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2013年8月2日星期五

Gaskets and Seals

Gaskets and Seals are generally used toSpiral Wound Gaskets seal two or more surfaces together. Gaskets and seals are placed between specific surfaces to prevent the leakage of either gases or fluids. These seals are generally manufactured from a flexible material such as rubber or even cork. The gasket or seal is placed between the appropriate surfaces, and the surfaces are then brought together and tightened by various mechanisms. This has the effect of putting pressure on the gasket or seal which responds by sealing the two surfaces together, thus preventing leakage from the joint.

Gaskets are are used in many industries such as, mechanical engineering, aerospace, automotive and the plumbing industry. They are available for many kinds of sealing applications, and these can include, pipe washers, engine gaskets and washing machine etc. Many gaskets are commonly manufactured by cutting from sheet materials such as:

Fibreglass
Paper
Rubber
Cork & Felt
Metal
Plastic polymers
Some gaskets which are made for specific Metal Jacketed Gasketspurpose are even made from asbestos. Gaskets need to be manufactured from a material that has yielding and deforming qualities, so that they can tightly fill the space and seal any small irregularities. Most gaskets need to have some form of sealant applied to their surface to enable the gasket to work properly. Gaskets need to be able to handle high compressive loads and fibre gaskets are extremely effective for this purpose, and the more compressive load exerted onto the gasket, the longer the life of the gasket. Gaskets need to be manufactured to high standards, and there are several ways to test the compression qualities of the materials used. The 'hot compression test' is an extremely efficient method of testing for these qualities, and most manufactures will publish and provide the results of these tests. There are several different types of gaskets for various applications and these can include:

Sheet gaskets: gaskets are cut out of a sheet of material such as graphite etc.
Solid material gaskets: made from metal and can withstand high temperatures and pressures.
Spiral wound jackets: made from a metallic and filler material.
Double jacketed gaskets: made from metallic and filler materials.
Kammprofile gaskets: gaskets have a corrugated core with a flexible covering layer.
If you are in need of this service check out our product pages, they contain many companies that specialise in this. John Cheesman writes about Gaskets and Seals. Visit the Businessmagnet product page for details Reinforced Graphite Gasket and suppliers of Gaskets and Seals.

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