Metal winding gasket is a sealing element is important, is widely used in petroleum, chemical,metallurgy, electric power, shipbuilding and other industries, is the current Chinese pressure piping, valves, pumps, heat exchangers and other equipment for static sealing parts. So theselection and use of high-quality metal winding gasket products, to reduce and eliminate run,take, drop, leakage, ensure the safety of pressure pipelines, mainframe equipment in normal operation, has the very vital significance
A，choose metal spiral wound gasket products should pay attention to the following points:
1, according to the selection of gasket sealing surface conditions, flange.
2, metal winding gasket body surface are not allowed to have scars, voids, rugged and rustdefects affect the sealing performance. Metal gasket. The surface of the body of non metal beltshould be uniform, moderate to high metal band, interlayer texture should be clear, but notexposed metal belt. Metal spiral wound gasket spot spacing should be uniform, there should be no lack of fusion or welding defects. Reinforcing ring surface should not have burrs, rough, rust and other defects, metal gasket. The main body of the sealing surface and the reinforcement ring on the lower surface spacing should be equal to strengthen ring and gasket between the main body should be tightly fixed, not loose; with stiffening ring and gasket between the main body should keep proper positioning and loose.
3, Metal spiral wound gasket compression ratio, and the sealing performance is an importantperformance index, the gasket in general, the compression ratio of the requirements of the premise, the rebound rate is higher; and in order to meet the standard requirements of therebound rate, compression ratio of the test value is bigger is better. Gasket should choose good sealing performance, compression rate is modest and resilience rate is as large as possibleproducts metal winding