How to judge whether the valve is internal leakage or external leakage
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Release Time：2019-03-12
In the process of using the valve, there will be some failures. The leakage of the valve is the most common one among the many failures, and the leakage of the valve is generally in two cases: internal leakage and external leakage! The internal leakage of the valve, generally refers to when the valve is completely closed, there is still a medium from the valve flow path outlet outflow, leakage or dripping, etc., popular point of view, is not tight, the seal is not good! The cause of the failure, usually due to the erosion of the medium, or contain impurities and other reasons. Even if the valve screw (valve stem) is tightened in place, there is still a gap between the valve core and the valve body,
In the process of using the valve, there will be some failures. The leakage of the valve is the most common one among the many failures, and the leakage of the valve is generally in two cases: internal leakage and external leakage! So, what is the difference between the two?
The internal leakage of the valve generally refers to when the valve is completely closed, there is still a medium from the valve's flow path outlet outflow, leakage or dripping, etc., popular point of view, is not tightly closed, the seal is not good! The cause of the failure, usually due to the erosion of the medium, or contain impurities and other reasons. Even if the valve screw (valve stem) is tightened in place, the medium can still flow through due to the gap between the valve core and the valve body.
The leakage of the valve, generally refers to when the valve is completely closed or opened, the valve packing of the external sealing parts, the leakage of the medium. That is, between the valve and the connecting flange or connecting thread, the sealing is not tight enough to cause the medium to flow out of the connecting sealing surface, or the medium leakage caused by the poor sealing between the valve stem and the glen (I .e. the gland of the pressure packing on the valve stem), or the external leakage caused by trachoma on the blank of the valve body, and the external leakage caused by the wear of the valve body due to the erosion of the medium.
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