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Fully welded ball valves are widely used in main pipelines for urban gas: in gas delivery pipelines, main lines, and various branch pipelines. Centralized heating: Large-scale heating systems consist of output pipelines, main lines, and branch lines. Heat exchanger: Opening and closing of pipes and various circuits. Steel plant: various fluid pipelines, exhaust gas emission pipelines, pipelines for supplying gas and heat, and fuel supply pipelines. Various industrial installations: various heat treatment pipelines, various industrial gas and heat pipelines. At the same time, it is also referred to in the industry or by users as natural gas ball valve, gas ball valve, and various other names. Ball valve characteristics: Fully welded ball valve, with no signs of external leakage. The processing of spheres is monitored by advanced computer detectors, which ensures high precision in their fabrication. Since the valve body is made of the same material as the pipeline, there is no uneven stress, and it will not deform due to earthquakes or vehicles passing over the ground; therefore, the pipeline is resistant to aging. The seal ring body is made of RPTFE containing 25% carbon, ensuring complete leak prevention (0%). Fully Welded Ball Valve-1.jpg Large-Diameter Fully Welded Ball Valve-2.jpg Buried Welded Ball Valves can be directly buried underground; there is no need to construct large valve chambers. Instead, small shallow wells can be dug on the surface, **which saves on construction costs and time. The length of the valve body and the height of the valve stem can be adjusted according to the construction and design requirements of the pipeline. The processing precision of the sphere is extremely high; it is easy to operate, with no adverse interferences. Using high-grade raw materials ensures a pressure rating of PN25 or higher. Compared to products of the same specification in other similar industries, it has a smaller valve body and an attractive appearance. Under conditions that ensure the proper operation of the valve, its service life is over 15 years. Welding process of fully welded ball valves: 1. During the welding of fully welded ball valves, the workpiece and solder melt to form a molten zone; once this molten pool cools and solidifies, a connection between the materials is established. 2. In this process, pressure is usually also required to be applied. There are many sources of energy for welding, including gas flames, arcs, lasers, electron beams, friction, and ultrasonic waves. 3. Before the end of the 19th century, the only welding technique was metal forging, a method used by blacksmiths for hundreds of years. 4. The earliest ancient welding techniques appeared at the end of the 19th century, first arc welding and oxy-acetylene welding, followed later by resistance welding. 5. In the late 20th century, with the end of World War I and World War II, there was a great demand for inexpensive and reliable methods of joining military materials, which thus promoted the development of welding technology. 6. Tomorrow, as welding robots become more widely used in industry, researchers will continue to delve deeper into the fundamentals of welding and develop new welding methods in order to further improve welding quality. Features of buried fully welded ball valves: The design characteristics of buried fully welded ball valves include integral full welding, constant-diameter or variable-diameter channels, the use of fixed balls and floating balls, a double-piston mechanism for sealing, long valve stems and long valve bodies, as well as long valve stems and short valve bodies, with direct burial. 1) Since the body of the buried fully welded ball valve is of welded construction, the valve is lightweight and easy to insulate. 2) The sealing provided by the spring-loaded PTFE ball ensures relative tightness under all operating conditions. 3) Both the ball and the stem of the buried fully welded ball valve are made of stainless steel; it features a stem design with two O-rings to prevent the stem from escaping. This anti-escape mechanism consists of a step at the lower part of the stem, allowing the stem to be inserted from the outside of the valve body, thereby preventing it from coming out. To ensure its tightness, the upper container can be replaced, resulting in a long service life. 4)：Buried fully welded ball valves are available in welded, threaded, and flanged connection types. 5)：It holds ISO 9001 certification. 6)：Steel ball valves are used in applications such as heating and cooling systems, as well as in pressure gas and oil pipelines. 7): Anti-static energy: The installation of anti-static springs between the sphere and the valve body or valve stem allows the static electricity generated during the switching process to be discharged.