In many industrial and civil facilities, valves play a key role in controlling fluid flow. However, like other mechanical equipment, valves also need regular and careful maintenance to ensure that they are always in good working condition and ensure the stability and safety of the entire fluid system.
Daily inspection is the basic work of valve maintenance. Inspection personnel should carry out detailed appearance inspection of the valve according to the prescribed route and time interval. Check the valve body for signs of rust, deformation, or damage, and the stem is clean, well-lubricated, and free of bending or sticking. For valves exposed to outdoor or harsh environments, it is more important to pay attention to whether the protective coating is intact, if the coating is found to be peeling, it should be repaired in time to prevent further corrosion of the valve body. At the same time, check whether the valve identification plate is clear and complete, and the valve model, specification, pressure level, switch direction and other information on the identification plate is crucial for the operator to correctly operate the valve.
The sealing performance of the valve is one of its core indicators, so regular inspection and maintenance of the valve seals is essential. For soft sealed valves, such as rubber sealed ball valves, butterfly valves, etc., check whether the sealing rubber ring has aging, cracking, deformation and other conditions. If there is a problem with the seal, it should be replaced in time to ensure the tightness of the valve. When replacing seals, it is necessary to select high-quality sealing products that match the valve model and working condition, and install them in strict accordance with the operating procedures. For metal sealed valves, such as gate valves, globe valves, etc., to check the wear of the sealing surface, minor wear can be repaired by grinding, and serious wear may need to replace the sealing surface or the entire valve.
Lubrication work for the normal operation of the valve can not be ignored. Between the valve stem and the stuffing box need to be regularly filled with appropriate grease to reduce friction, prevent the valve stem stuck, to ensure the flexible operation of the valve. At the same time, the transmission parts of the valve, such as the hand wheel, gear box, etc., should also be regularly lubricated and maintained according to the use. When choosing grease, factors such as the operating temperature, pressure and medium characteristics of the valve should be considered to ensure that the grease can play a good lubrication role in the corresponding working conditions.
Regular operation testing of the valve is also an important part of maintenance. Manually or electrically operate the valve to check whether it is opened and closed smoothly, and whether there are abnormal phenomena such as blockage and leakage. In the operation process, pay attention to observe whether the stroke of the valve meets the requirements and whether the limiting device works normally. For the electric valve, it is also necessary to check the performance of its electrical control system, including the operating state of the motor and the response speed of the control signal. If the valve operation is abnormal, it should be found in time to find the cause and repair, to avoid the valve can not work normally at a critical moment.
In addition, it is also necessary to establish a sound valve maintenance record file. Maintenance records shall record in detail the valve model, installation position, time and content of each inspection, maintenance, and test, as well as found problems and treatment measures. Through the analysis of maintenance records, the operation trend of the valve can be found in time, the possible failure can be predicted in advance, and the corresponding preventive measures can be formulated, so as to improve the scientific and effective maintenance of the valve.
In short, although the daily maintenance of the valve may seem cumbersome, it is the key to ensure the stable operation of the fluid system. Only through careful inspection, seal maintenance, lubrication maintenance, operational testing and perfect record management, can we ensure that the valve is always in good working condition and provide reliable fluid control services for industrial production and daily life.
