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    Home / Industrial O Rings

    O-Rings – Reliable Sealing For Demanding Industry

    O-rings by material, size and application

    O-rings are among the most commonly used sealing elements in industry, servicing and general maintenance. They are used for static and selected dynamic seals in hydraulics, pneumatics, pumps, valves, gearboxes, vacuum technology and other mechanical applications.

    Our range includes O-rings made from NBR, EPDM, FKM, FFKM and VMQ / MVQ materials. Each material has different properties – they differ in temperature range, chemical resistance, and suitability for oils, fuels, water, steam, glycols, vacuum or outdoor use.

    When selecting an O-ring, it is important to verify not only the size, but also the material, hardness, operating temperature, medium and type of stress. O-ring size is typically determined by the inner diameter d1 and cross-section d2.

    Teplotní rozsah O kroužky Watto CZ_1

    Note: O-rings, O-ring seals, elastomer O-rings, sealing rings, NBR O-rings, EPDM O-rings, FKM O-rings, FFKM O-rings, VMQ / MVQ silicone 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 10 x 2,5 NBR 70
    In stock
    Code: 01007
     
    8 Kč
    Page 1 of 10 - 229 items total

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    O krouzek Gardena
    Gardena O-ring for garden connectors and adapters
    The average product rating is 5,0 out of 5 stars.
    In stock
    15 Kč

    O-ring 11x2.5 mm NBR 70 as a replacement seal for garden connectors, Y-pieces, splitters, G3/4 and G1 tap adapters, sprayers and showers Gardena, Fiskars, Lux and others. It is...

    Code: 00093A
    Dupont Kalrez 151.77 x 5.33 mm
    Kalrez® UltraPure™ O-ring AS-568 K#361 151.77×5.33 mm – FFKM
    In stock
    14 950 Kč

    Special DuPont Kalrez® UltraPure™ O-ring made of FFKM according to the AS-568 (K#361) standard. Size 151.77×5.33 mm, – for the most demanding process, vacuum and chemical...

    Code: 00197B
    Dupont Kalrez 42x5.00mm
    Free shipping
    Kalrez® UltraPure™ O-ring KF/NW40 42×5 mm – FFKM
    In stock
    4 438 Kč
    5 590 Kč (–20 %)

    Special DuPont Kalrez® UltraPure™ O-ring made of FFKM (perfluoroelastomer) for KF/NW40 vacuum connections. Size 42×5 mm, compound 8900 – for demanding applications with high...

    Code: 00197A
    26 o ring NBR PK
    O RING 10 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01006
    26 o ring NBR PK
    O RING 10 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01007
    26 o ring NBR PK
    O RING 11 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01008
    26 o ring NBR PK
    O RING 12 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01009
    O kroužek 13 x 2 Bateriový
    O RING 13 × 2 VMQ 70 – silicone, red
    In stock
    22 Kč

    Red Silicone O-Ring - 13 × 2 mm, VMQ 70, High Temperature Resistance and Long-Term Elasticity Suitable for fittings, taps, valves, pumps, laboratory equipment and other...

    Code: 01029
    O kroužek 13 x 2 Bateriový
    O RING 13 × 2,5 VMQ 70 – silicone, red
    In stock
    22 Kč

    Red Silicone O-Ring 13 x 2.5 mm - VMQ 70, High Temperature Resistance and Long-Term Elasticity Suitable for fittings, taps, valves, pumps, laboratory equipment and other...

    Code: 01030
    O kroužek 13 x 2 Bateriový
    O RING 13 × 3 VMQ 70 – silicone, red
    In stock
    22 Kč

    Red Silicone O-Ring 13 x 3 mm - VMQ 70, High Temperature Resistance and Long-Term Elasticity Suitable for fittings, taps, valves, pumps, laboratory equipment and other...

    Code: 01031
    26 o ring NBR PK
    O RING 13 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01010
    26 o ring NBR PK
    O RING 14 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01011
    107 O KROUŽEK 14,6 x 2,4 NBR 60
    O RING 14.6 x 2.4 NBR 60
    In stock
    11 Kč

    Reliable NBR O-ring – the ideal choice for everyday sealing applications thanks to its resistance to oils, fuels and excellent mechanical properties. It is most commonly used in...

