Products / Parker / Seal and O-Rings / Rotary Sealing Set Praedifa Series RS
Rotary seal for rotary distributors. Dynamic function on inner diameter. Double-acting. For highest-pressure applications. ISO 7425.
The profile RS rotary sealing set consists of
a high-strength thermoplastic slide ring with particularly stable
thermic properties and an elastomer expander ring. The special
contact surface geometry at the inner diameter of the slide ring
with the patented (EP 0 643 243 B2) altering pitch has a major
benefical effect on the lubrication of the seal. This impacts
positively on both friction resistance and wear. The expander ring
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 a final exterior sealing device. In
case of doubt, however, we recommend the use of our profiles C5 or
C9.
• 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.