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Valve shut off the reason and treatment method
Classification: Company News
Dec 10,2024
Valves in the use of the process will often appear some people troubled by the problem, such as the valve is not tight, not tight, what should we do?
In general, if it is not tight, first confirm to see if the valve is closed in place, if it has been closed in place, there is still leakage can not be sealed, then in the inspection of the sealing surface, some of the valve sealing vice is removable, then take it out for grinding, test again, of course, if it is still closed in place, it must be returned to the factory for repair or replacement of valves, so as to avoid affecting the normal valve The use of the valve and the emergence of industrial accidents and other issues.
If the valve is not closed tightly, first of all, you should first find out where the problem occurs, and then according to the corresponding method to solve the problem. Generally, the valve is not closed tightly for the following reasons.
(1) there are impurities stuck in the sealing surface, debris deposited in the bottom of the valve or pad between the valve and the valve seat.
(2) Valve stem threads rust, the valve can not be rotated; (3) Valve threads rust, the valve can not be rotated; (4) Valve threads rust, the valve can not be rotated.
(3) The valve sealing surface is damaged, resulting in leakage of media; (4) The valve is not in the valve.
(4) Valve stem and valve connection is not good, so that the valve and the valve seat skewed can not be tight contact.
Valve off the processing method.
First, there are impurities stuck in the valve sealing surface
Valve sometimes suddenly shut off, may be the valve sealing surface between the impurities stuck, at this time should not be forced to force the closure, the valve should be slightly larger, and then try to close, try again and again, generally can be ruled out, otherwise it should be inspected, the quality of the medium should be kept clean.
Second, the valve stem thread rust
Usually in the open state of the valve, closed by chance, due to the stem threads have been rusted, will also occur off the situation. For this case, you can repeatedly switch the valve a few times, while using a small hammer to hit the bottom of the valve body, that is, the valve can be closed tightly, without the need to grind the valve repair.
Third, the valve sealing surface is damaged
For trying to switch several times and still can not close the case, that is, the sealing surface has been damaged, should be reported for repair; or corrosion, media particles in the scratch damage to the sealing surface, should also be reported for repair.
Fourth, the valve stem and valve connection is not good
Often to the valve stem and stem nut lubricant to ensure that the valve is flexible. To have a set of formal maintenance programme.
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