The steam control valve cannot be fully closed – how to deal with it
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The leakage volume is too high; how to deal with it?
First, check to make sure everything is completely turned off; otherwise, disassemble it for inspection
1. Increase the flow rate to see if there are any impurities blocking the valve core. 2. Check whether the control valve is set to its lowest position, and whether it can be adjusted further downward. 3. If that doesn’t work, disassembly is the only option
Leaks in steam control valves are inevitable; large temperature fluctuations cause the gap between the valve plates to increase, resulting in a failure to maintain a proper seal. Another issue relates to automatic control valves, which are constantly attempting to self-repair and thus cannot be closed properly, as the actuator does not match the valve
1. What was the original leakage level? 2. Steam parameters. 3. Instructions for taking photos. 4. Duration of valve use. 5. Material of the valve core and seat. 6. Does the valve operate properly? 7. Has it been adjusted, for example, is the sealing preload sufficient?
If the leakage is minor, try adjusting the limit switch; if the leakage is severe, it’s likely that the valve internals are damaged – remove them for inspection. Temporarily close the shut-off valves at both ends of the control valve and use a bypass valve instead. It's just my personal opinion; please don’t criticize if you don’t agree, thanks
In this case, first adjust the valve to see how it performs; if that doesn’t work, the valve needs to be disassembled to check whether there is foreign matter stuck in it or if the sealing surface of the valve core has suffered from cavitation.
Can’t be closed properly, high leakage rate, faulty valve, poor-sealing valve, the seal isn’t tight. . . Go change the valve and the anus. Identification completed. :lol
You can try self-tuning through the locator