The double eccentric butterfly valve, also known as high-performance butterfly valve, is mainly used for drainage of water plants, power plants, steel plants, smelting, chemical industry, environmental facilities and other systems, especially for waterway pipelines, as a regulation and closure equipment.
Features of high performance butterfly valve
The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the stem axis is not only off the center of the butterfly plate, but also off the center of the body; The double eccentric effect enables the butterfly plate to quickly disengage from the valve seat after the valve is opened, greatly eliminating unnecessary excessive squeezing and scraping between the butterfly plate and the valve seat, reducing the opening resistance distance, reducing wear, and improving the service life of the valve seat; In addition, the use of metal seat for double eccentric butterfly valve can also improve the application of butterfly valve in high-temperature field.
Compared with the center line butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, has longer service life and good stability. Compared with other valves, the larger the diameter, the lighter the material, and the lower the cost.
High performance butterfly valve display
Installation and operation of pneumatic high-performance butterfly valve is the connection between high-performance butterfly valve and pneumatic actuator. Installation precautions: the valve is closed; In addition, when connecting the air cylinder and high-performance butterfly valve, pay attention to whether the connecting shaft of the butterfly valve matches the inner octagon at the connection of the air cylinder. If the dimensions are different, use the octagonal sleeve as a bushing to install it, and then tighten the fixing screws at the connection.
Pneumatic high-performance butterfly valve is the combination of cylinder and high-performance butterfly valve. Solenoid valve and limit switch can be added to accessories to realize remote control and automatic operation. It is widely used in petroleum, chemical industry, electric power, metallurgy, food, medicine, textile, paper making and other industries. The medium is gas, air, steam, water, sea water, oil and other industrial pipelines for regulating flow and cutting off the medium.