Regulating pneumatic valve questions that exist in the complicated working condition of work analysis < / div >

adjust pneumatic valve operation under complex conditions, can produce serious corrosion, cavitation, erosion, intercepting, scratch, to adjust the pneumatic valve sealing surface will produce severe damage, the regulating pneumatic valve seal is not reliable, seal life short, become a domestic pneumatic valve regulating decades not breached the persistent ailment. Fully functional ultra light regulating pneumatic valve broke through the pneumatic valve after heavy and the function is not complete, we are committed to the complex working condition of seal hard to break.

a, what is a complex condition and the problems caused by the
1, high pressure and large pressure difference - — Serious erosion and cavitation, influence the seal life.
2, high temperature, large temperature difference - — Severe heat bilges cold shrink changed the assembly at room temperature with the nature, cause leakage, serious when intercepting, make difficult, or even be 'stuck'.
3, not clean medium - — Cause serious erosion, intercepting, core scratch, impact action and seal.
4, corrosive medium - — Make contact with the material corrosion damage.
5, Ⅵ hard seal cut off - — Especially large differential pressure cut off, core, must shut tight, at the instant of the open, sealing surface friction and the strain.
above all: in the above mentioned have severe cavitation and erosion, corrosion, expansion shrinkage, intercepting, scratch etc. Bad work environment, Ⅵ hard seal cutting is harder, become the domestic regulating pneumatic valve not breached the persistent ailment in decades.

second, the traditional sealing structure reliability analysis 1) With the soft sealing material soft soft seal - — Easy to seal, because soft materials poor reliability.
2） Soft seal of stainless steel - — Ratio ( 1) Slightly better, but still can't reliable seal.
3） Stainless steel to stainless steel - — Ratio ( 2) Slightly better, but stainless steel hardness is still very low, HRC20～25） , seal is not reliable.
4） Multi-layer seal pneumatic seat - — Stainless steel sheet with overlapping use soft material, the reliability of the seal and the above ( 2) （ 3) About the same, but the heat resistance performance improved.
5） Surfacing welding alloy - — Usually surfacing STELLITE alloy, which is the best sealing material. But it is still not high hardness ( HRC40～45） , still not adapt to the complex conditions of harsh conditions.
6） Ceramic seal - — Hardness is very high, the lack of toughness, brittle crack, even crack before use.