Ground Screw,Earth Screw Post Ground Screw,Solar Mounting Earth Screw Pile,Carbon Steel Solar Ground Screw Taian Longye Import And Export Trade Co.,ltd , https://www.longyedrillingrig.com
When the regulating valve is operated under complicated working conditions, it will cause serious corrosion, cavitation, erosion, jamming and scratching, which will cause serious damage to the sealing surface of the regulating valve, resulting in unreliable sealing of the regulating valve and short sealing life. Regulators have been unstoppable for decades. After the full-featured ultra-light regulating valve breaks through the cumbersome and incomplete function of the regulating valve, we are committed to the breakthrough of difficult sealing in complex working conditions.
1. What is the complex working condition and the problems caused by it?
1, high pressure, large pressure difference - produce serious erosion or cavitation, affecting the seal life.
2, high temperature, large temperature difference - severe thermal expansion and contraction changed the compatibility of the assembly at room temperature, causing leakage, jamming in serious cases, making the operation difficult, and even being "killed."
3, dirty media - causing serious erosion, blockage, core seat scratches, affecting movement and sealing.
4, corrosive medium - causing corrosion damage to the contact material.
5, VI-class hard seal cut-off - especially the large differential pressure cut, the core and the seat must be tightly closed, at the moment of opening, the sealing surface is rubbed and pulled.
In summary: in the severe working environment caused by severe cavitation, erosion, corrosion, expansion and contraction, jamming, scratching, etc., the VI-class hard seal cutting is even more difficult and becomes a domestic adjustment. The chronic disease that the valve has not broken for decades.
Second, the reliability analysis of traditional sealing structure
1) The soft seal is soft to the soft seal material - easy to seal, because the material is soft and reliable.
2) Soft seal to stainless steel - slightly better than (1), but the seal is still not reliable.
3) Stainless steel to stainless steel - slightly better than (2), but the hardness of stainless steel is still very low (HRC 20 ~ 25), the seal is still not reliable.
4) Multi-layer sealing valve seat - stainless steel sheet and soft material overlap, the reliability of the seal is similar to (2) (3) above, but the temperature resistance is improved.
5) Surfacing welding wear-resistant alloy - usually surfacing STELLITE alloy, is currently the best sealing material. However, its hardness is still not high (HRC 40 ~ 45), still not suitable for the harsh conditions of complex conditions.
6) Ceramic seals - extremely high hardness, lack of toughness, brittle fracture, and even no cracking.