蝶阀是一种常见的工业管道控制设备，主要用于控制管道中介质的流量、压力和方向。以下是蝶阀的主要作用和特点：

　　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:

　　调节流量 ：通过蝶板的开度调节管道中介质的流量。

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

　　调节压力 ：蝶板关闭度增加时，限制管道中的流量，从而控制介质压力。

　　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.

　　防止反向流动 ：蝶阀能自动关闭，避免介质反向流动，保护管道系统。

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

　　转换流动方向 ：改变蝶板位置，改变介质流动方向。

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

　　特点：

　　characteristic:

　　结构简单 ：蝶阀由圆盘形的蝶板围绕阀轴旋转启闭，结构紧凑，体积小。

　　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.

　　操作灵活 ：蝶板旋转90°即可完成启闭，启闭方便迅速，适合大口径管道。

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

　　流体阻力小 ：全开时，阀座通道有效流通面积较大，流体阻力小。

　　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 ：蝶阀采用金属环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.

　　适应性强 ：蝶阀可用于不同温度、压力和腐蚀性介质，以及含悬浮固体颗粒的介质。

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

　　驱动方式多样 ：蝶阀的驱动形式包括手动、蜗轮传动、电动、气动、液动、电液联动等。

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

　　维护方便 ：蝶阀结构简单，易于维护和更换密封件。

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

　　适用范围广 ：蝶阀广泛应用于化工、石油、天然气、食品加工、医药、水处理等行业。

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

　　蝶阀的设计使其在开启和关闭时具有较小的流体阻力，并且可以在开启到大约15°~70°时进行灵活的流量控制。此外，蝶阀的蝶板运动带有擦拭性，使其适用于带悬浮固体颗粒的介质，依据密封件的强度也可用于粉状和颗粒状的介质。蝶阀的密封圈材料一般采用橡胶、塑料，但使用工作温度较低；如采用金属或其他耐高温材料制作密封面，则可用于高温。蝶阀的适用温度和压力范围较广，能够满足不同工业应用的需求。

　　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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