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In industrial piping systems, instrument ball valves are crucial control elements for regulating and controlling the flow of fluid. Over time or due to the influence of the operating environment, the instrument ball valve may leak or leak. This will not only affect the accuracy of fluid control, but may also cause safety hazards.
When there is water leakage or leakage in the instrument ball valve, the specific location of the leakage is first necessary. You can observe from the outside of the valve to check whether there is obvious liquid or gas leaking from the valve body, valve cover or connection area. Generally, the leakage may appear on the valve seat sealing surface, the valve stem sealing, the connection between the valve body and the pipe, etc. Through visual inspection, combined with the judgment of touch or smell, preliminary determination of the leakage can help locate the problem.
After determining the location of the leakage, further detailed analysis of the problem can be performed. If the leakage occurs on the sealing surface of the valve, it is usually caused by aging, wear or damage to the sealing material. The sealing design of the instrument ball valve relies on the close contact between the ball and the valve seat, and any minor damage can cause leakage problems. If cracks, deformation or wear are found in the sealing material, the seal should be replaced in time.
If the leakage occurs at the stem seal, it is usually caused by damage to the stem seal or corrosion of the stem itself. The function of valve stem seal is to prevent fluid from leaking through the valve stem. If there is a leakage problem, it means that the seal has failed. During the inspection, you can check for any signs of liquid leakage by touching the area near the valve stem with your hands. If the leakage is obvious, consider replacing the stem seal. When replacing the stem seal, it is necessary to ensure that the new seal is installed tightly, positioned correctly, and to remove dirt or corrosion from the valve stem surface.
If the leakage occurs at the connection between the valve body and the pipe, it may be caused by the insolid connection of the pipe or the loose connection bolts. In this case, the valve connection needs to be re-checked to ensure that all connection bolts are tightened and that there are no cracks or damage on the connection surface. If the pipe sealing gasket is aging or damaged, a new gasket is also required to restore the sealing performance.
If the leakage occurs between the actuator and the valve body of the valve, it may be caused by abnormal operation of the actuator. Instrument ball valves are usually equipped with pneumatic, electrical or hydraulic actuators that control the valve's switch. When the actuator fails, it may affect the sealing effect of the valve, resulting in leakage. At this time, you need to check the working status of the actuator to ensure that it can operate normally. If the actuator is found to be faulty, it needs to be repaired or replaced.
When troubleshooting leak faults of instrument ball valves, factors of the working environment need to be considered. For example, if the valve is in a high temperature, corrosive medium, or high pressure environment for a long time, it may accelerate wear or aging of the valve assembly. Regular inspection and maintenance of valves, especially for long-term use, to detect problems early and take repair measures. If the valve is found to have a serious corrosion degree, or there is still a leakage problem after multiple repairs, the entire valve may need to be replaced.
In addition to physical inspection, leakage problems in the instrument ball valve may also be related to the characteristics of the fluid medium. Some media may be highly corrosive or easily damage the valve seals and metal parts under high temperature and high pressure conditions. Therefore, when repairing leakage problems, it is necessary to select appropriate repair materials based on the specific working medium to ensure that the repaired valve can continue to operate stably.
