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Tips to Avoid Check Valve Failure




Check valves are used in industries today to transport fluids via piping. This type of valve allows liquid to flow in one direction only and prevents reverse flow. Moreover, the opening and closing of these valves depend on the hydraulic pressure. We will discuss common problems and tips to avoid them in this article.





In most cases, these units are used in chemical feed pumps, HVAC systems, water lines, condensate lines and steam lines just to name a few. In all of these situations, this component plays a critical role as the reverse flow of a liquid can cause significant damage to the equipment. You may want to look at the symptoms in order to detect any potential problems with the device.


Common Check Valve Problems


Water hammer


Water hammer refers to a high-pressure shock wave generated due to the water changing the direction all of a sudden. This happens when the downstream flow causes the check valve to close suddenly. In this case, the valve can get damaged.


Reverse flow


Usually, reverse flow happens when the unit allows water to go back to the upstream direction. This can be damaging to the equipment like discharge pumps. Reverse flow can cause the impeller to spin in the opposite direction. This could lead to significant damage to the pump.


Improper installation


As with all mechanical equipment, improper installation, maintenance, and/or assembly can lead to serious damage. During the process of installation, the unit has to be in the right direction. It is also important to know the differences between different types of valves.


You should also consider the flow rate, location of the valve, and direction of the unit.


Pipeline debris


If there is a lot of debris in the pipeline, it can block the check valve. The valve won't be able to open or close due to this blockage. The inside mechanism can also be damaged by debris. As a result, the components of the valve may become dislodged.


Wearing seat seals or elastomers are other causes of check valve failure. Besides, excessive temperatures may also cause failure.


Preventative Measures


If you want to prevent check valve failure and make these units last longer, we suggest that you take preventive measures and perform regular maintenance.


It is important to keep the system clean in order to prevent debris from accumulating inside the unit. You can do this by installing filters and high-quality covers. Apart from this, the system should be flushed on a regular basis in order to get rid of settled debris.


Another effective method to prevent valve failure is the regular valve lubrication. This can minimize friction between different components and extend the life of the entire system. The system will perform more efficiently as a result.


These tips will help you prevent any check valve failures and save you a lot of money in the long-term.


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