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Rubber seals and O-rings to drawing or size.
System partner for seals
Rubber seals are functional sealing elements made from elastomers that prevent the escape of liquids or gases in industrial assemblies while at the same time protecting components from external influences.
In industry and trade, rubber seals are frequently manufactured to technical drawing or as a precisely fitting cut piece. Dimensional accuracy, material selection and defined tolerances are decisive for a permanently reliable seal in the respective area of application.
For applications with fixed dimensions and clear specifications, production is carried out as custom-made rubber seals, matched to the installation situation, medium and mechanical load.
Rubber seals to technical drawing
Rubber seals to technical drawing
are used when the shape, installation space or sealing surface must be precisely defined. The technical drawing clearly specifies the contour, dimensions and installation situation and serves as the binding basis for production. For clean implementation, the following details in particular are relevant: outer and inner contours, material thickness, permissible tolerances as well as information on the medium used and the temperature and media load. These parameters determine the technical design of the seal. Already during the drawing process, the choice of a suitable elastomer plays a central role. Depending on the medium and temperature, different materials are used, such as
for applications exposed to weathering and ozone.
Sponge rubber seals
Sponge rubber seals are versatile sealing materials characterised by their flexibility, elasticity and excellent adaptability to different surfaces and applications.
Cellular rubber seals
Cellular rubber seals are high-quality sealing materials characterised by their closed-cell structure. This structure gives the seals excellent elasticity, low water absorption and outstanding insulating properties.
O-rings
O-rings are sealing elements used in numerous industrial applications to seal liquids or gases. They are characterised by their ring-shaped, round cross-section and are typically made from elastic material such as rubber or plastic.
Flat gaskets
Flat gaskets are components in industrial applications. These seals are used to ensure a reliable seal between two surfaces and to prevent the escape of liquids or gases.
Flanged seals
Flanged seals are specialised sealing components developed to ensure a safe and reliable seal in connections of pipelines, vessels and other industrial plants.
Rubber steel seals
Rubber-steel seals are specialised seals consisting of a combination of steel and rubber. This construction combines the mechanical strength of steel with the flexibility and sealing capability of rubber.
Screen seals
Screen seals are specialised seals equipped with an integrated filter element to filter solid particles or impurities out of liquids and gases.
Custom-cut rubber
Rubber cut pieces are precisely cut sealing materials tailored specifically to the requirements of your application. These cut pieces are made from high-quality elastomeric materials and offer excellent sealing performance, flexibility and resistance to various influences.
Sleeves
Rubber sleeves are flexible sealing elements used for sealing and protecting connections, transitions and components in various industrial applications.
EPDM seal
EPDM seals are sealing elements manufactured from ethylene propylene diene monomer (EPDM), a synthetic rubber. Due to its excellent physical properties and its resistance to weathering, ozone and UV radiation, this material is frequently used in industry and construction.
NBR seal
NBR seals are sealing elements manufactured from nitrile rubber (NBR), a synthetic rubber. Due to its excellent resistance to oils, greases and fuels, this material is frequently used in the automotive industry and in mechanical engineering.
SBR seal
SBR seals are sealing elements manufactured from styrene-butadiene rubber (SBR), one of the most commonly used synthetic rubbers. SBR is known for its good abrasion resistance, elasticity and general resilience. These properties make SBR seals a popular choice in various industrial applications.
VITON seal
Viton seals are sealing elements manufactured from fluoro rubber (FKM), a highly resistant synthetic elastomer. This material is particularly valued for its outstanding chemical resistance and high temperature resistance and is widely used in demanding industrial environments
FKM seal
FKM seals, also known under the brand name Viton seal, are sealing elements manufactured from fluoroelastomers (fluoro rubber). This synthetic rubber is particularly known for its outstanding resistance to high temperatures and aggressive chemicals and is therefore frequently used in demanding industrial applications.
The properties of rubber seals
The technical properties of rubber seals determine their suitability for different industrial areas of application. Elasticity, media resistance and long-term behaviour under pressure are decisive here.
- High elasticity for adapting to unevenness and for reliably sealing joints
- Resistance to media such as water, oils, fuels or chemicals depending on the material
- Suitability for use in defined temperature ranges, depending on the material selection
- Good ageing, ozone and UV resistance with suitable elastomers
- Low compression set for a permanently consistent sealing effect
- Resistance to vibrations and dynamic loads
Material variety for rubber seals
A broad selection of elastomers is available for industrial applications. The choice of material depends on the medium, temperature, mechanical load and ambient conditions.
Commonly used materials include NBR, FKM, EPDM, silicone, CR and PTFE. Particularly widespread are NBR seals, as they offer high resistance to oils, greases and fuels and are suitable for numerous applications in mechanical and plant engineering.
Other elastomers such as HNBR, FVMQ, FEPM, ACM or natural rubber cover special requirements, such as increased temperature resistance, chemical resistance or high elasticity.
The targeted selection of material ensures that the rubber seal remains permanently functional and meets operational requirements.
The selection of the suitable material and an understanding of the specific operating conditions are decisive for the function and service life of rubber seals. Only when medium, temperature, pressure and installation situation are taken into account is a permanently reliable seal guaranteed.
Uses of rubber seals
Rubber seals are used wherever liquids or gases must be reliably sealed. Typical applications are found in engines, pumps, hydraulic and pneumatic systems, air conditioning systems, gearboxes, valves and fittings. They also perform a central sealing function in technical devices and systems of everyday use.
