Maintenance and maintenance of manual diaphragm valves is the key to ensuring their long-term and stable operation, and regular inspections are the basis of maintenance work. It is crucial to conduct a comprehensive inspection of the valve's appearance, sealing surface, transmission components and connecting pipes. Appearance inspection should pay attention to possible cracks, corrosion or wear, which directly affect the valve's sealing and operating flexibility. The state of the sealing surface is particularly important. The sealing performance of the diaphragm valve depends on the tight fit between the diaphragm and the valve seat. Any wear or damage may cause fluid leakage, which in turn affects the performance of the entire system. Therefore, regular careful inspection of the sealing surface is the top priority of maintenance work.
The flexibility of the transmission components cannot be ignored. The valve stem and handwheel need to be regularly inspected to ensure that they are not stuck or loose, which is crucial for operation in emergencies. In addition, the status of the connected pipes also needs to be regularly evaluated. Leakage or corrosion may cause a drop in the fluid pressure and even cause safety accidents. Therefore, maintaining a good condition of the connected pipes is an important part of maintenance work.
Keeping the manual diaphragm valve clean is a key part of the maintenance process, including external and internal cleaning. External cleaning is mainly about removing dirt and impurities from the valve surface to prevent additional wear or affecting operation of the valve. Internal cleaning is more important. Sediment or debris may accumulate inside the diaphragm valve, which will affect the normal flow of the fluid and even cause the valve to stagnate. Therefore, regular cleaning of the valve inside is an important measure to ensure the accuracy of fluid control and the long-term and stable operation of the valve.
Lubrication is an indispensable part of the maintenance of manual diaphragm valves. Transmission components such as valve stems and stem nuts need to be regularly lubricated to reduce friction and wear. It is crucial to choose the right lubricant. The lubricant should not only have good lubricating properties, but also resist corrosion of the working medium. The lubrication cycle should be adjusted according to the valve usage frequency and working conditions to avoid excessive or insufficient lubrication. Overlubrication may lead to the accumulation of lubricant, which will affect the sealing performance of the valve; insufficient lubrication may accelerate the wear of the transmission components and affect the normal operation of the valve.
For the wearable parts of manual diaphragm valves, such as diaphragm and fillers, regular inspection and replacement are important parts of maintenance. As the core component of the valve, the degree of wear of the diaphragm directly affects the sealing performance of the valve. Therefore, regularly checking the integrity of the diaphragm and replacing it when necessary is an important step to ensure the normal operation of the valve. Packing is used to seal the gap between the valve stem and the valve body to prevent fluid leakage. Over time, fillers may fail due to wear or aging, so they also need to be regularly inspected and replaced in time to ensure sealing effect.
In addition, the anti-corrosion treatment of manual diaphragm valves is also an important aspect of maintenance. For valve components that are susceptible to corrosion, protective measures such as coating anticorrosion paint and choosing corrosion-resistant materials should be taken. Regularly check the integrity of the anti-corrosion layer and repair it in time when it is found to be damaged, which can effectively extend the service life of the valve.
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