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Z - Gaskets - Nieuw

Gaskets

Gaskets are seals used to create a liquid- and gas-tight connection between two components. They are used in machinery, installations, piping systems, pumps, valves and industrial equipment. By placing a gasket between two sealing surfaces and compressing the connection, small surface irregularities are filled and leakage can be prevented.

Techniparts supplies various types of gaskets in different materials, thicknesses, shapes and dimensions. Depending on the application, materials such as rubber, PTFE, graphite, mica, hard paper, laminated fabric or felt can be selected. If a standard version is not suitable, custom-made gaskets are also available.

 
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What is a gasket?

A gasket is a sealing material placed between two components. When the connection is assembled, the gasket is compressed between the sealing surfaces. This fills small irregularities in the surfaces and creates a seal that prevents liquids or gases from escaping. Gaskets are widely used in connections that are regularly dismantled or where two fixed surfaces are mounted against each other.

The correct version depends on the construction and the conditions in which the seal is used.

When selecting a gasket, factors such as material, thickness, dimensions, temperature, pressure and medium are important. A gasket suitable for water, for example, is not automatically suitable for oil, fuels or chemicals. The way in which the gasket is installed also affects its performance and service life. It is therefore important to match the seal to the complete application rather than selecting it only by shape or dimensions.

What should you consider when selecting a gasket?

Material

The material of a gasket largely determines the properties of the seal. Different materials are designed for different operating conditions. Rubber materials, for example, can provide good sealing where flexibility and close contact with the sealing surfaces are important. PTFE is often selected for its good chemical resistance, while graphite and mica are used in applications where higher temperatures are important.

Hard paper, laminated fabric and felt also have their own areas of application. It is therefore not advisable to select a material solely on the basis of its shape or price. The material properties must match the conditions in which the gasket is used.

Temperature

The operating temperature of a gasket is important for its service life. Each material has a specific temperature range within which it performs effectively. At excessive temperatures, a material can harden, deform or lose its sealing properties. At low temperatures, some materials may become less flexible. In addition to the normal operating temperature, possible temperature peaks must also be considered.

For applications involving high temperatures, graphite and mica gaskets may be suitable. The final choice also depends on pressure, medium and the construction of the connection.

Pressure

The pressure within an installation also influences the selection of a gasket. The seal must be able to withstand the pressure acting on the connection during operation. At higher pressures, different requirements apply to the gasket material, thickness and construction. The way in which the gasket is compressed is also important.

If the gasket is not compressed sufficiently, leakage may occur. Excessive compression can damage the material or cause permanent deformation. The design must therefore always be matched to the connection in which it is installed.

Medium

The medium with which a gasket comes into contact plays an important role in material selection. Water, oil, fuel, air, steam and different chemicals all have different properties. A material that performs well with water may be less suitable for oil or certain chemicals. Combinations of different media can also affect service life. When selecting a gasket, all substances with which the seal may come into contact during operation should therefore be considered.

Types of gaskets

Gaskets are available in different materials, shapes and designs. The correct type depends on the application and the requirements placed on the seal. A flat gasket can, for example, be used between two flanges, while a specific shape may be required when a machine component has a non-standard geometry. The material also varies depending on the application.

For high-temperature applications, graphite or mica may be used, while PTFE can be suitable where high chemical resistance is required. Rubber versions are widely used where flexibility and good contact with the sealing surface are important.

Techniparts supplies various gasket types and materials. Below is an overview of important versions. The individual product pages provide more information about the properties and applications of each material.

Graphite tanged insert gaskets

Graphite tanged insert gaskets are used in sealing applications where temperature and chemical exposure are important factors. The material consists of graphite reinforced with a metal insert. This provides a combination of flexibility and mechanical strength. Suitability depends on factors including temperature, pressure and medium. View the options and technical information on our page about graphite tanged insert gaskets.

Mica gaskets

Mica gaskets are intended for applications involving high temperatures. Mica is a heat-resistant material used in various technical applications. Final suitability always depends on the conditions in which the gasket is used. For more information about the available versions, visit our page about mica gaskets.

PTFE Teflon gaskets

PTFE gaskets, also known as Teflon gaskets, are widely used when high chemical resistance is required. PTFE has properties that can make the material suitable for various aggressive media. In addition to chemical resistance, temperature, pressure and the construction of the connection must also be considered. View our range of PTFE Teflon gaskets for more information.

Rubber gaskets

Rubber gaskets are widely used where flexibility and good contact with the sealing surfaces are important. Different rubber materials are available, each with its own properties in terms of temperature, media resistance and mechanical loading. The correct rubber quality therefore depends on the application. View the available versions on our page about rubber gaskets.

