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PARKER RS ROTARY SEAL

    RS Rotary Seal

    Descriptions

    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 crosssection. 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.

    Features

    • Enhanced sealing performance in nonpressurized conditions.
    • Robust seal profile for harshest operating conditions.
    • Extreme wear resistance.
    • Long service life thanks to applicationoptimized 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.

    Operating pressure ≤ 500 bar
    Operating temperature -35 °C to +100 °C
    Sliding speed ≤ 0.5 m/s

    Recommendation for rotary transmissions:
    P × v ≤ 40 for L = 4.1 to 4.2
    P × v ≤ 70 for L = 6.0 to 6.3
    (For definition see catalogue „Hydraulic Seals“, chapter „Rotary Seals“, introduc tion.)

    Compounds
    The standard compound for the slide ring is a thermoplastic compound (W5071) with
    outstanding physical properties.
    The expander ring consists of our tried and proven standard NBR compound N3571
    with 70 Shore A. For higher temperatures, we recommend HNBR compounds.
    Installation
    The axial fit of the seal is especially narrow and suitable for grooves conforming to
    DIN ISO 7425. This benefits the total installation length of the rotary transmissions.
    By selecting suitable compounds, snap installation depending on profile width down
    to rotor diameter of app. 30 mm is possible. Below that, we recommend axially open
    grooves for installation.

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