Eccentric hemispherical valve is a multi-functional fluid control equipment, which is widely used in petroleum, chemical, electric power, metallurgy, pharmaceutical, food and other industries, with the following multiple purposes:
In the petroleum and chemical industry, eccentric hemisphere valves are usually used to cut off or connect the medium in the pipeline, and can also be used for fluid regulation and control. The eccentric hemisphere valve is used for the control of high viscosity medium, medium containing solid particles, medium easy to crystallize, precipitate and solidify. The eccentric hemisphere valve has good self-cleaning and anti blocking performance, and is suitable for liquid and medium containing solid particles. Equipped with multi rotation electric actuator, it can adjust the medium and cut off tightly, and is widely used in urban water supply and drainage and other working conditions requiring strict cutting off.
Features of eccentric hemisphere valve
1. The eccentric rotation design of the valve clack makes the valve more tightly closed, which can realize two-way sealing and sealing surface wear compensation;
2. The eccentric design of the valve disc enables the valve disc surface and the valve seat to quickly separate and close when opening and closing, reducing wear and opening and closing torque;
3. After the valve is fully opened, the valve disc is located at the side of the valve chamber, reducing the medium scouring and flow resistance;
4. During horizontal installation, no sundries will be deposited at the lower part of the valve chamber;
5. The sealing surface is hardfacing, and the inner chamber and valve clack can be sprayed with wear-resistant layer;
6. Simple structure, quick opening and closing.
Large diameter eccentric hemispherical valve is a kind of valve that uses ball and valve seat to cooperate with each other. Its working principle is to control the flow of medium by rotating the sphere. When the valve is closed, the ball and the valve seat closely fit to prevent the medium flow. When the valve is in the open state, the ball rotates to a certain angle, so that the medium flows through the gap between the ball and the valve seat. There is a certain eccentric distance between the ball of the eccentric hemisphere valve and the valve seat, which enables the ball to produce an eccentric force when rotating, thus pressing the ball tightly on the valve seat, forming a better sealing effect. At the same time, because the ball can be fully opened and closed only by rotating a certain angle, the large diameter eccentric hemisphere valve has the characteristics of fast opening and closing, convenient operation, etc.
The eccentric hemisphere valve of soda ash adopts the eccentric structure, which can be adjusted and cut off through the transmission mechanism. The whole series of eccentric hemisphere valves of soda ash adopt the fixed ball structure. When the eccentric valve is opened, the valve core is located in the ball chamber, the flow section is large, and the valve core is not easy to be washed; When closing, the spherical surface of the valve core gradually approaches the valve seat, which can effectively remove the phenomena such as scaling, crystallization and scaling, and achieve reliable sealing. The soda ash eccentric hemisphere valve is resistant to chloride corrosion and ammonia corrosion. It is a new generation of ball valve in the soda ash industry for applications such as scarring, scaling, crystallization and scouring.
Side mounted eccentric hemisphere valves are widely used in petroleum, chemical industry, metallurgy, electric power, pharmacy, paper making, papermaking, sewage treatment, municipal engineering and other fields, mainly used to regulate and cut off the flow and pressure of media. It is characterized by compact structure, good sealing, small flow resistance, flexible operation, strong corrosion resistance, long service life, etc. In chemical, petroleum, pharmaceutical and other industries, side mounted eccentric hemisphere valves are often used to transport corrosive media and high-temperature, high-pressure media. In municipal engineering, side mounted eccentric hemisphere valves are often used in sewage treatment systems and drainage pipelines.
Side mounted eccentric hemisphere valve is a new type of valve product, which has been widely used in petroleum, chemical, electric power, metallurgy and other industries. In the future, the development trend of side mounted eccentric hemisphere valve mainly includes the following aspects: further improvement of high temperature, high pressure and corrosion resistance. With the need of industrial development, the use conditions of side mounted eccentric hemisphere valves are becoming more and more stringent, requiring higher temperature, pressure and corrosion resistance. The improvement of intelligence and automation. With the continuous improvement of industrial automation, the side mounted eccentric hemisphere valve also needs to have a higher degree of intelligence and automation to meet the needs of industrial production. Diversification of materials. The materials of side mounted eccentric hemisphere valve mainly include stainless steel, carbon steel, alloy steel, etc. In the future, with the development and application of new materials, the materials of side mounted eccentric hemisphere valve will be more diversified.
