A check valve, also known as a check valve, check valve, return valve or isolation valve, is a valve that can block the backflow of media. Its basic function is to ensure that the medium can only flow in one direction and prevent the backflow of the medium. These valves are critical in many industrial and civil applications, especially where there is a need to prevent fluid backflow.

‌ pumps and piping systems ‌ : Check valves are often used in pump outlet piping as a protection device when the pump is stopped to prevent the water from backing up. In pump systems, check valves prevent the pump and drive motor from reversing and protect equipment from damage.

‌ Fire protection system ‌ : Check valves are used to prevent water flow from flowing back and ensure that the fire protection water supply is not affected. Especially in the fire pump outlet pipe, the application of check valve is particularly important.

‌‌ semiconductor cleaning equipment ‌ : Check valve made of PFA material is widely used in semiconductor cleaning equipment, because of its corrosion resistance, high temperature resistance and excellent sealing performance, to ensure the smooth cleaning process.

‌ Sewer system ‌ : Sewer check valves are used to prevent the backflow of sewage and wastewater, protecting the environment and the health of occupants. This type of check valve is usually installed on the branch downpipe to prevent sewage from backing into the clean drainage system.

‌‌ chemical storage tank ‌ : fireproof check valve is used in chemical storage tank to effectively prevent the flame from spreading along the pipeline and protect the safety of the storage tank and surrounding facilities.

In addition, there are many types of check valves, such as lift and swing, according to the specific application scenario to choose the right type of check valve is very important. For example, swing check valves are suitable for large diameter pipes, while lift check valves are suitable for small diameter applications. In general, the application of check valves is very wide, from industrial production to daily life, play an irreplaceable role.