There are several reasons why a manual plug valve is not closing properly:
Improper operation:The operator did not close the plug completely, or did not tighten the handle of the plug, resulting in the valve not closing properly.
Plug valve seal face wear:After long-term use, the sealing surface of the plug valve may be worn or damaged, resulting in the valve not being closed properly and unable to achieve a good sealing effect.
Spring failure:Plug valves are usually equipped with springs that are used to close the valve in place and provide sealing force. If the spring fails or is damaged, the valve may not close properly.
Sediment clogging:During use, some sediments may accumulate in the pipeline, such as particulate matter, sludge, etc., which may clog the sealing surface of the plug valve, resulting in the valve not closing properly.
Loose valve:The internal parts of the plug may come loose, causing the valve to close incorrectly. This can be caused by long-term use or vibration.
For the problem that the manual plug valve is not closed in place, it can be solved by the following methods:
Re-operation:Check that the valve is completely closed, and if it is not closed in place, close the valve again, making sure the handle is tightened.
Replace the sealing surface:If the sealing surface of the plug valve is worn or damaged, consider replacing it with a new one to restore the sealing performance of the valve.
Replace the spring:If the valve's spring fails or is damaged, try replacing it with a new one to ensure that the valve can close in place and provide a good seal.
Clean Pipes:If the valve does not close properly due to a blockage of sediment in the pipe, the pipe can be cleaned to remove the sediment so that the valve can close completely.
Adjust valve tightness:If the valve is loose and the closure is not in place, the valve can be adjusted and the internal parts can be tightened to ensure that the valve can be completely closed.
The above is a summary of the reasons and solutions for the failure of the manual plug valve to close in place, and the specific measures should be adjusted according to the actual situation. If the problem persists, Detersen recommends consulting a professional valve repairer for overhaul.
Fujian Detersen valve***