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Z41H
ZJFV
In low-temperature environments, the maintenance and upkeep of low-temperature steel valves require attention to the following special aspects:
1. * * Regular inspection * *: Check whether the sealing surface of the valve is worn, cracked, or corroded, and whether the valve stem thread is loose, corroded, or worn. If any problems are found, the sealing material should be replaced or repaired in a timely manner.
2. Lubrication: Regularly add lubricating oil to the valve bearing parts to ensure smooth operation of the valve. Especially in low-temperature environments, the selection of lubricating grease is particularly important, and lubricating grease suitable for low-temperature environments should be chosen.
3. * * Cleaning * *: Keep the inside of the valve clean, regularly clean the flow channels inside the valve, remove debris such as dust and sediment, and prevent blockage and wear.
4. Valve stem protection: When designing the gap between the valve stem and the extended neck of the valve cover, consideration should be given to reducing flow heat loss. The valve stem should be able to transmit the necessary operating force to the valve closing component and withstand the additional stress of the operating load.
5. Packing and Sealing: Check if the packing is outdated or ineffective, and replace it promptly if it is damaged. For low-temperature valves, the selection of packing boxes and sealing materials should be suitable for low-temperature environments to prevent a decrease in sealing performance due to temperature changes.
6. * * Prevent freezing * *: In low-temperature environments, incomplete heating at the valve or water ingress at the valve packing may cause freezing. Therefore, it should be ensured that the valve insulation measures are appropriate to prevent moisture from entering the valve.
7. * * Material Selection * *: The material selection for low-temperature valves should be suitable for low-temperature environments. The materials of valve body, valve cover, valve stem and other components should have good low-temperature performance to prevent brittle fracture at low temperatures.
8. * * Operating precautions * *: When operating low-temperature valves, they should be slowly opened and closed to avoid damage to the valve or pipeline due to thermal shock caused by rapid operation.
9. Maintenance cycle: Based on the usage environment and frequency of the valve, a reasonable maintenance cycle should be developed. For special valves with high temperature, high pressure, toxic and harmful media, the maintenance cycle should be determined according to the actual situation.
10. * * Compliance with Standards * *: During maintenance and upkeep, relevant national standards such as "Technical Conditions for Low Temperature Valves" (GB/T 24925-2019) should be followed to ensure that the maintenance and upkeep of the valve meets the standard requirements.
Through the above measures, the reliability and safety of low-temperature steel valves in low-temperature environments can be ensured, and their service life can be extended.
In low-temperature environments, the maintenance and upkeep of low-temperature steel valves require attention to the following special aspects:
1. * * Regular inspection * *: Check whether the sealing surface of the valve is worn, cracked, or corroded, and whether the valve stem thread is loose, corroded, or worn. If any problems are found, the sealing material should be replaced or repaired in a timely manner.
2. Lubrication: Regularly add lubricating oil to the valve bearing parts to ensure smooth operation of the valve. Especially in low-temperature environments, the selection of lubricating grease is particularly important, and lubricating grease suitable for low-temperature environments should be chosen.
3. * * Cleaning * *: Keep the inside of the valve clean, regularly clean the flow channels inside the valve, remove debris such as dust and sediment, and prevent blockage and wear.
4. Valve stem protection: When designing the gap between the valve stem and the extended neck of the valve cover, consideration should be given to reducing flow heat loss. The valve stem should be able to transmit the necessary operating force to the valve closing component and withstand the additional stress of the operating load.
5. Packing and Sealing: Check if the packing is outdated or ineffective, and replace it promptly if it is damaged. For low-temperature valves, the selection of packing boxes and sealing materials should be suitable for low-temperature environments to prevent a decrease in sealing performance due to temperature changes.
6. * * Prevent freezing * *: In low-temperature environments, incomplete heating at the valve or water ingress at the valve packing may cause freezing. Therefore, it should be ensured that the valve insulation measures are appropriate to prevent moisture from entering the valve.
7. * * Material Selection * *: The material selection for low-temperature valves should be suitable for low-temperature environments. The materials of valve body, valve cover, valve stem and other components should have good low-temperature performance to prevent brittle fracture at low temperatures.
8. * * Operating precautions * *: When operating low-temperature valves, they should be slowly opened and closed to avoid damage to the valve or pipeline due to thermal shock caused by rapid operation.
9. Maintenance cycle: Based on the usage environment and frequency of the valve, a reasonable maintenance cycle should be developed. For special valves with high temperature, high pressure, toxic and harmful media, the maintenance cycle should be determined according to the actual situation.
10. * * Compliance with Standards * *: During maintenance and upkeep, relevant national standards such as "Technical Conditions for Low Temperature Valves" (GB/T 24925-2019) should be followed to ensure that the maintenance and upkeep of the valve meets the standard requirements.
Through the above measures, the reliability and safety of low-temperature steel valves in low-temperature environments can be ensured, and their service life can be extended.
