Piston sealing set Prädifa series OG, Polon® | Parker NA
687424
687424

Piston sealing set Prädifa series OG, Polon®

Piston sealing set for hydraulic cylinders, single-acting, PTFE slipper seal design. Low friction. For high-pressure applications. ISO 7425.

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Product Overview
Description
    The single-acting OG piston sealing set featuring a Slipper Seal® design consists of a PTFE piston sealing ring and an elastomer O-Ring as a preloading element. The asymmetrical cross-section of the sealing ring is designed for best drag oil performance during stroke in both directions. The OG sealing set is particularly suitable for single-acting pistons in control cylinders, servo controlled systems, machine tools and quick-acting cylinders. Due to the material combination of the slide ring (PTFE) and the O-ring (elastomer), this product is suitable for a wide range of applications, especially for aggressive media and/or high temperatures. Several compounds can alternatively be selected according to the specific application profile.

    • Good sealing performance in extremely small assembly conditions.
    • Excellent wear resistance.
    • Minimal break-away and dynamic friction and no stick-slip tendency ensures uniform motion even at low speeds.
    • Good energy efficiency due to low friction.
    • Insensitive to pressure peaks.
    • High temperature resistance assured by suitable O-Ring compound selection.
    • High extrusion resistance.
    • Adaptable to nearly all media thanks to high chemical resistance of the sealing ring and large O-Ring compound selection.
    • Dimensions according to ISO ­7425-1.
    • Also available as double-acting version.
    • Short axial assembly length.
    • Installation in closed and undercut housings.
    • Available in diameters from 4 to 3000 mm.
    • Further dimensions of machined series with short lead times available.

    Range of application:
    For high-pressure applications.
    The OG sealing set is particularly suitable for single-acting pistons in control cylinders, servo controlled systems, machine tools and quick-acting cylinders.
Tech Specifications
Description

Performance Characteristics

Thermal Application Type

High Temperature (< 205°C)
Expanded Low and High Temperature (< -35 to 140°C)
Standard Moderate Temperature (-35 to 100°C)

Media

Hydraulic

Polymer Material Options

Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)
Ultra-High Molecular Weight Polyethylene (UHMW-PE)

Maximum Operating Pressure

400 bar

Minimum Operating Temperature

-40 to -25 °C

Maximum Operating Temperature

110 to 200 °C

Maximum Surface Speed

4 m/sec

Unit of Measure

Length: mm

Cushioning Mechanism

No

Pressure Rating

High Pressure (< 500 bar)

CAD
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