How should the daily maintenance of the valve be maintained
Date:2023-08-26 Click:577
1, the valve should be stored in a dry and ventilated room, and both ends of the channel should be blocked.
2, long-term storage valve should be regularly checked, remove dirt, and apply anti-rust oil on the processing surface.
3, after installation, should be regularly inspected, the main inspection items:
(1) Sealing surface wear.
(2) The trapezoidal thread wear of the valve stem and valve stem nut.
(3) Whether the packing is outdated and ineffective, if there is damage, it should be replaced in time.
(4) After the valve repair and assembly, the sealing performance test should be carried out.
(1) Storage and maintenance
The purpose of maintenance is not to damage the valve in custody or reduce its quality. In fact, improper storage is one of the important reasons for valve damage. Valve storage, should be well organized, small valves on the shelf, large valves can be neatly arranged on the warehouse floor, can not be stacked in chaos, do not let the flange connection surface contact the ground. This is not only for beauty, mainly to protect the valve from damage. Due to improper storage and handling, the handwheel is broken, the valve stem is distorted, the fixing nut of the handwheel and the valve stem is loose and lost, etc., these unnecessary losses should be avoided. For valves that are not used in the short term, asbestos packing should be removed to avoid electrochemical corrosion and damage to the valve stem. The valve that has just entered the warehouse should be checked. If rain or dirt is entered during transportation, it should be wiped clean and then stored. Valve inlet and outlet should be sealed with wax paper or plastic sheet to prevent dirty things in. The valve processing surface that can rust in the atmosphere should be coated with anti-rust oil to protect it. Outdoor valves must be covered with rain-proof and dust-proof items such as linoleum or tarpaulin. The warehouse where the valves are stored should be kept clean and dry.
(2) Use and maintenance
The purpose of use and maintenance is to extend the life of the valve and ensure reliable opening and closing. Valve stem thread, often rub with valve stem nut, to apply a little yellow dry oil, molybdenum disulfide or graphite powder, play a lubricating role. If the valve is not often opened and closed, it is also necessary to regularly turn the handwheel and add lubricant to the valve stem thread to prevent biting. Outdoor valves, to the valve stem protective cover, to prevent rain, snow, dust and rust. If the valve is mechanical, add lubricating oil to the gearbox on time.
(3) Maintenance of valves in operation
1. Cleaning
The surface of the valve, the trapezoidal thread on the valve stem and valve stem nut, the valve stem nut and the sliding part of the support, as well as the gear, worm gear and other parts, are easy to accumulate a lot of dust, oil and media residue and other stolen goods, which will wear and corrosion the valve. Therefore, it is obviously very important to keep the external and active parts of the valve clean and protect the integrity of the valve paint. The dust on the valve is suitable for brush brushing and compressed air purging; The trapezoidal thread and the stolen goods between the teeth are suitable for scrubbing with rags; The oil and residue on the valve are suitable for steam purging, and even copper wire brushing, until the processing surface and matching surface show metallic luster, and the paint surface shows the color of the paint. There should be a special person in charge of the trap, check at least once per shift, regularly open the wash valve and the plug at the bottom of the trap for washing, or regularly remove the wash, so as not to block the valve.
2. Lubrication of valve
The valve ladder thread, the valve stem nut and the sliding part of the support, the bearing part, the gear and worm gear, the meshing part of the worm and other parts with each other need good lubrication conditions to reduce the friction between each other and avoid mutual wear. Some parts are specially equipped with oil cups or oil nozzles, if damaged or lost during operation, it should be repaired and matched, and the oil circuit should be dredged. The lubricating part should be oiled regularly according to the specific situation. Frequently opened, high temperature valves are suitable for refueling once every week to once a month; The refueling cycle of valves that are not often opened and the temperature is not high can be longer. Lubricants include motor oil, butter, molybdenum disulfide and graphite. High temperature valves are not suitable for oil, butter, they will melt and lose due to high temperature, and suitable for injecting molybdenum disulfide and wiping graphite powder. For the exposed parts that need to be lubricated, such as trapezoidal threads, gears, etc., if butter and other oil grease are used, it is easy to be contaminated with dust, while molybdenum disulfide and graphite powder lubrication is not easy to be contaminated with dust, and the lubrication effect is better than yellow. Graphite powder is not easy to apply directly, can be used a little oil or water mixed paste. The plug valve of the oil filling seal should be filled in accordance with the specified time, otherwise it is easy to wear and leak.
