Butterfly valve is a commonly used valve for controlling fluid flow, which controls the flow rate of the medium by rotating a disc. According to its structure and function, butterfly valves can be divided into the following types:

集中密封蝶阀（Concentric Butterfly Valve）：

Centralized Butterfly Valve:

结构特点：集中密封蝶阀的圆盘位于阀座，圆盘上有一个轴向孔，形成类似于蝴蝶的结构。

Structural features: The disc of the centralized sealing butterfly valve is located in the center of the valve seat, and there is an axial hole on the disc, forming a structure similar to that of a butterfly.

作用：通过旋转圆盘来调节流体的流量，可用于截断和调节介质的流量。

Function: By rotating the disk to regulate the flow rate of the fluid, it can be used to cut off and regulate the flow rate of the medium.

偏心蝶阀（Eccentric Butterfly Valve）：

Eccentric Butterfly Valve:

结构特点：偏心蝶阀的圆盘位于阀座偏离的位置，形成偏心结构。

Structural features: The disc of the eccentric butterfly valve is located at a position that deviates from the center of the valve seat, forming an eccentric structure.

作用：通过旋转圆盘来控制介质的流量，具有较好的密封性能和耐磨性，常用于高压、高温或具有腐蚀性介质的工况。

Function: Control the flow rate of the medium by rotating the disc, with good sealing performance and wear resistance, commonly used in high-pressure, high-temperature or corrosive media conditions.

双偏心蝶阀（Double Eccentric Butterfly Valve）：

Double Eccentric Butterfly Valve:

结构特点：双偏心蝶阀的圆盘和阀杆都偏离阀座，形成双偏心结构。

Structural features: The disc and valve stem of the double eccentric butterfly valve are deviated from the center of the valve seat, forming a double eccentric structure.

作用：通过旋转圆盘来控制流体的流量，具有更好的密封性和耐磨性，适用于高压、高温、高流速或具有腐蚀性介质的工况。

Function: Control the flow of fluid by rotating the disc, providing better sealing and wear resistance, suitable for working conditions with high pressure, high temperature, high flow rate, or corrosive media.

三偏心蝶阀（Triple Eccentric Butterfly Valve）：

Triple Eccentric Butterfly Valve:

结构特点：三偏心蝶阀的圆盘和阀杆都偏离阀座，并且圆盘的旋转轴线与阀座轴线不重合。

Structural features: The disc and valve stem of the triple eccentric butterfly valve are both offset from the center of the valve seat, and the rotation axis of the disc does not coincide with the center axis of the valve seat.

作用：通过旋转圆盘来控制流体的流量，具有优异的密封性能和耐磨性，常用于高温、高压、高速或具有腐蚀性介质的工况。

Function: Control the flow of fluid by rotating the disc, with excellent sealing performance and wear resistance, commonly used in high-temperature, high-pressure, high-speed or corrosive media conditions.

蝶阀的主要作用是控制流体介质的流量，通过旋转圆盘的角度来调节阀门的开度，实现介质的截断或调节。蝶阀广泛应用于各种工业领域，如化工、石油、天然气、供水、排水、空调、食品等。

The main function of a butterfly valve is to control the flow rate of the fluid medium, adjust the opening of the valve by rotating the angle of the disc, and achieve the cutoff or adjustment of the medium. Butterfly valves are widely used in various industrial fields, such as chemical, petroleum, natural gas, water supply, drainage, air conditioning, food, etc.

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Thank you for reading. The source of this article is Lianggong Valve Agency. For more information and questions, please click on: http://www.jnlgvf.com We will continue to work hard to provide you with services. Thank you for your support!