Silent check valve, also known as silent check valve silencing check valve. A silent check valve is an automatic valve that relies on the pressure of medium flow to open and close the valve disc. When the medium flows through the valve body, the valve disc is pushed open by the valve disc. Medium pressure, valve opens, medium flows through. When the medium stops flowing, the valve disc automatically closes due to pressure loss, blocking the medium backflow. The editor of Shanghai Engineering Valve told you that the purpose of silencing check valves is to prevent media backflow in water supply and drainage systems and high-rise building pipe network systems, prevent pump and drive motor reversal, and prevent reverse discharge of pump and drive motor. Container medium.

静音止回阀特点：

Silent check valve features:

阀瓣设计仿照“子弹头”，阀体设计仿照“腰鼓”，不仅改善了介质的流向，而且还降低了流体阻力和流阻系数。

The valve disc design imitates the "bullet head", while the valve body design imitates the "waist drum", which not only improves the flow direction of the medium, but also reduces the fluid resistance and flow resistance coefficient.

静音止回阀体积小，低。结构短而紧凑，导轴与导架之间装有非金属润滑套，提高了阀瓣运动的灵活性，不易产生锁死现象，能有效因阀盘的影响。

The silent check valve has a small volume and low price. The structure is short and compact, with a non-metallic lubricating sleeve installed between the guide shaft and the guide frame, which improves the flexibility of valve disc movement and is not prone to locking, effectively eliminating the influence of the valve disc.

骨架橡胶密封圈镶嵌在阀体上，避免了密封圈被介质直接冲刷，延长了密封圈的使用寿命。

The skeleton rubber sealing ring is embedded on the valve body, avoiding direct erosion of the sealing ring by the medium and extending the service life of the sealing ring.

阀瓣启闭行程短，可防止水锤的发生。

The valve disc has a short opening and closing stroke, which can prevent the occurrence of water hammer.

消声止回阀的应用领域一般安装在合适的排水系统和高层建筑管网系统的泵出口处。此外，该阀门不适合在污水管网中安装使用。

The application field of silencing check valves is generally installed at the pump outlet of suitable drainage systems and high-rise building pipeline systems. In addition, this valve is not suitable for installation and use in sewage pipelines.

静音止回阀的维护与保养如下：

The maintenance and upkeep of the silent check valve are as follows:

贮运时启闭件应在关闭装置内，并同时做好以下工作：

During storage and transportation, the opening and closing parts should be inside the closing device, and the following work should be done simultaneously:

①静音止回阀的翻板应固定在打开位置。

① The flap of the silent check valve should be fixed in the open position.

②内径两端的开口用泡沫板堵住，端口必须用闷盖堵住，防止灰尘和生锈，保持通道清洁和端面平整；

② The openings at both ends of the inner diameter shall be blocked with foam plates, and the ports must be blocked with closed covers to prevent dust and rust, and to keep the channel clean and the end face flat;

③ 对筒体部分进行适当的包装保护防震防撞；

③ Properly package and protect the cylinder body from shock and collision;

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