The check valve is an important automatic valve device in the fluid control system. Its core functions are reflected in the following aspects:
1. Preventing medium backflow
Through the automatic opening and closing mechanism of the valve disc (such as the round valve body) under the deadweight and medium pressure, the check valve forces the fluid to flow only in one direction from the water inlet to the water outlet. When the fluid flows in the opposite direction, the valve disc quickly closes to block the passage to prevent the backflow from impacting the pipeline or equipment.
2. Protecting equipment safety
Preventing pump body reversal: In the pump drive system, the check valve can intercept the backflow medium to prevent the pump and motor from reversing and damaging due to reverse pressure;
Isolating container medium: By blocking the reverse flow path, the medium in the container is prevented from leaking or contaminating due to unexpected pressure changes.
3. Maintaining system pressure stability
The check valve effectively suppresses the pressure fluctuation caused by backflow by limiting the one-way flow of the fluid, ensuring that the system working pressure operates stably within the design range.
4. Special scene adaptation
In response to different medium characteristics and working conditions, check valves have derived various types. For example:
Lift check valve: suitable for clean media, adapted to pipeline layout through vertical or horizontal installation;
Slow closing check valve: optimizes closing speed to reduce water hammer effect;
Spring/butterfly check valve: suitable for high viscosity or particle-containing media.
Its structural design (such as the elastic valve body described in the patent) further optimizes sealing performance and installation convenience, but it should be noted that it is not suitable for media with high solid particles or excessive viscosity.