Tasks and functions
The primary task of rubber seals is to create a tight connection between two or more components. They prevent leaks, maintain system pressure and protect adjacent components from media escape. In addition, they can compensate for oscillations, damp vibrations and reduce noise.
What to look out for when selecting
When selecting a rubber seal, material, dimensions and operating conditions are decisive. Materials such as NBR, EPDM, silicone or FKM differ significantly in their resistance to media and temperatures. Careful matching to the substances used in the system prevents premature wear or material failure.
The right geometry is equally important. In addition to flat gaskets, O-rings are frequently used when a circumferential seal in grooves or bores is required. Correct dimensioning ensures that the seal is neither overloaded nor insufficiently compressed.
Rubber seals from BW-Gummi
BW-Gummi supplies rubber seals and O-rings for industrial applications, matched to technical requirements and defined areas of use. The products are used for customers from various industries in which reliability, dimensional accuracy and material quality are the focus.
O-rings as a special form of rubber seal
O-rings are ring-shaped rubber seals with a circular cross-section and are among the most frequently used sealing elements in industry. They are used when a circumferential seal in grooves or bores is required and components must be reliably sealed against one another.
Typical areas of use are static and dynamic seals in hydraulic and pneumatic systems, valves, pumps, cylinders and fittings. Due to their simple geometry, O-rings can be integrated in a space-saving manner and compressed evenly.
The function of an O-ring is based on defined elastic deformation. During installation, the ring is compressed and lies against the sealing surfaces. Pressure from the system additionally supports the sealing effect and ensures reliable separation of the media.
Material, dimensions and installation situation are decisive for operational safety. Depending on the medium, temperature and mechanical load, different elastomers are used. An overview of common designs and variants can be found in the O-rings section.
Typical areas of use of rubber seals in industry and trade
Rubber seals are used in a large number of industrial applications in which media must be safely contained or separated from one another. Their task is to avoid leaks and ensure the reliable operation of plants and components.
In mechanical and plant engineering, rubber seals are used among other things in pumps, valves, gearboxes and hydraulic systems. Here they must withstand permanent pressure, changing temperatures and mechanical loads.
Rubber seals also perform central functions in the automotive industry, for example in engines, fuel systems, air conditioning systems or cooling circuits. The materials used are matched to media such as oils, fuels or coolants.
Further areas of use are found in the chemical and process industry, food processing and medical technology. Depending on the industry, different requirements apply to resistance, hygiene or temperature behaviour.
Production and cutting of rubber seals
The production of rubber seals depends on the geometry, quantity and technical requirements of the application. Depending on the shape and material, seals are produced as punched parts, cut pieces from sheet material or as moulded components.
For simple contours and larger series, punching processes are frequently used. Complex geometries or smaller quantities are produced as precise cut pieces, in which contours are implemented exactly to size or drawing.
Clean edge quality and compliance with defined dimensions and tolerances are decisive for the function. Only in this way can even contact pressures and a reliable seal in the installed state be ensured.
Depending on the design, the requirements for installation also differ. While flat gaskets are compressed flat between components, O-rings require precisely designed grooves in order to develop their sealing effect correctly.
Quality, tolerances and fit accuracy
Dimensional accuracy and consistent quality are decisive for the function of rubber seals. Even minor deviations in contour or material thickness can impair the sealing effect or lead to premature wear.
Industrial rubber seals are therefore manufactured under defined production tolerances. These relate to both outer and inner dimensions as well as material thickness and surface quality. An even edge profile supports clean compression in the installed state.
The elastic recovery behaviour of the material is equally relevant. A low compression set ensures that the seal retains its shape even under permanent load and that the sealing function is maintained in the long term.
Particularly in dynamic applications or changing temperatures, the combination of suitable geometry and suitable material is crucial. Technical rubber seals for industrial applications are therefore designed for reproducible quality and stable material properties.
Advice and selection of the right rubber seal
The selection of the suitable rubber seal depends on several technical factors. In addition to the geometry, the operating medium, temperature range, pressure load and the type of movement in the sealing gap play a central role.
For a functional design, it is advisable to clearly define the requirements of the application. These include details on the installation situation, the desired service life as well as possible chemical or thermal influences.
Depending on these parameters, different designs and materials come into consideration. While flat gaskets are frequently used for static sealing, O-rings are particularly suitable for circumferential seals in grooves or bores.
Technical consultation in advance supports the selection of a seal that works reliably in the long term and meets operational requirements.
Frequently asked questions about rubber seals
What are rubber seals?
Rubber seals are elastic sealing elements made from elastomers that seal connections between components. They prevent the escape of liquids or gases and protect systems from external influences.
Where are rubber seals used?
Rubber seals are used in industry and trade, among other things, in mechanical and plant engineering, in automotive engineering, in the chemical and process industry as well as in hydraulic and pneumatic systems.
Which material is suitable for my application?
The material selection depends on the operating medium, temperature range and mechanical load. For oil- and fuel-based media, NBR seals are frequently used, while other elastomers are designed for high temperatures or weather-related loads.
Are rubber seals made to measure?
For many industrial applications, rubber seals are manufactured individually to measure or to technical drawing in order to ensure a precisely fitting seal in the respective installation situation.
What should be considered when selecting rubber seals?
The correct geometry, the suitable material selection as well as matching to medium, temperature and pressure are decisive. A clean design contributes significantly to the service life and functional reliability of the seal.
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