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Piston seals for hydraulic cylinders

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  • The design of a piston seal is crucial for the function of the entire assembly. There is a wide range of profiles on the market – we help our customers and interested clients to make the optimal selection.

    Standard profiles

    By the standard profiles shown, we mean seals that represent the state of the art. We manufacture these standard seals ourselves or supply them as moulded parts from tested partners for all required groove dimensions from a variety of materials. Inch and intermediate sizes, but also largest diameters up to 3000 mm can be realized.

    Depending on the quantity, the material and your requirements, we can offer you seals from the appropriate manufacturing process – all from a single source!

    You can also find a general overview and further information in the following categories:

    • U-Cups and chevron sets
    • Compact piston seals
    • Piston seals with leader elements made of elastomer
    Choosing the correct profile

    The more information is known, the better the sealing system can be adapted to the application.

    To choose the right profile and the optimal material, the following criteria are important:

    • installation space
    • double-acting or single-acting
    • pressure range
    • temperature range
    • medium
    • stroke speed
    • counterface
    • mounting possibility
    • friction behavior
    • stick-slip behavior
    • tightness
    • service life expectancy
    • price
    • availability

    Piston seals – U-Cups and chevron sets

    Application U-Cups
    • high tightness
    • for all hydraulic and pneumatic applications
    • one-sided, symmetrical sealing profile
    • assembly in closed grooves possible
    • many dimensions available as molded parts
    • inch and intermediate sizes as well as largest diameters can be realized
    Application chevron sets
    • high tightness
    • single acting sealing element
    • available in slotted design
    • fields of application: mining, presses, special machine construction
    • adjustable if required
    Pressure range:

    up to 400 bar*

    Sliding speeds:

    up to 0,5 m/s

    Temperature range:

    -55 to +220 °C (depending on material)

    * Special solutions for U-Cups for higher pressures up to 700 bar can be realized!

    Compact piston seals


    The compact piston seal is a double-acting sealing and guiding element. It is available in various designs and is ideally suited to a wide range of applications. In principle:

    • universal use with standard cylinders
    • cost-effective with standard dimensions
    • compact installation space
    Pressure range:

    up to 400 bar

    Sliding speeds:

    up to 0,5 m/s

    Temperature range:

    -55 to +220 °C (depending on material)

    Piston seals with leader elements made of elastomer

    • single-acting and double-acting sealing elements
    • universal application
    • wide range of materials
    • low friction
    • high sliding speeds
    • no stick-slip effect
    • small installation space
    • long service life
    • inch and intermediate sizes up to a diameter of 3000 mm can be realized
    Pressure range:

    up to 600 bar

    Sliding speeds:

    up to 15 m/s

    Temperature range:

    -55 to +280 °C (depending on material)