I would like to ask everyone: do you apply grease to the valve stem during its use?
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In our facility, a large amount of lubricant is applied to valve stems of all types. However, for valves that are not used for a long time, especially those exposed to high temperatures, the lubricant dries out. At the same time, a lot of dust gets mixed into the lubricant, which in turn hinders the operation of the valves. Meanwhile, areas that need lubrication, such as the bearings on the handwheel, do not receive any lubrication. I wonder what everyone’s situation is like – what is the perfect solution?
Hehe, this is a matter of leadership awareness. Since he likes it this way, you had better do it this way. As for how to proceed, maintenance measures should be formulated separately based on factors such as the valve’s design and structure, the medium used, the material of the valve components, as well as the environment, temperature, and pressure. For some media such as oxygen, contact with oils must be prohibited. High-temperature valves also require appropriate treatment. If filler replacement is carried out regularly, installing dust covers can solve the problem.
Lubricant is not needed for high-temperature environments; it can be applied in low-temperature and normal-temperature conditions, which makes it easier to operate the switch
The valve will be coated, regardless of high or low temperatures; after coating, the outside is covered with BELLOW plastic hoses. As for what you mentioned about it drying out, I don’t recall that happening
Valves require regular maintenance, but different types of grease are used; the materials needed for maintenance vary depending on factors such as high temperatures, low temperatures, and oxygen exposure. After applying the standard grease, it can be protected with plastic wrap or special paper, and it should be replaced regularly； Maintenance is not a one-time affair
There are several key parts that require maintenance for valves: the seal, bearings, and copper sleeves. Each of these parts needs to be maintained according to specific conditions. We have encountered problems similar to the one you mentioned – where people apply oil to the valve stem; only a small amount of oil reaches the areas around the copper sleeves and bearings. When grease is used, it’s applied only to the section around the handwheel. This not only fails to provide proper lubrication but also contaminates the operators, as grease ends up everywhere in the work area! This needs to be handled on a case-by-case basis, categorized accordingly; grease should be applied regularly to the valve stem, at the area below the handwheel, as opening the valve will carry the grease to the moving parts! Regular cleaning and lubrication of the bearings and copper sleeves are necessary to keep the valve flexible……
Valve maintenance has not received sufficient attention; especially for valves that are not in use for long periods, issues such as high torque and valve sticking often occur. Suggestion: Apply oil regularly, twice; for areas such as the valve stem threads of gate valves, a plastic sleeve can be used
Applying it is necessary. However, domestic valves have always been neglected, with no companies providing proper protection for them. Maintenance is only provided by purchasing repair kits for imported products. Domestic valves just break when they fail. Fix it urgently. No one pays attention
If it is a high-temperature valve, ordinary grease cannot be used. At high temperatures, ordinary lubricants dry out, which in turn increases friction. At this time, high-temperature lubricants containing solid additives are needed, such as MP-50 and Jet-Lube. But if the temperature exceeds 500 degrees Celsius, it’s a different situation, and ultra-high temperature valve stem packing is required.
Lubricant should be applied to all threaded parts of the valve. Protection methods have their own characteristics in different regions. Offshore oil platform facilities do not need protection as they are far from dust. In the southern regions, bamboo tubes are used as protective covers, while in the northern regions, mineral water bottles are used for that purpose. The working people possess infinite wisdom.
This is relatively more comprehensive. External protection and internal protection need to be distinguished in order to achieve satisfactory results.