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In industrial processes, the instrument ball valve, as an important control element, usually undertakes the adjustment and control of important parameters such as flow rate and pressure. However, long-term use and complex working conditions may cause different degrees of damage to the instrument ball valve, which will affect the operating efficiency and safety of the entire system.
The most common inspection method is to observe the appearance and operating status of the valve. If obvious wear, corrosion or cracks are found on the outside of the ball valve, it may be that the internal and external structure of the ball valve has been seriously damaged. This situation usually means that the sealing performance of the valve may have been degraded and the flow of fluid or gas cannot be continued to be effectively controlled. Especially for instrument ball valves used in corrosive or high temperature and high pressure environments, it is necessary to regularly check whether their surfaces are aging or damaged.
The sealing of a valve is another important criterion for determining whether it needs repair or replacement. Instrument ball valves usually use a sealing method between the ball and the sealing ring to achieve fluid control. If the ball valve is found to have leaks when it is opened or closed, especially in piping systems with higher pressures or higher flow rates, this may mean that the ball valve seal has been aged or damaged. Poor sealing will not only lead to a decrease in control accuracy, but may also cause safety accidents. Therefore, if a leakage is found, a detailed inspection must be carried out immediately and whether the valve needs to be replaced or the sealed part must be repaired.
In addition to physical damage, the operating performance of the valve is also an important basis for judging whether it needs repair. A healthy instrument ball valve should be easy and smooth when operating, whether manually or driven by a pneumatic or electric actuator. If the ball valve is stuck or has too much resistance during opening and closing, it may be caused by damage to the parts inside the valve body, deformation of the valve stem, poor lubrication or excessive accumulation of scale. In this case, it is usually necessary to check the parts inside the ball valve to clean, lubricate or replace the relevant parts.
For some high-precision instrument ball valves, the flow and pressure control accuracy is also one of the key indicators. If you find that the valve cannot accurately adjust the flow rate or pressure during use, and the effect is not obvious during the adjustment process, it may be caused by wear of the valve seat or ball. This wear will affect the regulation performance of the ball valve, causing the system to fail to operate stably. At this time, the wear of the ball valve should be checked. If the original control effect cannot be restored, it will need to be replaced or repaired.
The working environment of the valve is also an important factor that determines its service life and performance. Under some extreme operating conditions, such as high temperature, high pressure or corrosive media environments, the durability of the instrument ball valve will be greatly affected. Even if the valve itself does not experience obvious appearance damage, it may experience an internal performance degradation due to long-term in this environment. Regular inspection and evaluation of valves, especially the materials' high temperature resistance and corrosion resistance, can help detect potential failure risks early.
Regular maintenance and inspection are an effective way to avoid serious problems with the instrument ball valve. By cleaning, lubrication, fastening and replacing damaged parts, the valve can be significantly extended and its performance remains stable. Only when the repair work cannot restore its original function, it is necessary to consider replacing the entire valve.
