The domestic metal stamping mold industry is continuously catching up with the world advanced level, and continuously narrowing the technological gap with developed countries. Many domestic precision stamping molds are comparable to imported products in terms of main performance, and the overall level of the industry has been significantly improved, not only import substitution, but also A considerable part of the production is exported to the United States, Japan and other industrialized countries and regions. At present, China's precision stamping dies are actively going to the international stage and participating in international competition.
Although there is still a certain gap between the developed countries and the developed countries, according to the current development of the domestic industry, in the next few years, the domestic stamping mold industry will surely catch up and become the backbone of the development of the domestic mold industry, improve the industry's overall level of technology, promote The domestic mold industry is moving toward high-end, precision, large-scale, and complex development. And require mold manufacturing technology can better reflect the information, digital, fine, high-speed, and automation. The backbone of the industry will continue to expand, and will play an increasingly important role in the industry. The public information service platform will be developed faster, and its various service functions and the promotion of the productivity of the majority of SMEs will also be More apparent.
Ball valve is evolved from the plug valve, its opening and closing parts as a ball, using the ball to rotate 90 degrees around the axis of the stem to achieve the purpose of opening and closing, the difference is that the cock body is a ball, with a circular through hole or channel through its axis. The ratio of the sphere to the passageway should be such that when the ball is rotated 90 degrees, the inlet and outlet should be completely spherical, thus cutting off the flow.
The role of ball valve in the pipeline is mainly used to cut off, distribute and change the direction of media flow, designed into the V-shaped opening ball valve also has good flow regulation function.
Ball valve is not only simple in structure, good sealing performance, but also in a certain nominal range of small volume, light weight, less material consumption, small installation size, and driving torque is small, easy to operate, easy to realize rapid opening and closing, is one of the fastest developing valve varieties in recent decades. Especially in the United States, Japan, Germany, France, Italy, West, Britain and other industrial developed countries, ball valves are widely used, the variety and number of use is still continuing to expand, and to high temperature, high pressure, large mouth, high sealing, long life, excellent regulatory performance and a valve multifunctional direction, its reliability and other performance indicators have reached a higher level, And has partially replaced Gate Valve, Globe Valve, Regulating Valve.
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