Two general points sealing industry, that seals and static seals, I am speaking here mainly refers to the static seal. As we all know, in our country, the sealing industry is the smallest of the industry can be said, but the product is complete with large-scale industrial use. Whether aviation, marine, petroleum, chemical, or mechanical, power generation, metallurgy, mining, etc., are inseparable from the seals. In short, all organic, pumps, pipe, valve parts, are dependent on seals. So the industry is small, involving the surface is very wide.

    In recent years, along with economic development, development of the industry quickly sealed. However, different from other industries, the sealing industry, although fast, sealed companies are slowly changing. Such as the late 70s early 80s, only in Jiangsu, Zhejiang, Shandong and there are a few manufacturers, and now both the coastal areas, the Mainland, or the South, North, everywhere Factory sealed, the sealing industry has been the previous few, 300 development to the present as much as it can be said that the pace of development is very fast out. But in terms of individual enterprises, many enterprises changed little, the scale of production before the roundabout is not, or even reversed, there are no major technological power has not only increased, and some the contrary, weakened, many manufacturers still have the "four old" hold that the old products, old technology, old equipment, old scale. Of course, there are some companies, generic copy ability of some products, but in the industry capable of developing new capabilities in the enterprise does not have much.

    On the product concerned, most manufacturers still a number of spiral wound gaskets, packing ring, packing, and high-strength gaskets and other old products, but still around 20 years ago and the development of expanded graphite and close out the old, disabled asbestos fuss , rarely out of the circle. PTFE slightly innovative products, technology and quality far behind other countries, such as PTFE packing, Expanded PTFE tape. Looking around, very few new products.

    In terms of technical strength, most enterprises smaller proportion of scientists, many enterprises lack the genuine technical education of technical staff, technology is weak, so businesses on the lack of appropriate development and transformation capabilities. Such as PTFE packing, start copy, the only added in the PTFE packing only. Now basically solved the problem of color uniformity, but the connection between the PTFE polymer problems have not been fundamentally resolved. Because of this process goes without treatment, resulting in poor tensile strength of PTFE made present. But to solve this problem, there is no certain foundation is very difficult. As high-strength graphite composite plate, in the thorn-shaped has been greatly improved, connection problems have been a better solution, but the anti-sticky issues remain unresolved, no production of low sulfur corrosion products, and more meaningful over low leakage rate of the product does not smell someone study. Since its inception the European Union, the United brings a strong, prompting the EU to improve and establish new quality standards for European seal, replacing the previous dependent on the U.S. fluid Association to develop a series of standards. Sealed in the new European quality standards and emphasized the leak rate occur. The leakage rate of our products are usually in the 10-1mg / s level, while the leakage rate in Europe there have been 10-4mg / s-class high-strength graphite composite plate!