Check valves are used in pipeline systems. Their main functions are to prevent the backflow of the medium, to prevent the pump and its drive motor from reversing, and to release the medium in the container. The check valve can also be used to replenish the auxiliary system where the pressure may rise above the main system pressure. The check valve can be applied to pipelines of various media according to different materials. The check valve is installed on the pipeline, which becomes one of the fluid components of this complete pipeline. The valve flap opening and closing process are affected by the transient flow state of the system in which it is located; in turn, the closing characteristics of the valve flap have an effect on the fluid flow state.
Principle Introduction:
Wafer check valves are also called reverse flow valves, check valves, back pressure valves, and check valves. This type of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which belongs to an automatic valve.
The wafer check valve is suitable for nominal pressure PN1.0MPa～42.0MPa, Class150～2500; nominal diameter DN12～1200mm, NPS1/2～48; working temperature -196～540℃ on various pipelines, used to prevent Backflow of media. By choosing different materials, it can be applied to various media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and urea.
Structural features:
1. Water hammer pressure: very small, the flap travel is short, the flap is light, and there is a spring-assisted closing, the closing speed is very fast;
2. The structural length is very short, the volume is small, and the weight is very light, which brings great convenience to the installation, handling, storage and piping layout of the valve, and can save a lot of materials and reduce the cost;
3. The fluid resistance is large, the coefficient is &6.4-2.8;
4. Installation method: horizontal installation or vertical installation, lightweight and easy installation;
5. The opening pressure is small, the valve flap can be fully opened under a small pressure difference;
6. The valve has an overall structure, which is simple and compact. The valve has a low impact force when closed, a small water hammer pressure, a long valve life, and high reliability.
The above information is provided by the check valve supplier.
