The pneumatic three-eccentric butterfly valve is another type of butterfly valve. It adopts a three-eccentric structure design and combines the pneumatic actuator to achieve fast, low friction operations. So what are the structure, working principle and advantages and characteristics of pneumatic three-eccentric butterfly valves?
Structure and working principle of pneumatic three-eccentric butterfly valve:
The core of the pneumatic three-eccentric butterfly valve is its three independent eccentric structures, namely axis deviation, disc center deviation and seal surface deviation. This design means that during the valve opening and closing, the disc plate will not directly contact the valve seat, but will move along a specific trajectory, reducing wear and friction, greatly enhancing sealing performance and performance.
Axial deviation: refers to the distance between the center of the butterfly plate and the valve axis, ensuring that the disc plate does not collide with the valve seat when it rotates.
Displacement center deviation: There is a slight deviation between the center of the butterfly plate and the center of the valve body, optimizing the stress distribution.
Seal surface deviation: The seal surface is conical or spherical, and there is a preload force between it and the disc plate to enhance the sealing effect.
Features and advantages of pneumatic three-eccentric butterfly valve:
High sealing: Thanks to the precise three-eccentric structure, zero leakage can be guaranteed even under high pressure differences.
Low torque operation: reduce friction, making the valve easy to drive and saves energy consumption.
Self-cleaning function: The flowing medium can automatically remove accumulated materials and keep the channels open.
Wide applicability: It can deal with various media, including high temperature, low temperature, corrosive, viscous liquid and even solid particles.
Convenient maintenance: simple structure, easy to disassemble and repair.
Pneumatic three-eccentric butterfly valves are used in strict industrial process control environments, such as petroleum, chemical, papermaking, sewage treatment and other industries. Its excellent sealing and long life are widely praised by the industry.
