蝶閥是一種常見的工業管道控制設備，主要用于控制管道中介質的流量、壓力和方向。以下是蝶閥的主要作用和特點：

　　Butterfly valve is a common industrial pipeline control equipment, mainly used to control the flow rate, pressure, and direction of the medium in the pipeline. The following are the main functions and characteristics of butterfly valves:

　　主要作用：

　　Main function:

　　調節流量 ：通過蝶板的開度調節管道中介質的流量。

　　Adjust flow rate: Adjust the flow rate of the medium in the pipeline through the opening of the butterfly plate.

　　調節壓力 ：蝶板關閉度增加時，限制管道中的流量，從而控制介質壓力。

　　Adjust pressure: When the closure degree of the butterfly plate increases, it restricts the flow rate in the pipeline, thereby controlling the pressure of the medium.

　　防止反向流動 ：蝶閥能自動關閉，避免介質反向流動，保護管道系統。

　　Prevent reverse flow: Butterfly valves can automatically close to prevent reverse flow of the medium and protect the pipeline system.

　　轉換流動方向 ：改變蝶板位置，改變介質流動方向。

　　Change flow direction: change the position of the butterfly plate and alter the direction of medium flow.

　　特點：

　　characteristic:

　　結構簡單 ：蝶閥由圓盤形的蝶板圍繞閥軸旋轉啟閉，結構緊湊，體積小。

　　Simple structure: The butterfly valve is opened and closed by a disc-shaped butterfly plate rotating around the valve shaft, with a compact structure and small volume.

　　操作靈活 ：蝶板旋轉90°即可完成啟閉，啟閉方便迅速，適合大口徑管道。

　　Flexible operation: The butterfly plate can be opened and closed by rotating 90 °, which is convenient and fast, suitable for large-diameter pipelines.

　　流體阻力小 ：全開時，閥座通道有效流通面積較大，流體阻力小。

　　Low fluid resistance: When fully open, the effective flow area of the valve seat channel is large, resulting in low fluid resistance.

　　密封性好 ：蝶閥采用金屬環或聚四氟乙烯等密封材料，具有良好的密封性能。

　　Good sealing performance: Butterfly valves use sealing materials such as metal rings or polytetrafluoroethylene, which have good sealing performance.

　　適應性強 ：蝶閥可用于不同溫度、壓力和腐蝕性介質，以及含懸浮固體顆粒的介質。

　　Strong adaptability: Butterfly valves can be used for different temperatures, pressures, corrosive media, as well as media containing suspended solid particles.

　　驅動方式多樣 ：蝶閥的驅動形式包括手動、蝸輪傳動、電動、氣動、液動、電液聯動等。

　　There are various driving methods: the driving forms of butterfly valves include manual, worm gear transmission, electric, pneumatic, hydraulic, electro-hydraulic linkage, etc.

　　維護方便 ：蝶閥結構簡單，易于維護和更換密封件。

　　Easy maintenance: The butterfly valve has a simple structure and is easy to maintain and replace seals.

　　適用范圍廣 ：蝶閥廣泛應用于化工、石油、天然氣、食品加工、醫藥、水處理等行業。

　　Wide applicability: Butterfly valves are widely used in industries such as chemical, petroleum, natural gas, food processing, pharmaceuticals, and water treatment.

　　蝶閥的設計使其在開啟和關閉時具有較小的流體阻力，并且可以在開啟到大約15°~70°時進行靈活的流量控制。此外，蝶閥的蝶板運動帶有擦拭性，使其適用于帶懸浮固體顆粒的介質，依據密封件的強度也可用于粉狀和顆粒狀的介質。蝶閥的密封圈材料一般采用橡膠、塑料，但使用工作溫度較低；如采用金屬或其他耐高溫材料制作密封面，則可用于高溫。蝶閥的適用溫度和壓力范圍較廣，能夠滿足不同工業應用的需求。

　　The design of butterfly valves provides minimal fluid resistance during opening and closing, and allows for flexible flow control when opening to approximately 15 °~70 °. In addition, the butterfly valve's disc movement has wiping properties, making it suitable for media with suspended solid particles. Depending on the strength of the seal, it can also be used for powder and granular media. The sealing ring material of butterfly valves is generally made of rubber or plastic, but the operating temperature is relatively low; If metal or other high-temperature resistant materials are used to make the sealing surface, it can be used for high temperatures. Butterfly valves have a wide range of applicable temperatures and pressures, which can meet the needs of different industrial applications.

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