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    Home / Industrial O Rings / FKM O-Rings

    FKM O-Rings

    FKM O-rings for Higher Temperatures and More Demanding Media

    FKM O-rings are fluoroelastomer seals designed for applications where standard materials are insufficient in terms of temperature or chemical resistance. They offer excellent resistance to mineral oils, fuels, lubricants, hydrocarbons, ozone, and ageing.

    Thanks to their stable performance at higher operating temperatures, they are suitable for industrial applications, service and maintenance, vacuum technology, pumps, valves, hydraulic systems, pneumatics, and machinery. The typical operating range of FKM is approximately −20 °C to +200 °C, with short-term exposure to higher temperatures depending on the specific compound.

    FKM-O-Kroužek-specifikace-wider

    FKM O-rings are not ideal for hot water, steam, extreme cold, ammonia, and certain polar solvents.

    Note: FKM O-rings, Viton type O-rings, Fluoroelastomer seals, High temperature O-rings, Chemical resistant O-rings

    Bestsellers

    O-Ring 18 x 5 FKM 70
    In stock
    Code: 00151
     
    28 Kč
    O-Ring 7.65 x 1.78 FKM 60
    In stock
    Code: 00105
     
    55 Kč
    O-Ring 21.6 x 2.4 FKM 60
    In stock
    Code: 00052
     
    22 Kč
    O-Ring 17 x 3 FKM 70
    In stock
    Code: 00186
     
    12 Kč
    Page 1 of 6 - 137 items total

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    O-KROUŽEK 57,15 × 3,53 FKM 80
    O-RING 57.15 × 3.53 FKM 80
    In stock
    79 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 01032
    635 O KROUŽEK 11,5 x 3 FKM 70
    O-Ring 11.5 x 3 FKM 70
    The average product rating is 5,0 out of 5 stars.
    In stock
    14 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00195
    O KROUŽEK 9 x 2,5 FKM 70
    O-Ring 9 x 2.5 FKM 70
    In stock
    12 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00194
    629 O KROUŽEK 12,29 x 3,53 FKM 70
    O-Ring 12.29 x 3.53 FKM 70
    In stock
    12 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00193
    O Ring Black Viton
    O-Ring 19 x 3 FKM 70
    In stock
    22 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00192
    620 O KROUŽEK 12,42 x 1,78 FKM 70
    O-Ring 12.42 x 1.78 FKM 70
    In stock
    22 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00190
    O KROUŽEK 6 x 2 FKM 70
    O-Ring 6 x 2 FKM 70
    In stock
    18 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00189
    O Ring Black Viton
    O-Ring 22.2 x 3 FKM 80
    In stock
    36 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00187
    O Ring Black Viton
    O-Ring 17 x 3 FKM 70
    In stock
    12 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00186
    O Ring Black Viton
    O-Ring 14 x 2 FKM 70
    In stock
    12 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00184
    O Ring Black Viton
    O-Ring 29 x 3 FKM 70
    In stock
    32 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00183
    O KROUŽEK 56 x 2 FKM 70
    O-Ring 56 x 2 FKM 70
    In stock
    32 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00182
    O KROUŽEK 85 x 3 FKM 70
    O-Ring 85 x 3 FKM 70
    In stock
    38 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00180
    O KROUŽEK 45 x 2 FKM 70
    O-RING 45 x 2 FKM 70
    In stock
    18 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00177
    O KROUŽEK 40 x 1,5 FKM 70
    O-Ring 40 x 1.5 FKM 70
    In stock
    24 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00176
    O KROUŽEK 58 x 2 FKM 70
    O-Ring 58 x 2 FKM 70
    In stock
    19 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00175
    O Ring Black Viton
    O-Ring 27 x 2.5 FKM 70
    In stock
    18 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00174
    O KROUŽEK 38 x 2 FKM 70
    O-Ring 38 x 2 FKM 70
    In stock
    22 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00171
    O KROUŽEK 55 x 3 FKM 70
    O-RING 55 x 3 FKM 70
    In stock
    38 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00169
    O Ring Black Viton
    O-Ring 15 x 2 FKM 70
    In stock
    14 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00168
    551 551 o krouzek 10x3 fkm 70
    O-Ring 10 x 3 FKM 70
    In stock
    14 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00167
    O KROUŽEK 8,3 x 2,4 FKM 70
    O-RING 8.3 x 2.4 FKM 70
    In stock
    18 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00165
    O Ring Black Viton
    O-Ring 28 x 5 FKM 70
    In stock
    24 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00162
    O KROUŽEK 40 x 3 FKM 70
    O-Ring 40 x 3 FKM 70
    In stock
    32 Kč

    Premium sealing for extreme conditions – FKM O-rings excel in high chemical and temperature resistance, making them ideal for demanding industrial applications, vacuum systems,...

    Code: 00161

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    137 items total
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    Marking and Properties of FKM O-Rings

    FKM is the designation for fluoroelastomer rubber. This material is used for seals that must withstand higher temperatures, oils, fuels, lubricants, hydrocarbons, and a range of industrial media over the long term. In practice, FKM is often used where common elastomers such as NBR, EPDM, or VMQ are unsuitable in terms of chemical resistance or thermal stability.

    Marking example: O-ring 46×2 FKM 75:

    46×2 – O-ring internal diameter 46 mm and cross-section/profile thickness 2 mm.
    FKM – fluoroelastomer rubber material.
    75 Shore A – material hardness.

    O-ring dimensions are typically specified by the internal diameter d1 and the cross-section d2. When selecting, it is important to verify not only the dimension, but also the material, hardness, operating temperature, medium, and type of load.

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