What should I do if the check valve cannot stop the water?

Can't the check valve stop the water? These methods will help you solve it

Check valves are supposed to be the "loyal guardians" to prevent water backflow, but when they fail to stop the water, it can cause a lot of trouble. However, don't worry, we can investigate and solve the problem from multiple aspects.

The installation process needs to be checked first. Check valves have clear water flow direction markings. If installed in the wrong direction, it is like pointing a "return path" to the water flow, and the water will naturally flow back. At this point, simply carefully check the arrow markings on the valve and reinstall it in the correct direction. In addition, the installation position of the check valve also requires attention. If it is installed at the bend of the pipeline or near the outlet of the water pump, the water flow state will be complex and the impact force will be large, which will affect its normal operation. It should be installed on a horizontal and steady water flow pipeline, away from bends and pump outlets, to create a good working environment for it.

Component damage is also a common cause. The valve disc and valve seat are key parts for achieving sealing in check valves. If the valve disc is severely worn and cannot fit tightly with the valve seat, water will leak through the gap. Similarly, deformation of the valve seat can also affect the sealing effect. For such problems, if the degree of wear or deformation is light, grinding tools can be used to finely grind the sealing surface to restore its flatness and smoothness; If the damage is severe, a new valve disc or seat needs to be replaced. The failure of the spring cannot be ignored. It is responsible for timely pulling the valve disc back to the closed position when the water flow stops. If the spring fatigue, rust, and lose elasticity, the valve disc cannot be closed in time. At this point, a new spring with the same specifications as the original spring needs to be replaced.

The medium factor may also cause the failure of the check valve. If the water contains a large amount of impurities such as sediment, rust, etc., these impurities will get stuck between the valve disc and the valve seat, hindering the valve disc from closing. A filter can be installed in front of the check valve, and the filter screen should be cleaned regularly to reduce impurities from entering the valve. In addition, the temperature and pressure of water can also affect the performance of check valves. If it exceeds its rated range, corresponding adjustment measures should be taken, such as installing pressure reducing valves or cooling equipment.