高压焊接单向阀
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技术参数
高压焊接单向阀的工作原理是在一个方向流动的流体压力作用下，阀瓣打开；流体反方向流动时，由流体压力和阀瓣的自重合阀瓣作用于阀座，从而切断流动。H21X高压焊接单向阀又称为逆流阀、逆止阀、背压阀、单向阀。这类阀门是靠管路中介质本身的流动产生的力而自动开启和关闭的，属于一种自动阀门。止回阀用于管路系统，其主要作用是防止介质倒流、防止泵及其驱动电机机反转，以及容器内介质的泄放。H21X高压焊接单向阀是通过外螺纹焊接连接管道，具有安装方便 连接牢固 方便更换等优点。焊接形式又分为对焊和承插焊2种。用户可根据各自情况选购。
高压焊接单向阀
高压焊接单向阀是一种专为高压工况设计的，采用焊接方式与管道系统连接的单向阀（逆止阀）。其主要功能是强制确保流体仅沿单一方向流动，并自动、稳定地阻止任何方向的反向流动，是保障高压管网和关键设备安全的核心部件。
高压焊接单向阀与低压阀门或法兰连接阀门不同，该类型阀门采用焊接端连接（对焊或承插焊），从而提供了极高的连接完整性和密封性，杜绝了法兰连接在高压下可能发生的泄漏风险。阀体通常采用高强度合金钢或不锈钢制造，内部密封元件（如阀瓣、阀座）经过特殊硬化处理，并配备重型弹簧，以确保在高压、高压差及流体脉动工况下能够迅速、严密地关闭。
高压焊接单向阀主要特点：
高压力等级： 设计承压能力高，通常用于Class 600及以上或PN100及以上压力级别的管路系统。
高压焊接单向阀零泄漏： 焊接连接实现了与管道性密封，从根本上避免了接口泄漏。
高压焊接单向阀高强度结构： 阀体采用锻件或高强度材料，能承受极高的管道应力及压力冲击。
高压焊接单向阀高压密封性： 金属-to-金属密封或硬面密封，确保在高压下仍具有很好的密封性能。
高压焊接单向阀耐冲刷与耐腐蚀： 内部元件常进行表面硬化处理（如堆焊司太立合金），以耐受高压流体的冲刷和腐蚀。
紧凑与轻量化： 相较于同压力等级的法兰阀门，焊接结构更为紧凑，重量更轻。
高压焊接单向阀典型应用：
石油与天然气行业：油气井口装置、输送管道、炼化装置。
高压蒸汽系统：电站、热电联产系统。
高压注水系统：油田注水、锅炉给水系统。
化工与石化过程：高压反应器进出口、物料输送管线。
氢能、氮气等高压气体输送系统。
Product Overview of High-Pressure Welded Check Valves
Product Overview:
A high-pressure welded check valve is a type of one-way valve (non-return valve) specifically designed for high-pressure services connected to the piping system via welding. Its primary function is to mandatorily ensure fluid flow in one direction only to automatically reliably prevent any reverse flow, making it a critical component for the safety of high-pressure pipelines key equipment.
Unlike low-pressure flanged valves, this type employs welded end connections (Butt Welding Socket Welding), which provide superior connection integrity leak-tightness, eliminating the potential for leakage inherent to flanged joints under high pressure. The valve body is typically constructed high-strength alloy steel stainless steel. Internal sealing elements (such as the disc seat) are specially hardened paired with a heavy-duty spring to ensure rapid tight closing under conditions of high pressure, high pressure differential, fluid pulsation.
Key Features:
High Pressure Rating: Designed for high pressure containment, commonly used in Class 600 above PN100 above piping systems.
Zero Leakage: Welded connections provide a permanent seal with the pipeline, eliminating joint leakage at the source.
High-Strength Construction: The forged high-strength body can withstand extreme pipe stress pressure shocks.
High-Pressure Sealing: Metal-to-metal seal hard-faced seating ensures excellent sealing performance even under high pressure.
Erosion & Corrosion Resistance: Internal components are often surface-hardened (e.g., Stellite overlayed) to withstand erosion corrosion high-velocity fluids.
Compact & Lightweight: The welded design is more compact lighter in weight compared to flanged valves of the same pressure class.
Typical Applications:
Oil & Gas Industry: Wellhead equipment, transmission pipelines, refining chemical plants.
High-Pressure Steam Systems: Power stations, cogeneration plants.
High-Pressure Water Injection Systems: Oilfield water flooding, boiler feedwater systems.
Chemical & Petrochemical Processes: Inlet/outlet of high-pressure reactors, process transfer lines.
Hydrogen, Nitrogen, other high-pressure gas transmission systems.
关键术语翻译 (Key Terminology Translation):
高压焊接单向阀: High-Pressure Welded Check Valve
对焊: Butt Weld (BW)
承插焊: Socket Weld (SW)
高强度合金钢: High-Strength Alloy Steel
阀瓣与阀座: Disc Seat
硬化处理: Hardening / Hard-Facing
堆焊司太立合金: Stellite Overlaying / Hardfacing
零泄漏: Zero Leakage
压力等级: Pressure Class (e.g., ASME Class 1500) / Pressure Rating (e.g., PN250)
耐冲刷: Erosion Resistance
锻件: Forged Body