. At the same time, it is possible to take maximum advantage of the diameter play between rotor and stator without any functional impairment. In principle, the seal can also be used as an exterior end seal. In case of doubt, however, we recommend our C5 or C9 product series.

• Enhanced sealing performance in non-pressurized conditions.
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Long service life thanks to application-optimized compounds.
• Insensitive to pressure peaks.
• Improved lubrication due to pressure medium deposit in the dynamic contact area.
• Extremely high extrusion resistance.
• Installation in closed and undercut housings.

Range of application:
Primarily for alternating sealing of rotary applications in rotating tracks, pivot drives, hose reels, and in machine tool hydraulics.

Related Documents

Literature and Reference Materials
Hydraulic Seals--PTD3350
Rotary Shaft Seals From Parker--Landing Page
Compound Data Sheet NBR N3571
Installation Guidelines for Rotary Seals--PTD3350
Storage and Cleaning of Elastomer Seals--PTD3032
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
Mixing the right ingredients: Material Development at Parker-Prädifa
Parker Final Exam in Physics / Sealing Systems Put to the Test
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Products Inside Diameter (mm) Outside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
RS002500716 25 32.5 3.2 3.2 -35 100 PK (Polyketone)
RS004500716 45 51.6 4.1 4.1 -35 100 PK (Polyketone)
RS005000716 50 61 4.1 4.1 -35 100 PK (Polyketone)
RS005500716 55 61.6 4.1 4.1 -35 100 PK (Polyketone)
RS006000716 60 71 4.1 4.1 -35 100 PK (Polyketone)
RS007000716 70 81 4.1 4.1 -35 100 PK (Polyketone)
RS007500716 75 86 4.1 4.1 -35 100 PK (Polyketone)
RS008000716 80 91 4.1 4.1 -35 100 PK (Polyketone)
RS008500716 85 96 4.2 4.2 -35 100 PK (Polyketone)
RS009500716 95 110.5 6.3 6.3 -35 100 PK (Polyketone)
RS010000716 100 111 4.1 4.1 -35 100 PK (Polyketone)
RS010000719 100 111 4.1 4.1 -50 100 PK (Polyketone)
RS010500716 105 120.4 6.2 6.2 -35 100 PK (Polyketone)
RS011000716 110 121 4.2 4.2 -35 100 PK (Polyketone)
RS011200716 110 121 6.3 6.3 -35 100 PK (Polyketone)
RS012400716 124 139.2 6.1 6.1 -35 100 PK (Polyketone)
RS012500716 125 135.4 5.1 5.1 -35 100 PK (Polyketone)
RS014500716 145 160 6.2 6.2 -35 100 PK (Polyketone)
RS017000716 170 185.2 6.2 6.2 -35 100 PK (Polyketone)
RS021500716 215 230.5 6.2 6.2 -35 100 PK (Polyketone)
RS025000716 250 265.5 6.3 6.3 -35 100 PK (Polyketone)
OR060002700161B 60.0 75.5 3.2 3.2 -30 110 PS027
OR124002700161C 124.0 135.0 4.2 4.2 -30 110 PS027
OR124002700162D 124.0 139.5 6.3 6.3 -25 200 PS027
OR124002700164C 124.0 135.0 4.2 4.2 -40 150 PS027
OR280005200161D 280.0 295.5 6.3 6.3 -30 110 PS052
RS021000720 210.0 225.5 6.3 6.3 -35 100 PK (Polyketone)
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