Recommended by vacuum butterfly valve manufacturer
1, Zhejiang Yongjia Hualite Valve Co., Ltd. is located in Oubei Town, Wenzhou, which is known as the "hometown of China valves" in China. Founded in 1988, the company is a high-tech enterprise integrating design, development, production, sales and service. The company took the lead in establishing a CAD/CAM valve design center and a three-dimensional simulation manufacturing experimental design system, and passed the ISO900 1 international quality system certification. China Valve Association is a member enterprise.
2. Tianjin Hanlong Valve Co., Ltd.? Is a scientific and technological enterprise, specializing in the research and development, production and sales of electric actuators, electric valves and supporting products. The company authorized Continental Company (Hanlong Valve) to produce and sell in Tianjin. The company has a large production base of nearly 40,000 square meters, with a construction area of 28,000 square meters. The company has 230 employees and 65 technicians, including three production and processing workshops, a valve assembly workshop and an electrical assembly and debugging center. It has modern processing centers, numerical control machine tools, horizontal and vertical turning and milling machines, boring machines, grinders and testing equipment? 60? First, realize the intensive production management mode.
Working principle of vacuum butterfly valve
The butterfly valve is driven by the motor to drive the actuator, so that the disc can rotate freely within 90 degrees to achieve the purpose of opening and closing or adjusting the medium flow.
At present? As components to realize the opening and closing of pipeline system and flow control, fluorine-lined butterfly valves and rubber-lined butterfly valves have been widely used in petroleum, chemical industry, metallurgy, hydropower and other fields. In the known butterfly valve technology, the sealing form mostly adopts sealing structure, and the sealing material is rubber, PTFE and so on. Due to the limitation of structural characteristics, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance and wear resistance. At present, the more advanced butterfly valve is the triple eccentric metal hard seal butterfly valve. The valve body and the valve seat are connected parts, and the sealing surface of the valve seat is covered with heat-resistant and corrosion-resistant alloy materials. Compared with the traditional butterfly valve, this butterfly valve has the advantages of high temperature resistance, easy operation, no friction when opening and closing, compensation sealing with the increase of torque of transmission mechanism when closing, and improved sealing performance and service life of the butterfly valve.
The vacuum butterfly valve still has the following problems in use.
1, because the multilayer soft and hard laminated sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium washes its sealing surface, and the soft sealing band in the metal sheet interlayer is directly affected by washing.
2. Limited by structural conditions, this structure is not suitable for valves with a diameter below DN200, because the overall structure of the valve plate is too thick and the flow resistance is large.
3. Due to the principle of rubber-lined butterfly valve, the sealing between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to press the valve plate on the valve seat. In the forward flow state, the higher the medium pressure, the tighter the seal extrusion. When the medium in the flow channel flows reversely, with the increase of medium pressure, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the seal begins to leak.
Vacuum butterfly valves can be classified according to pressure and temperature. Different types of products can withstand different pressures and temperatures, and manufacturers also play a decisive role in quality. Bian Xiao has introduced so many vacuum butterfly valves today. I believe everyone has a certain understanding of vacuum butterfly valves. When choosing, you might as well consider these methods introduced by Bian Xiao. In fact, the function of vacuum butterfly valve is very great. I hope my introduction will be helpful to readers.
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