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Regulating valve running in complex conditions, will have serious corrosion, cavitation, erosion, blocking, scratching, valve sealing surface will have a serious damage, resulting in unreliable regulating valve seal, seal life is short, a domestic Regulating valve decades did not break the chronic disease. Full-featured ultra-light control valve broke through the regulatory valve cumbersome and functional problems, we are committed to sealing difficult conditions difficult breakthrough. First, what is the complex conditions and the problems caused by 1, high pressure, large pressure - have a serious erosion or cavitation, affecting the seal life. 2, high temperature, large temperature difference - severe thermal expansion and contraction changed at room temperature with the nature of the assembly, resulting in leakage, blocking the card in serious cases, so difficult to move, or even "stuck." 3, not clean media - causing serious erosion, blocking, core scratches, affecting the action and seal. 4, corrosive media - the contact material to cause corrosion damage. 5, â…¥ level hard seal cut off - especially large pressure cut off, core, seat must be closed tight, open the moment, the sealing surface friction and was injured. In summary: In the above-mentioned serious cavitation, erosion, corrosion, expansion and contraction, blocking cards, scratches and other harsh working conditions, â…¥ level hard seal cut even more difficult to become a regulator Valves have not broken the chronic disease in decades. Second, the reliability of the traditional seal structure 1) Soft seal soft seal material - easy to seal, due to poor material soft reliability. 2) Soft seal to stainless steel - slightly better than (1), but seal still unreliable. 3) Stainless Steel vs Stainless Steel - Slightly better than (2), but the hardness of stainless steel is still low (HRC 20-25) and the seal is still not reliable. 4) Multi-layer sealing seat - stainless steel sheet and soft material overlap, the reliability of sealing and (2) (3) above, but the temperature resistance has improved. 5) surfacing wear-resistant alloy - usually surfacing STELLITE alloy, is the best sealing material. But its hardness is still not high (HRC40 ~ 45), still not suitable for the harsh conditions of complex conditions. 6) Ceramic Seals - High hardness, lack of toughness, easy to crack, even without first crack.
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