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:

集中密封蝶閥（Concentric Butterfly Valve）：

Centralized Butterfly Valve:

結構特點：集中密封蝶閥的圓盤位于閥座，圓盤上有一個軸向孔，形成類似于蝴蝶的結構。

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：通過旋轉圓盤來調節流體的流量，可用于截斷和調節介質的流量。

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.

偏心蝶閥（Eccentric Butterfly Valve）：

Eccentric Butterfly Valve:

結構特點：偏心蝶閥的圓盤位于閥座偏離的位置，形成偏心結構。

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：通過旋轉圓盤來控制介質的流量，具有較好的密封性能和耐磨性，常用于高壓、高溫或具有腐蝕性介質的工況。

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.

雙偏心蝶閥（Double Eccentric Butterfly Valve）：

Double Eccentric Butterfly Valve:

結構特點：雙偏心蝶閥的圓盤和閥桿都偏離閥座，形成雙偏心結構。

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：通過旋轉圓盤來控制流體的流量，具有更好的密封性和耐磨性，適用于高壓、高溫、高流速或具有腐蝕性介質的工況。

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.

三偏心蝶閥（Triple Eccentric Butterfly Valve）：

Triple Eccentric Butterfly Valve:

結構特點：三偏心蝶閥的圓盤和閥桿都偏離閥座，并且圓盤的旋轉軸線與閥座軸線不重合。

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：通過旋轉圓盤來控制流體的流量，具有優異的密封性能和耐磨性，常用于高溫、高壓、高速或具有腐蝕性介質的工況。

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.

蝶閥的主要作用是控制流體介質的流量，通過旋轉圓盤的角度來調節閥門的開度，實現介質的截斷或調節。蝶閥廣泛應用于各種工業領域，如化工、石油、天然氣、供水、排水、空調、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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