Introduction of swing check valve Manufacturers china: little knowledge about check valve
Regarding the knowledge you need to know about check valves, let's follow the editor of swing check valve Manufacturers china to have a look!
1. The applicable occasion of swing check valve is low pressure and large diameter, and the installation occasion is restricted;
2. Diaphragm check valve is suitable for pipelines that are prone to water hammer. The diaphragm can well eliminate the water hammer caused by the backflow of the medium. It is generally used on low-pressure and normal temperature pipelines, especially for tap water pipelines, and works with general media. The temperature is between -12-120℃, and the working pressure is <1.6MPa, but the diaphragm check valve can achieve a larger diameter.
3. The spherical check valve is suitable for medium and low pressure pipelines and can be made into a large diameter;
4. The shell material of the spherical check valve can be made of stainless steel, and the hollow sphere of the seal can be wrapped with polytetrafluoroethylene engineering plastic, so it can also be applied to the pipeline of general corrosive media, and the working temperature is -101--150 Between ℃, its nominal pressure is ≤4.0MPa, and the nominal passage range is between DN200-DN1200;
5. When selecting check valves for incompressible fluids, the required closing speed should be evaluated, and the type of check valve that may meet the required closing speed should be selected;
6. The check valve for compressible fluid can be selected according to the similar method of check valve for incompressible fluid. If the medium flow range is large, the check valve for compressible fluid can be used A deceleration device, if the medium flow is stopped and started quickly and continuously, such as the outlet of the compressor, a lift check valve is used;
7. The corresponding size of the check valve should be determined, and the valve supplier needs to provide the data of the selected size, so that the valve size when the valve is fully opened at a given flow rate can be found;
In summary, the editor of swing check valve Manufacturers china tells: a brief introduction to some knowledge about check valves.