Do you know the methods of common valve maintenance? If you are not sure, then follow the editor to increase your knowledge!
◆The purpose of storage and maintenance is to prevent damage to the valve during storage, or reduce quality. In fact, improper storage is one of the important reasons for valve damage.
◆Valves should be kept in an orderly manner. Small valves should be placed on shelves. Large valves can be arranged neatly on the floor of the warehouse. They should not be stacked in disorder, and flanges should not be connected to the surface. Touch the ground. This is not only for aesthetics, but mainly to protect the valve from being damaged.
◆Due to improper storage and handling, the hand wheel is broken, the valve stem is knocked, the fixing nut of the hand wheel and the valve stem is loose and lost, etc. These unnecessary losses should be Avoid
◆Asbestos packing should be taken out for valves that will not be used in a short period of time to avoid electrochemical corrosion and damage to the valve stem.
◆For valves that have just entered the warehouse, they must be inspected. If rainwater or dirt enters during transportation, Wipe clean, and then store it. The inlet and outlet of the
valve should be sealed with wax paper or plastic sheet to prevent dirt from getting
in. The processing surface of the valve that can rust in the atmosphere should be coated with anti-rust oil to protect it. The valve should be
placed outdoors. , Must be covered with rain-proof and dust-proof items such as linoleum or tarpaulin. The warehouse where the valve is stored should be kept clean and dry
Use and maintenance
◆The purpose of use and maintenance is to extend the life of the valve and ensure reliable opening and closing.
◆Stem thread, which often rubs against the stem nut, should be coated with a little yellow dry oil, molybdenum disulfide or graphite powder for lubrication.
◆Open and close infrequently For valves, turn the handwheel regularly to add lubricant to the thread of the valve stem to prevent it from biting.
◆Outdoor valves should be covered with a protective cover to prevent rain, snow, dust and rust
◆If the valve system is mechanically waiting, Add lubricating oil to the gearbox on time. It is
necessary to keep the valve clean. It is
necessary to frequently check and maintain the integrity of the other parts of the valve. If the fixing nut of the handwheel falls off, it must be equipped and cannot be used properly, otherwise it will grind the upper part of the valve stem, and gradually lose the reliability of coordination, or even fail to
operate. Do not rely on the valve to support other heavy objects, and do not stand on the valve.
◆ The valve stem, especially the threaded part, should be wiped frequently, and the lubricant that has been soiled by the dust should be replaced with a new one, because the dust contains hard debris, which is easy to wear the thread and the surface of the valve stem, which affects the service life
◆The packing is directly related to the key seals that leak when the valve is switched on and off. If the packing fails and causes leakage, the valve will also fail, especially the valve of the urea pipeline, because the temperature is relatively high, corrosion is more harmful, and the packing is prone to aging . Enhancing maintenance can extend the life of the packing. When the
valve leaves the factory, in order to ensure the elasticity of the packing, it is generally subject to the static pressure test without leakage. After the valve is installed in the pipeline, due to temperature and other factors, extravasation may occur. At this time, it is necessary to tighten the nuts on both sides of the packing gland in time, as long as there is no leakage. Tighten it to prevent the packing from losing its elasticity and sealing performance.
◆Some valve packing is equipped with molybdenum disulfide grease. After several months of use, the corresponding lubricating grease should be added in time. When it is found that the packing needs to be supplemented, it should be added in time. Packing to ensure its sealing performance
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