一、进口内螺纹立式止回阀概述

进口内螺纹立式止回阀采用内螺纹连接，立式结构，不锈钢材质的小口径止回阀。结构合理、造型美观。，造型小，带有弹簧装置。垂直与水平安装均可等特点。主要适应管道系统中防止介质倒流使用。硅溶胶精密铸造不锈钢阀体。

内螺纹立式止回阀工作原理：

内螺纹立式止回阀正常处于关闭状态，由于管线中进口端介质的压力作用，而克服弹簧阻力使阀门开启。当进口端介质压力低于出口端时，弹簧将阀芯推向阀座而使阀门关闭，阻止介质逆流，故起止回作用。内螺纹立式止回阀由于采用弹簧支撑阀芯，故采用立式安装或卧式装均可。

The internal threaded vertical check valve adopts an internal threaded connection, a vertical structure, and a small caliber check valve made of stainless steel material. Reasonable structure and beautiful appearance., Small in shape with spring device. Features such as both vertical and horizontal installation. Mainly suitable for preventing medium backflow in pipeline systems. Silicon sol precision casting stainless steel valve body.

Working principle of internal thread vertical check valve:

The internal thread vertical check valve is normally in a closed state. Due to the pressure of the medium at the inlet end of the pipeline, it overcomes the resistance of the spring and opens the valve. When the pressure of the medium at the inlet end is lower than that at the outlet end, the spring pushes the valve core towards the valve seat, causing the valve to close and preventing the medium from flowing back, thus playing a check function. Internal thread vertical check valves can be installed vertically or horizontally due to the use of spring supported valve cores.

二、进口内螺纹立式止回阀产品特点

1、内螺纹立式止回阀具有结构短、体积小、质量轻。

2、内螺纹立式止回阀阀瓣关闭快速，水锤压力小。

3、内螺纹立式止回阀流道通畅，流体阻力小；动作灵敏，密封性能好。

4、内螺纹立式止回阀安装方便，可在水平、垂直两个方向的管路上安装。

5、内螺纹立式止回阀阀板采用对偶板上加两个扭力弹簧的设计，可使阀板自行速闭。

6、内螺纹立式止回阀因速闭作用，可防止介质倒流，消除水锤作用强。

1. The internal thread vertical check valve has a short structure, small volume, and light weight.

2. The internal thread vertical check valve disc closes quickly and the water hammer pressure is low.

3. The internal thread vertical check valve has a smooth flow channel and low fluid resistance; The action is sensitive and the sealing performance is good.

4. The internal thread vertical check valve is easy to install and can be installed on pipelines in both horizontal and vertical directions.

5. The internal thread vertical check valve plate adopts a design of adding two torque springs to the dual plate, which can make the valve plate self close quickly.

6. The internal thread vertical check valve can prevent medium backflow and eliminate water hammer due to its quick closing function.

三、进口内螺纹立式止回阀结构图