Overview of high pressure pneumatic valve and material selection

overview of a pneumatic valve, high pressure

the superhigh pressure technology has been widely used in petroleum chemical industry, chemical industry, such as static pressure processing, processing technology, superhard materials, ultra-high static pressure extruding, powder metallurgy, metal forming, geophysical and geological science research, etc. Due to the wide use of high pressure technology, ultra-high pressure system in the ultrahigh pressure pneumatic valve performance directly affect the safety of the whole system work, reliability, efficiency and service life. In those must frequently supercharging pressure relief system, is particularly important.
superpressure pneumatic valves, was the main failure cause of cavitation and erosion wear, and there are many influence factors of cavitation and erosion, the main factors have the material mechanical properties, fluid mechanics and environmental impact. To improve the pneumatic valve cavitation and erosion wear resistance ability, can use many methods.

2, high-pressure pneumatic valve material selection of

in order to improve ultrahigh pressure pneumatic valve of erosion wear resistance, usually choose corrosion resistant materials:
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high hardness of materials, high fatigue strength of materials.
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high yield point, stability good material, acid corrosion protective film material

in order to prolong the service life of high-pressure pneumatic valve, consider the working environment.
and installing or replacing needle pneumatic valve to the proper cleaning. To avoid into sundry, accelerate needle pneumatic valve wear.
and avoid pneumatic valve working under high temperature and medium, medium temperature had a great influence on the service life of pneumatic valves, medium temperature is higher, the shorter the life of a pneumatic valve, the longer the vice. So in unloading pneumatic valve in cooling device, also can obviously improve the service life of pneumatic valve.
work under small open degree, avoid pneumatic valve, pneumatic valve needle lift small open or open slow, work in a small open degrees throttling small gap, serious erosion, appropriately increase the pitch of locking mechanism, enlarging the opening speed and lift, increases the job opening, make the throttle gap is big, scour is abate, can improve the service life.
, timing filtering medium and high-pressure cleaning filter, filter for filtering liquid to application. Often when using, should be appropriate to shorten the cycle. Regular cleaning tank, replace the new medium at the same time, according to the actual situation of equipment work can shorten the cleaning and oil change period.
, under different working pressure, using the corresponding pressure sealing, choose suitable sealing pressure, using a torque wrench to tighten, or implement automatic control of pneumatic valves, so avoid pneumatic valve needle with pneumatic seat extrusion when not subjected to erosion wear and damage.