活接止回阀

      H21X六方焊接止回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六方焊接止回阀又称为逆流阀、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六方焊接止回阀整体外形都是六角形式，是参考德国的设计风格而成，是通过外螺纹活接焊接和管道连接，具有安装方便 连接牢固 方便更换等优点。目前天然气行业广泛应用。

活接止回阀

活接止回阀是一种通过活接头（Union Joint） 实现管道连接的止回阀。其核心功能是允许流体单向流动并自动防止介质反向倒流，同时其独特的活接结构使得阀门能够在不移动主管路的情况下，被快速拆卸和安装，极大地方便了系统的维护、清洗或更换。

该阀门的两端通过带内螺纹的活接螺母和配套的活接套进行连接。安装时，将两端的管道分别与阀体上的接头固定，然后拧紧活接螺母，通过压紧垫片或金属密封面来实现密封。这种连接方式结合了螺纹连接的稳定性和快速拆装的便利性。

活接止回阀主要特点：

活接止回阀快速拆装： 活接结构使阀门能够独立地从管路上拆卸下来，无需扭转或移动主管道，维护极其方便。

密封稳定： 采用垫片或金属锥面密封，密封性能好，且便于更换密封件。

活接止回阀可重复使用： 整体结构坚固，可多次拆卸和重复安装，不影响密封效果。

结构紧凑： 设计精巧，在提供便捷功能的同时，保持了较小的体积。

多种材质： 阀体、活接螺母和密封件可根据介质（水、油、蒸汽等）选用黄铜、不锈钢、碳钢等不同材料。

活接止回阀典型应用：

需要频繁维护和清洗的管路系统，如过滤器、泵的进出口。

仪表和仪器设备的进出口连接。

化工、制药、食品行业中需要便于拆卸消毒的流程管道。

供暖和制冷系统的维护节点。

任何需要便于安装和拆卸的中低压管路系统。

Product Overview of Union Check Valves

Product Overview:

A Union Check Valve is a type of check valve that connects to the pipeline via a Union Joint. Its core function is to allow fluid to flow in one direction automatically prevent reverse flow of media. Simultaneously, its unique union structure allows the valve to be quickly disconnected reinstalled without moving the main pipeline, greatly facilitating system maintenance, cleaning, replacement.

The valve ends are connected via internal threaded union nuts matching union ferrules sleeves. During installation, the pipes on both ends are fixed to the valve's connections, then the union nuts are tightened to achieve a seal by compressing a gasket metal sealing surface. This connection method combines the reliability of a threaded connection with the convenience of quick disassembly.

Key Features:

Quick Disassembly & Assembly: The union structure allows the valve to be disconnected the pipeline independently, without the need to rotate move the main pipes, making maintenance extremely convenient.

Reliable Sealing: Uses a gasket metal conical seal, providing good sealing performance easy replacement of sealing elements.

Reusable: The robust structure allows for multiple disassemblies reassemblies without compromising the seal.

Compact Structure: Ingenious design provides convenient functionality while maintaining a small footprint.

Variety of Materials: The valve body, union nuts, seals can be made different materials such as brass, stainless steel, carbon steel, depending on the media (water, oil, steam, etc.).

Typical Applications:

Piping systems requiring frequent maintenance cleaning, such as inlets/outlets of filters pumps.

Inlet/outlet connections for instruments analytical equipment.

Process piping in chemical, pharmaceutical, food industries easy disassembly for sterilization is needed.

Maintenance points in heating cooling systems.

Any low to medium-pressure piping system easy installation disassembly are required.

关键术语翻译 (Key Terminology Translation):

活接止回阀: Union Check Valve

活接头: Union Joint / Union Fitting

活接螺母: Union Nut

活接套: Union Ferrule / Union Sleeve

快速拆装: Quick Disassembly Assembly

垫片: Gasket

维护: Maintenance

中低压管路: Low to Medium-Pressure Piping

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