内置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。RSH1内置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。RSH1内置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。RSH1内置止回阀是放置于机械或者设备内部。特定位置或者管线上着止回作用，具有安装方便 连接牢固 方便更换等优点，用户可根据各自情况选购。

内置止回阀

内置止回阀，也称为内置式逆止阀或单向阀，是一种安装于流体管路或系统内部的阀门附件。其核心功能是允许流体沿一个方向自由流动，并能自动防止流体反向倒流，从而保障系统的安全、稳定运行。

该阀门的设计通常紧凑小巧，旨在集成到泵、压缩机、喷嘴或其他设备的内部或端口，而非作为独立的管道元件安装。其工作原理主要依靠流体自身的压力差：当正向流体压力大于阀瓣（如弹簧、阀球或阀片）的预紧力时，阀门开启；当流向停止或发生逆转时，阀瓣在弹簧力、重力或反向流体的作用下自动关闭，形成有效密封。

内置止回阀主要特点：

防倒流： 核心功能，防止介质回流造成的设备损坏、水锤效应或污染。

内置止回阀紧凑结构： 设计小巧，节省空间，便于内置安装。

内置止回阀自动操作： 完全依靠流体动力学自动启闭，无需外部动力或人工干预。

内置止回阀低流阻： 优化设计旨在减小对正向流体的阻力，降低压力损失。

内置止回阀快速响应： 能迅速关闭，有效减弱水锤冲击。

内置止回阀典型应用：

水泵的出口，防止停泵时水倒流。

计量泵、喷射泵的内部。

液压与气动系统。

供水、供暖及消防系统。

化工、石油等领域的过程管道。

Product Overview of Built-in Check Valves

Product Overview:

A built-in check valve, also known as an integral non-return valve one-way valve, is a valve accessory installed within a fluid pipeline system. Its core function is to allow fluid to flow freely in one direction while automatically preventing reverse flow, thereby ensuring the safety, stability, efficient operation of the system.

The valve is typically designed to be compact small, intended for integration into the interior ports of pumps, compressors, nozzles, other equipment, rather than being installed as a separate pipeline component. Its operating principle primarily relies on the pressure differential of the fluid itself: it opens when the forward fluid pressure exceeds the preload force on the disc (such as a spring, ball, flap); it closes automatically via spring force, gravity, reverse fluid pressure when flow stops reverses, forming an effective seal.

Key Features:

Backflow Prevention: The core function, preventing equipment damage, water hammer effects, contamination caused by media backflow.

Compact Design: Small space-saving, facilitating built-in installation.

Automatic Operation: Opens closes automatically based entirely on fluid dynamics, requiring no external power manual intervention.

Low Flow Resistance: Optimized design aims to minimize resistance to forward flow, reducing pressure drop.

Rapid Response: Closes quickly to effectively mitigate water hammer shock.

Typical Applications:

Outlet of water pumps to prevent backflow when the pump stops.

Interior of metering pumps, injection pumps.

Hydraulic pneumatic systems.

Water supply, heating, fire protection systems.

Process pipelines in chemical, petroleum, other industries.

关键术语翻译 (Key Terminology Translation):

内置止回阀: Built-in Check Valve / Integral Check Valve

逆止阀 / 单向阀: Non-return Valve (NRV) / One-way Valve

防倒流: Backflow Prevention / Prevent Reverse Flow

阀瓣: Disc (通用), 具体可以是 阀球 (Ball)、阀片 (Flap/Plate)、瓣片 (Swing Disc)

弹簧: Spring

水锤效应: Water Hammer

紧凑结构: Compact Structure / Compact Design

自动操作: Automatic Operation

流阻 / 压力损失: Flow Resistance / Pressure Drop (Pressure Loss)

快速关闭: Rapid Closing / Quick Response