Gaskets are fabricated from a variety of materials, including elastomers, compressed non-asbestos sheet, foams and sponges, etc. This blog looks at compressed non-asbestos sheet as a gasket material and explains some of the differences and advantages from other gasket materials.

What is compressed non-asbestos sheet?

Previously, gaskets were often made from compressed asbestos. Due to the toxic nature of asbestos, this practice has been discontinued and replaced with gaskets made from compressed non-asbestos sheet and other materials.

Compressed non-asbestos sheet is a sealing material consisting of a blend of organic or inorganic fibers (such as aramid or fiberglass) together with an elastomeric binder. Because the elastomeric binder comprises the largest portion of the material, the type of binder used is a key factor to consider when choosing a compressed non-asbestos sheet for gasketing applications.

Manufacturers of compressed non-asbestos sheet produce a variety of materials that differ in the type of fibers and binders used and which are purpose-suited for specific applications. Some sheets are designed for general service applications, while others are designed for use in applications involving chemicals, oils, extreme temperatures, etc.

How does compressed non-asbestos sheet differ from elastomers?

An elastomer is a polymer which possesses an elastic property. Elastomers are generally thermoset materials which require curing through heat and pressure with the addition of sulphur or other curing agents. Natural and synthetic rubbers, such as styrene-butadiene rubber (SBR) and Buna-N (NBR), are elastomers.

Compressed non-asbestos sheet, in contrast, is a material that combines synthetic fibers with an elastomeric binder. The type of binder employed gives the sheet the properties of elasticity and flexibility, while the fibers used give the sheet specific sealing characteristics and properties.

When should I choose gaskets made from compressed non-asbestos sheet?

Compressed non-asbestos sheets have been developed to service a wide variety of sealing applications. These materials are an excellent choice for both general and severe service sealing applications.

Because compressed non-asbestos sheet employs various combinations of fibers and binders, sheet manufacturers are able to produce a range of sheets with different mechanical specifications. Gaskets made from compressed non-asbestos sheets have excellent sealing characteristics, torque retention, and heat and chemical resistance. These types of gaskets are an excellent choice for applications involving water, air, steam, oils, acids, and general chemicals.

In selecting a compressed non-asbestos sheet, reputable gasket fabricators will be able to provide education and guidance on the specific compressed non-asbestos sheet that is best suited for your particular sealing application.

How can CRG help with supplying gaskets from compressed non-asbestos sheet?

CRG maintains a wide range of compressed non-asbestos sheet materials from leading producers such as Teadit, Garlock, Interface Performance Materials, Triangle Fluid Controls, and others. Using these materials, we can custom fabricate gaskets that are purpose-built for each customers’ specific application.

CRG uses the latest CNC technology to fabricate gaskets from compressed non-asbestos sheet, ensuring exacting specifications and tight tolerances. Our material experts can provide assistance to ensure that the right material is chosen for your application.

At CRG, we serve customers who require gaskets for both OEM and MRO service. No order is too small or large, and we can provide expedited or emergency service upon request. To find out more about the gaskets from compressed non-asbestos sheet we can supply, please contact our sales team at crg@canadarubbergroup.com.

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