蝶閥又叫翻板閥，是一種結構簡單的調節閥，可用于低壓管道介質的開關控制的蝶閥是指關閉件（閥瓣或蝶板）為圓盤，圍繞閥軸旋轉來達到開啟與關閉的一種閥。閥門可用于控制空氣、水、蒸汽、各種腐蝕性介質、泥漿、油品、液態金屬和放射性介質等各種類型流體的流動。在管道上主要起切斷和節流作用。蝶閥啟閉件是一個圓盤形的蝶板，在閥體內繞其自身的軸線旋轉，從而達到啟閉或調節的目的。

　　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.

　　蝶閥產業鏈上游以原材料供應為核心，涵蓋鋼材、不銹鋼、合金、密封材料及執行器配件等。中游為制造環節，包括閥體鑄造/機加工、蝶板成型、密封件裝配、總裝調試及性能檢測，部分企業聚焦三偏心結構、硬密封技術等高附加值產品。下游應用覆蓋化工、石油、水處理、電力、冶金、食品制藥等行業，涉及管道系統、流體控制工程及自動化控制系統集成。全球能源需求持續增長，能源行業發展勢頭強勁，但更為顯著的是能源結構正在經歷一場深刻的轉型。電氣化與數字化正逐漸成為能源轉型的核心驅動力。

　　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.

　　蝶閥作為能源開采、生產、傳輸和儲存過程中不可或缺的關鍵設備，其技術和生產工藝的進步對能源行業的轉型升級起到了至關重要的作用。據統計2024年全球蝶閥市場規模達到了113.4億美元，2020-2024年CAGR約為4.9%。低端閥門及民用閥門市場的閥門產品需求量大，技術含量低，進入門檻不高，充斥大量家庭式、作坊式小閥門生產企業，市場競爭程度最高，利潤水平較低。中端閥門市場需求量大，需要達到工業級質量要求，技術含量較高，且終端客戶普遍設定合格供應商資格，我國閥門行業大型企業已經在中端市場占有較重要的地位。

　　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.

　　閥是用圓形蝶板作啟閉件并隨閥桿轉動來開啟、關閉和調節流體通道的一種閥門，蝶閥的蝶板安裝于管道的直徑方向。在蝶閥閥體圓柱形通道內，圓盤形蝶板繞著軸線旋轉，旋轉角度為0°~90°之間，旋轉到90°時，閥門則為全開狀態。

　　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.

　　施工安裝要點

　　Key points of construction and installation

　　1、安裝位置、高度、進出口方向必須符合設計要求，連接應牢固緊密。

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

　　2、安裝在保溫管道上的各類手動閥門，手柄均不得向下。

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

　　3、閥門安裝前必須進行外觀檢查，閥門的銘牌應符合現行國家標準《通用閥門標志》GB 12220的規定。對于工作壓力大于1.0 MPa 及在主干管上起到切斷作用的閥門，安裝前應進行強度和嚴密性能試驗，合格后方準使用。強度試驗時，試驗壓力為公稱壓力的1.5倍，持續時間不少于5min，閥門殼體、填料應無滲漏為合格。嚴密性試驗時，試驗壓力為公稱壓力的1.1倍；試驗壓力在試驗持續的時間應符合GB 50243標準要求，以閥瓣密封面無滲漏為合格。產品選用要點1、蝶閥主要控制參數為規格尺寸。2、蝶閥為單板式風閥，其結構簡單、加工方便、價格低廉、操作簡便，但調節精度較差，僅適用于通風與空調系統中作開關或粗調節的場合。3、可手動、電動或拉鏈式操作，可90°范圍任意角度固定。

　　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、由于單軸單閥板，承受力有限，在大壓差、大流速條件下時，閥門使用壽命短。

　　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、電動式蝶閥僅有雙位式控制，電動執行機構與多葉閥相同。

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

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