Valve sealing performance requirements,to prevent leakage point of departure.According to the different parts of the leak and the degree of leakage caused by different valves,therefore,need to propose different leak-proof measures.First,the principle of valve sealing
Sealing is to prevent leakage,then the principle of valve sealing is to prevent leakage from the study.Leakage caused by two main factors,one is the most important factor affecting the sealing performance,that is,there is a gap between the sealing pair,and the other is the pressure difference between the two sides of the sealing pair.Valve sealing principle is also from the liquid tightness,gas tightness,leakage of the sealing principle of the valve and the valve seal from four aspects to analyze.
1,liquid tightness
Liquid tightness is achieved by the viscosity and surface tension of the liquid.When the leaking capillary is filled with gas,the surface tension may repel the liquid or introduce the liquid into the capillary.This creates a tangent angle.When the tangent angle is less than 90°,liquid will be injected into the capillary,which will leak.The reason for the leak is the different nature of the media.
