Views:82 Author:Site Editor Publish Time: 2020-01-02 Origin:Site
The butterfly valve is also called a flap valve. It is a simple structured regulating valve. It can be used for low-pressure pipeline medium switch control. The butterfly valve is a valve with a disc that rotates around the valve shaft to achieve opening and closing. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, muds, oils, liquid metals and radioactive media. It mainly plays a role of cutting off and throttling on the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting.
In the 1930s, the United States invented the butterfly valve, and it was introduced to Japan in the 1950s. It was generally adopted in Japan in the 1960s, and it was introduced in China after the 1970s.
The main features of butterfly valves are small operating torque, small installation space and light weight. The butterfly valve is easy to combine with various driving devices, and has good durability and reliability. The disadvantage of the rubber seal butterfly valve is that when it is used for throttling, it will cause cavitation due to improper use, which will cause the rubber seat to peel off and damage. Therefore, how to properly select it depends on the working conditions. The relationship between the opening degree of the butterfly valve and the flow rate basically changes linearly.
The valve industry plays a very important role in the development of the national economy as an important link in the equipment manufacturing industry. Due to the gap between China's domestic valve manufacturing level and the international advanced level, many key valves with high parameters, high temperature, high pressure and high pounds have always depended on imports. For example, the European OMAL brand has always been the main choice for domestic valve application industries. In order to promote the localization of valves, after the State Council issued "Several Opinions on Accelerating the Revitalization of the Equipment Manufacturing Industry", the relevant state departments have made a series of major deployments in accordance with the state's requirements for major equipment localization. Led by the National Development and Reform Commission, the China Machinery Industry Federation and the China General Machinery Industry Association have jointly formulated and formulated valve localization plans for major equipment in related fields, and coordinated with relevant departments on many occasions. Today, the localization of valves in the domestic valve industry has reached a consensus. With the acceleration of the restructuring of the valve industry, the future industry will be the competition between the quality and safety of valve products and the brand. The products will develop in the direction of high technology, high parameters, strong corrosion resistance, and long life. Only when the product undergoes technical transformation can it gradually improve the product technology level, meet domestic equipment matching, and fully realize the domestic production of valves. China's valve manufacturing industry will present a better development prospect under the huge demand environment.