Non-Asbestos Gaskets and Non-Asbestos Gasket Materials

27 May 2020

Gaskets are mechanical seals that are often used in closing the gap between two or more mating surfaces. In any given operating conditions, filling the space between surfaces or connecting flanges is crucial to prevent leakages. Fortunately, the overall properties of gaskets allow them to seal the irregularities of each surface without worrying about the disastrous effects of leakage and even vibration.

Several parameters are often considered in manufacturing gaskets. For one, different gaskets are designed to withstand a certain temperature range. Additionally, their capability to handle pressure, specific types of fluid, and corrosion is also considered in making the gaskets. Another element that affects the overall properties of gaskets is its material.

All About Non-Asbestos Gaskets

One of the simplest types of gaskets today is non-asbestos gaskets. These gaskets can be further grouped as either full-face type for full-face flanges or flat ring type for raised face flanges. They are normally manufactured by cutting graphite, organic or inorganic non-asbestos sheets through water jet cutting machines. Non-asbestos gaskets are normally suited for low pressure, low temperature, non-critical piping, and plumbing applications.

Asbestos gaskets have been proven to demonstrate health risks whenever they are produced, used, and disposed of. For this reason alone, health experts hugely recommend and endorse the use of non-asbestos gaskets in different applications since these gaskets do not pose danger to human health. The production, application, and disposal of non-asbestos gaskets are way safer than their counterpart.

Materials of Non-Asbestos Gaskets

In selecting the right material for non-asbestos gaskets, one must consider multiple factors that include fluid, temperature, pressure, laws of fugitive emissions, and mechanical issues. The ASME B16.21 specification can also help you determine some features of non-asbestos sheet gaskets as it covers the types, sheet materials, dimensions, dimensional tolerances, and marking requirements of non-asbestos gaskets.

Some of the most common materials in manufacturing non-asbestos gaskets include aramid fibres, glass fibres, elastomers, Teflon, graphite, and neoprene. These materials are often mixed with various binder materials like nitrile rubber, carbon graphite reinforced, glass reinforced, biaxially oriented PTFE, styrene-butadiene, ethylene propylene, fluorocarbon, graphite, chlorosulfonated polyethylene, ceramic fibre, and mica sheet.

Coating non-asbestos gaskets with graphite are also possible so that they obtain non-stick and steam resistance. A non-asbestos gasket coated with polytetrafluoroethylene ensures the gasket’s excellent chemical resistance. As for potable water applications, a non-asbestos gasket must be coated with Ethylene Propylene Diene Monomer. If you want to know more about non-asbestos gaskets, feel free to ask us at Gasketech. We are a manufacturer and supplier of gaskets and sealing washers, extrusions, and mouldings for all industries. Moreover, we are always ready to solve sealing and leakage problems and service you with a supply of gaskets for imported and local machinery working in local conditions.

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