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Spiral wound gasket is an important sealing element


Spiral wound gasket is an important sealing element. Metal spiral wound gasket is widely used in petroleum, chemical, metallurgy, power generation, shipbuilding and other industries. It is the key component of static sealing of pressure pipes, valves, pumps, heat exchangers and other equipment. part. Therefore, the selection and use of high-quality spiral wound gasket products is of great significance to reduce and eliminate running, running, dripping and leaking, and to ensure the safety of the host equipment and the normal operation of the pressure pipeline.

Pay attention to the main points when purchasing spiral wound gasket products: choose sealing gaskets according to flange standards, working conditions, and flange sealing surface shape, choose products with material parameters, drawings and experimental reports, and the appearance of the main body of the sealing gasket is not allowed. Scratches, voids, unevenness and rust defects that affect sealing performance.

The non-metallic strip on the surface of the gasket body should be evenly and properly higher than the metal strip, and the interlayer texture should be clear, but the metal strip should not be exposed. The spacing between the solder joints of the metal wound gasket should be even, and there should be no defects such as under-fusion or over-melting. There should be no burrs, unevenness, rust spots and other defects on the surface of the reinforcement ring. The distance between the upper and lower sealing surfaces of the gasket body and the upper and lower surfaces of the reinforcement ring should be equal. The inner reinforcement ring and the gasket body should be tightly fixed and not loose.

The outer reinforcing ring and the main body of the sealing gasket should be positioned and properly loosened. The compression rate, rebound rate and sealing performance are important performance indicators of the sealing gasket. Generally speaking, under the premise of meeting the requirements of the compression rate, the The higher the rate, the better; and on the premise of meeting the requirements of the rebound rate specification, the test value of the compression rate is also better. Products with good sealing performance, moderate shrinkage and as large a rebound rate as possible should be selected.

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