In the daily use of the valve, often encounter a variety of failures, valve leakage is the most common one of the many failures, and the leakage of the valve generally have two kinds of internal leakage and leakage! So what is the difference between the two?
Valve leakage, generally refers to the valve is completely closed, there is still medium flow from the valve outlet outlet, leakage or drip, etc., popular point, it is not strict, the seal is not good! The reason for the failure, usually due to erosion of the media wear and tear, or impurities and other causes. Even if the valve screw (valve stem) is screwed in place, the media can flow through the gap between the valve plug and the valve body.
Valve leakage, generally refers to the valve when the valve is completely closed or open, the valve packing external seal components, there media leakage. That is between the valve and the connecting flange or connecting thread, the seal is not tight, which leads to the media out of the connecting sealing surface, or the valve stem and the Glan (that is, the valve stem pressure gland) between the tight seal caused by media leakage , Or there is a trachoma body caused by external leakage of trachoma, as well as erosion caused by erosion of the valve body caused by external leakage.