    Code: 00019
    O Ring Black Viton
    O Ring 158.1 x 5.3 FKM 75
    In stock
    242 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: 00127
    26 o ring NBR PK
    O RING 16 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01012
    26 o ring NBR PK
    O RING 18 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01013
    26 o ring NBR PK
    O RING 18 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01014
    26 o ring NBR PK
    O RING 19 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01015
    26 o ring NBR PK
    O RING 20 x 3,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01021
    26 o ring NBR PK
    O RING 21 x 2,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01016
    26 o ring NBR PK
    O RING 22 x 2 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01017
    26 o ring NBR PK
    O RING 22 x 3,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01022
    26 o ring NBR PK
    O RING 23,5 x 3,5 NBR 70
    In stock
    8 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01023
    26 o ring NBR PK
    O RING 25 x 3,5 NBR 70
    In stock
    9 Kč

    Black NBR 70 O-ring for reliable sealing of water, oils, air and other common operating media. Suitable for plumbing work, fittings, valves, pumps, pneumatics and industrial...

    Code: 01024

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    229 items total
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    O-Ring Materials and Their Applications

    NBR O-Rings

    NBR is a common and economical material for industrial sealing. It is primarily suitable for applications with mineral oils, lubricants, fuels and hydraulic fluids. It is used in hydraulics, pneumatics, gearboxes, pumps and general servicing.

    Typical applications:
    • oils and fuels,
    • hydraulics and pneumatics,
    • general industrial applications,
    • servicing of machinery, pumps and gearboxes.

    EPDM O-rings

    EPDM is suitable for water, steam, glycols, heating, sanitation and outdoor use. It is highly resistant to weathering, ozone and ageing. However, it is not suitable for mineral oils and fuels.

    Typical applications:
    • water and glycol,
    • heating and sanitation,
    • steam depending on specific conditions,
    • outdoor applications,
    • applications requiring ozone and ageing resistance.

    FKM O-Rings

    FKM is a material for higher temperatures and more demanding media. It is highly resistant to mineral oils, fuels, lubricants, hydrocarbons, ozone and ageing. It is used in industry, vacuum technology, pumps, valves, engines and gearboxes.

    Typical applications:
    • oils and fuels,
    • higher operating temperatures,
    • vacuum technology,
    • industrial media,
    • service and maintenance,
    • pumps, valves and rotary units.

    FFKM O-Rings

    FFKM is among the most resistant elastomers for extremely demanding applications. It is used where standard materials such as NBR, EPDM, FKM or VMQ are insufficient in terms of chemical and temperature resistance. Typically, this involves aggressive chemicals, high temperatures, vacuum applications and technologically demanding operations.

    Typical applications:
    • aggressive chemicals,
    • extreme operating conditions,
    • high temperatures,
    • vacuum and semiconductor technology,
    • chemical and process industries.

    VMQ / MVQ Silicone O-Rings

    VMQ / MVQ is a silicone rubber suitable for applications with both high and low temperatures. Silicone is highly resistant to ozone, UV radiation and weathering effects. It is mainly suitable for static sealing where flexibility and stability across a wide temperature range are required. It is not ideal for mineral oils, fuels, high abrasion and dynamic stress.

    Typical applications:
    • high and low temperatures,
    • static sealing,
    • outdoor use,
    • ozone and UV radiation,
    • sanitation, heating, service and maintenance.

    Quick Application Guide

    For oils, fuels, and hydraulics, NBR or FKM is most commonly used.
    For water, glycol, heating, and outdoor use, EPDM is suitable.
    For higher temperatures, oils, fuels, and vacuum, FKM is suitable.
    For aggressive chemicals and extreme operations, FFKM is suitable.
    For a wide temperature range, ozone, UV, and static sealing, VMQ / MVQ is suitable.

    What to watch out for

    No single material is ever ideal for everything. An O-ring that works well in oil may not be suitable for steam. A material suitable for water may not resist fuels. Silicone handles a wide temperature range but is not ideal for abrasion and dynamic applications. FKM is very good for oils and fuels but is not ideal for hot water and steam.

    We recommend verifying the following before purchase:

    • dimension d1 × d2,
    • O-ring material,
    • Shore A hardness,
    • operating temperature,
    • chemical medium,
    • pressure,
    • whether it is a static or dynamic application.

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