2, long-term storage valve should be regularly checked, remove dirt, and apply anti-rust oil on the processing surface.
3, after installation, should be regularly inspected, the main inspection items:
(1) Sealing surface wear.
(2) The trapezoidal thread wear of the valve stem and valve stem nut.
(3) Whether the packing is outdated and ineffective, if there is damage, it should be replaced in time.
(4) After the valve repair and assembly, the sealing performance test should be carried out.
(1) Storage and maintenance
The purpose of maintenance is not to damage the valve in custody or reduce its quality. In fact, improper storage is one of the important reasons for valve damage. Valve storage, should be well organized, small valves on the shelf, large valves can be neatly arranged on the warehouse floor, can not be stacked in chaos, do not let the flange connection surface contact the ground. This is not only for beauty, mainly to protect the valve from damage. Due to improper storage and handling, the handwheel is broken, the valve stem is distorted, the fixing nut of the handwheel and the valve stem is loose and lost, etc., these unnecessary losses should be avoided. For valves that are not used in the short term, asbestos packing should be removed to avoid electrochemical corrosion and damage to the valve stem. The valve that has just entered the warehouse should be checked. If rain or dirt is entered during transportation, it should be wiped clean and then stored. Valve inlet and outlet should be sealed with wax paper or plastic sheet to prevent dirty things in. The valve processing surface that can rust in the atmosphere should be coated with anti-rust oil to protect it. Outdoor valves must be covered with rain-proof and dust-proof items such as linoleum or tarpaulin. The warehouse where the valves are stored should be kept clean and dry.
(2) Use and maintenance
The purpose of use and maintenance is to extend the life of the valve and ensure reliable opening and closing. Valve stem thread, often rub with valve stem nut, to apply a little yellow dry oil, molybdenum disulfide or graphite powder, play a lubricating role. If the valve is not often opened and closed, it is also necessary to regularly turn the handwheel and add lubricant to the valve stem thread to prevent biting. Outdoor valves, to the valve stem protective cover, to prevent rain, snow, dust and rust. If the valve is mechanical, add lubricating oil to the gearbox on time.
(3) Maintenance of valves in operation
1. Cleaning
The surface of the valve, the trapezoidal thread on the valve stem and valve stem nut, the valve stem nut and the sliding part of the support, as well as the gear, worm gear and other parts, are easy to accumulate a lot of dust, oil and media residue and other stolen goods, which will wear and corrosion the valve. Therefore, it is obviously very important to keep the external and active parts of the valve clean and protect the integrity of the valve paint. The dust on the valve is suitable for brush brushing and compressed air purging; The trapezoidal thread and the stolen goods between the teeth are suitable for scrubbing with rags; The oil and residue on the valve are suitable for steam purging, and even copper wire brushing, until the processing surface and matching surface show metallic luster, and the paint surface shows the color of the paint. There should be a special person in charge of the trap, check at least once per shift, regularly open the wash valve and the plug at the bottom of the trap for washing, or regularly remove the wash, so as not to block the valve.
2. Lubrication of valve
The valve ladder thread, the valve stem nut and the sliding part of the support, the bearing part, the gear and worm gear, the meshing part of the worm and other parts with each other need good lubrication conditions to reduce the friction between each other and avoid mutual wear. Some parts are specially equipped with oil cups or oil nozzles, if damaged or lost during operation, it should be repaired and matched, and the oil circuit should be dredged. The lubricating part should be oiled regularly according to the specific situation. Frequently opened, high temperature valves are suitable for refueling once every week to once a month; The refueling cycle of valves that are not often opened and the temperature is not high can be longer. Lubricants include motor oil, butter, molybdenum disulfide and graphite. High temperature valves are not suitable for oil, butter, they will melt and lose due to high temperature, and suitable for injecting molybdenum disulfide and wiping graphite powder. For the exposed parts that need to be lubricated, such as trapezoidal threads, gears, etc., if butter and other oil grease are used, it is easy to be contaminated with dust, while molybdenum disulfide and graphite powder lubrication is not easy to be contaminated with dust, and the lubrication effect is better than yellow. Graphite powder is not easy to apply directly, can be used a little oil or water mixed paste. The plug valve of the oil filling seal should be filled in accordance with the specified time, otherwise it is easy to wear and leak.
