High pressure valve material selection

First, the overview of ultra-high pressure valve EHV technology has been widely used in super-hard materials manufacturing, chemical industry, petrochemicals, processing technology, isostatic pressing, ultrahigh hydrostatic extrusion, powder metallurgy, metal forming and geophysics , Geophysics research and other fields. Due to the widespread use of high-pressure technology, the performance of ultra-high pressure VALVES in EHV systems directly affects the reliability, safety, work efficiency and service life of the entire system. In those systems that require frequent pressurization and pressure relief, it is particularly important. The main reasons for the failure of the ultra-high pressure valve are cavitation erosion and erosion wear, and there are many factors that affect cavitation erosion and erosion. They mainly include the mechanical properties of materials, hydrodynamic factors and environmental impact. There are many ways to improve the ability of a valve to resist cavitation and erosion. Second, the ultra-high pressure valve material selection ◆ In order to improve the ability of ultra-high pressure valve erosion wear, usually select the anti-corrosion materials: 1, high hardness materials 2, acid corrosion protection film material 3, yield point, stability Good material 4, high fatigue strength of the material. ◆ In order to extend the life of ultra-high pressure valve, but also consider the working environment. 1, to avoid the valve in the small opening of the work, if the valve opening small lift or opening slow motion, work in a small opening, throttle small gap, serious erosion, appropriate to increase the locking mechanism of the pitch, increase Opening speed and lift, work opening increases, so that the throttle gap, scouring weakened, can improve the service life. 2, to avoid the valve working under high temperature medium, the medium temperature of the valve life is greatly affected, the higher the medium temperature, the shorter the life of the valve, and vice versa longer. Therefore, at the relief valve plus cooling device, but also significantly improve the service life of the valve. 3, under different working pressure, use the corresponding sealing pressure, select the appropriate seal than the pressure, the use of torque wrench lock, or to achieve the valve automatic control, so as to avoid valve wear and tear in the absence of erosion and seat Extruded and damaged. 4, timing filter high-pressure medium and cleaning filters, plus liquid filters to be applied filter. Frequently used, should be shortened cycle. Regularly clean the tank, while replacing the new media, according to the actual work of the equipment can shorten the cleaning and oil change intervals. 5, when installing or replacing the needle valve to be properly cleaned. So as not to bring debris, accelerate the needle valve wear.