Check Valve refers to a valve that automatically opens and closes according to the flow of the medium itself to prevent the reverse flow of the medium. It is also called a Check Valve, one-way valve, silencer Check Valve, reverse flow valve and back Pressure Valve. The stop valve is an automatic Universal Valve. Its main function is to prevent the reverse flow of the medium, prevent the pump and drive motor from reversing, and prevent the drainage of the container medium. Stop valves can also be used to supply auxiliary systems where the pressure in the pipeline rises above the system pressure. Stop valves are mainly divided into rotary valves, top Universal Valve (which rotate according to the center of gravity) and lift valves (which move along the axis).
The function of the Check Valve is to prevent reverse flow and allow the medium to flow in one direction. Normally, the valve operates automatically and opens under the influence of fluid pressure flowing in one direction. When fluid flows in the opposite direction, fluid pressure and the valve's self-overlap act on the valve seat, interrupting the flow. Not suitable for media containing solid particles and high viscosity.
1. The valve disc adopts a "bullet head" shape design, and the valve body adopts a "waist drum" shape design to improve the medium flow and reduce the flow resistance coefficient.
2. The Universal Valve adopts a short structure. The head loss is slightly larger than that of the lift silent valve, and it is smaller and cheaper.
3. The structure is compact, and there is a non-metal lubricating cover between the guide shaft and the guide frame. The valve can be lifted and lowered flexibly without dead phenomena.
4. The skeletal rubber sealing ring is directly embedded in the valve body to avoid direct brushing of the sealing ring with the media for a long time. The service life is significantly extended and durable.
5. The valve disc has a short opening and closing stroke, which can effectively prevent the occurrence of water hammer.
6. It is suitable for water supply and drainage systems. The pipe network of high-rise buildings can be set at the water pump outlet. With slight changes in structure, it can be used for water inlet valves, but it is not suitable for sewers.
7. When the Universal Valve is in use, the medium flows in the direction of the arrow.
8. When the medium flows in the specified direction, the valve is opened by the force of the medium. When the medium flows back, due to the valve's own weight and the reverse force of the medium on the valve, the sealing surface of the valve and valve seat is sealed to prevent the medium from flowing back.
9. The valve body and sealing surface are made of stainless steel solder.
10. The structural length complies with the GB/T 1221-2005 standard, and the flange connection complies with the GB/T 17241.6-2008 standard.