Hard paper and Pertinax gaskets

Hard paper, also known as Pertinax, is used for technical seals where a dimensionally stable design is required. The material has different properties from flexible rubber seals and is therefore used for specific applications. The dimensions and operating conditions determine which version is suitable. More information is available on the page about hard paper and Pertinax gaskets.

Laminated fabric and Celleron gaskets

Laminated fabric, also known as Celleron, is a technical sheet material that can be used for various sealing and construction applications. Its properties make it suitable for applications where a dimensionally stable seal is required. The correct choice depends on the construction and the conditions in which the gasket is used. View our page about laminated fabric and Celleron gaskets.

Felt gaskets

Felt gaskets and felt rings are used for various technical sealing and lubrication applications. Felt has a different structure and sealing action from materials such as rubber or PTFE. This can make it suitable where a soft and flexible seal is required. View our range of felt gaskets and felt rings.

Custom-made gaskets

Not every connection can be sealed using a standard gasket. Machines and installations often contain non-standard dimensions, shapes and bolt-hole patterns. In these cases, a custom-made gasket can be produced. The outside dimensions, inside dimensions, thickness, shape and mounting holes can all be taken into account. The material can also be selected to match the application.

An existing gasket, technical drawing or clear dimensional information can be used as the starting point.

When requesting a custom gasket, it is useful to provide as much technical information as possible. This includes the dimensions, material, temperature, pressure and the medium with which the seal will come into contact. For more information, view our page about custom-made gaskets.

Chemical resistance of gaskets

The chemical resistance of a gasket is important when the seal comes into contact with oil, fuels, water, acids, alkalis, solvents or other chemicals. Not every sealing material reacts to these substances in the same way. A material may perform well under certain conditions but age or become damaged rapidly under different operating conditions.

When selecting a gasket, the specific medium with which the seal comes into contact must therefore always be considered.

Temperature also affects chemical resistance. When aggressive media are combined with high temperatures and industrial operating conditions, correct material selection becomes even more important. If you are unsure whether a material is suitable, the complete application should be assessed and the material properties compared with the operating conditions.

Applications of gaskets

Gaskets are used in a wide range of technical applications where reliable sealing is required. Examples include piping systems, flange connections, pumps, valves, compressors, machinery and industrial installations. The requirements differ from one application to another. A gasket in a water pipeline, for example, is exposed to different conditions from a seal used in an installation handling oil, steam or chemicals.

The gasket design must therefore always be matched to the specific operating conditions.

In addition to the medium, temperature, pressure, mechanical loading and available installation space are important. For a non-standard application, a standard version may not be sufficiently suitable. In that case, another material or a custom-made gasket may provide a better solution. By identifying the construction and operating conditions in advance, the correct seal can be selected.

Frequently asked questions about gaskets

What is a gasket?

A gasket is a sealing material placed between two components. By compressing the connection, the material is pressed against the sealing surfaces. This fills small surface irregularities and prevents liquids or gases from passing through the connection. Gaskets are available in various materials, thicknesses, shapes and dimensions. The correct version depends on the application and the operating conditions.

Which material should I choose for a gasket?

The material selection depends on the conditions in which the gasket is used. Factors such as medium, temperature and pressure must be considered. Rubber materials may be suitable for some applications, while PTFE, graphite, mica, hard paper, laminated fabric or felt may be used under other conditions. There is therefore no single material suitable for every application. The properties of the selected material must match the operating conditions.

Can I have a custom gasket made?

Yes. For applications where a standard version is not suitable, a custom gasket can be produced. Different dimensions, shapes, thicknesses and hole patterns can be taken into account. An existing gasket can be used as a sample, while a technical drawing or clear dimensional information can also be used as the starting point. The correct material must also be determined for the application.

View our custom-made gaskets.

How do I measure a gasket?

When measuring an existing gasket, several dimensions are important. If possible, measure the inside dimension, outside dimension and material thickness. For a version with mounting holes, the number of holes, their diameter and the spacing between them must also be checked. For a non-standard shape, a technical drawing can be made or the existing gasket can be used as a sample. The material is also important because not every material is suitable for the same temperature, pressure or medium.

What should I consider when ordering a gasket?

When ordering a gasket, check not only the dimensions but also the material, thickness, temperature, pressure and medium. For an existing gasket, it can be useful to collect all available information before ordering a replacement. For a non-standard shape or size, a technical drawing, clear dimensions or an existing gasket can be used as the starting point. This makes it easier to determine which version is suitable for the application.

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