蝶阀又叫翻板阀，是一种结构简单的调节阀，可用于低压管道介质的开关控制的蝶阀是指关闭件（阀瓣或蝶板）为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀。阀门可用于控制空气、水、蒸汽、各种腐蚀性介质、泥浆、油品、液态金属和放射性介质等各种类型流体的流动。在管道上主要起切断和节流作用。蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的目的。

　　Butterfly valve, also known as flap valve, is a type of regulating valve with a simple structure that can be used for on/off control of low-pressure pipeline media. Butterfly valve refers to a valve whose closing element (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. It mainly plays a role in cutting off and throttling on pipelines. The butterfly valve opening and closing component is a disc-shaped butterfly plate that rotates around its own axis inside the valve body to achieve the purpose of opening, closing, or adjusting.

　　蝶阀产业链上游以原材料供应为核心，涵盖钢材、不锈钢、合金、密封材料及执行器配件等。中游为制造环节，包括阀体铸造/机加工、蝶板成型、密封件装配、总装调试及性能检测，部分企业聚焦三偏心结构、硬密封技术等高附加值产品。下游应用覆盖化工、石油、水处理、电力、冶金、食品制药等行业，涉及管道系统、流体控制工程及自动化控制系统集成。全球能源需求持续增长，能源行业发展势头强劲，但更为显著的是能源结构正在经历一场深刻的转型。电气化与数字化正逐渐成为能源转型的核心驱动力。

　　The upstream of the butterfly valve industry chain focuses on raw material supply, covering steel, stainless steel, alloys, sealing materials, and actuator accessories. The midstream is the manufacturing process, including valve body casting/machining, butterfly plate forming, seal assembly, final assembly debugging, and performance testing. Some enterprises focus on high value-added products such as triple eccentric structures and hard sealing technology. Downstream applications cover industries such as chemical, petroleum, water treatment, power, metallurgy, food and pharmaceuticals, involving pipeline systems, fluid control engineering, and automation control system integration. The global energy demand continues to grow, and the energy industry has a strong development momentum, but more significantly, the energy structure is undergoing a profound transformation. Electrification and digitization are gradually becoming the core driving forces of energy transformation.

　　蝶阀作为能源开采、生产、传输和储存过程中不可或缺的关键设备，其技术和生产工艺的进步对能源行业的转型升级起到了至关重要的作用。据统计2024年全球蝶阀市场规模达到了113.4亿美元，2020-2024年CAGR约为4.9%。低端阀门及民用阀门市场的阀门产品需求量大，技术含量低，进入门槛不高，充斥大量家庭式、作坊式小阀门生产企业，市场竞争程度最高，利润水平较低。中端阀门市场需求量大，需要达到工业级质量要求，技术含量较高，且终端客户普遍设定合格供应商资格，我国阀门行业大型企业已经在中端市场占有较重要的地位。

　　Butterfly valves, as essential key equipment in energy extraction, production, transmission, and storage processes, have played a crucial role in the transformation and upgrading of the energy industry with the advancement of their technology and production processes. According to statistics, the global butterfly valve market size reached 11.34 billion US dollars in 2024, with a CAGR of approximately 4.9% from 2020 to 2024. The demand for valve products in the low-end valve and civilian valve market is high, with low technical content and low entry barriers. It is filled with a large number of family and workshop style small valve production enterprises, with the highest degree of market competition and low profit levels. The mid-range valve market has a large demand, requiring industrial grade quality requirements, high technical content, and generally qualified supplier qualifications set by end customers. Large enterprises in China's valve industry have already occupied an important position in the mid-range market.

　　阀是用圆形蝶板作启闭件并随阀杆转动来开启、关闭和调节流体通道的一种阀门，蝶阀的蝶板安装于管道的直径方向。在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则为全开状态。

　　A valve is a type of valve that uses a circular butterfly plate as the opening and closing member and rotates with the valve stem to open, close, and regulate fluid channels. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis at an angle between 0 ° and 90 °. When it rotates to 90 °, the valve is fully open.

　　施工安装要点

　　Key points of construction and installation

　　1、安装位置、高度、进出口方向必须符合设计要求，连接应牢固紧密。

　　1. The installation position, height, and import/export direction must meet the design requirements, and the connection should be firm and tight.

　　2、安装在保温管道上的各类手动阀门，手柄均不得向下。

　　2. All types of manual valves installed on insulated pipelines must not have handles facing downwards.

　　3、阀门安装前必须进行外观检查，阀门的铭牌应符合现行国家标准《通用阀门标志》GB 12220的规定。对于工作压力大于1.0 MPa 及在主干管上起到切断作用的阀门，安装前应进行强度和严密性能试验，合格后方准使用。强度试验时，试验压力为公称压力的1.5倍，持续时间不少于5min，阀门壳体、填料应无渗漏为合格。严密性试验时，试验压力为公称压力的1.1倍；试验压力在试验持续的时间应符合GB 50243标准要求，以阀瓣密封面无渗漏为合格。产品选用要点1、蝶阀主要控制参数为规格尺寸。2、蝶阀为单板式风阀，其结构简单、加工方便、价格低廉、操作简便，但调节精度较差，仅适用于通风与空调系统中作开关或粗调节的场合。3、可手动、电动或拉链式操作，可90°范围任意角度固定。

　　3. Before installing the valve, a visual inspection must be conducted, and the valve nameplate should comply with the current national standard "General Valve Marking" GB 12220. For valves with a working pressure greater than 1.0 MPa and a shut-off function on the main pipeline, strength and tightness tests should be conducted before installation, and they can only be used after passing the tests. During the strength test, the test pressure shall be 1.5 times the nominal pressure, and the duration shall not be less than 5 minutes. The valve shell and packing shall be qualified if there is no leakage. During the tightness test, the test pressure is 1.1 times the nominal pressure; The test pressure should meet the requirements of GB 50243 standard for the duration of the test, and it is considered qualified if there is no leakage on the sealing surface of the valve disc. Key points for product selection: 1. The main control parameters for butterfly valves are specifications and dimensions. 2. Butterfly valve is a single plate air valve with a simple structure, easy processing, low price, and easy operation. However, its adjustment accuracy is poor, and it is only suitable for use as a switch or rough adjustment in ventilation and air conditioning systems. 3. It can be operated manually, electrically, or zippered, and can be fixed at any angle within a 90 ° range.

　　4、由于单轴单阀板，承受力有限，在大压差、大流速条件下时，阀门使用寿命短。

　　4. Due to the limited load-bearing capacity of the single axis single valve plate, the service life of the valve is short under conditions of large pressure difference and high flow rate.

　　5、电动式蝶阀仅有双位式控制，电动执行机构与多叶阀相同。

　　5. Electric butterfly valves only have dual position control, and the electric actuator is the same as multi leaf valves.

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