Metal-seal ball valve | ||||||
source： hits：6440 turnover time：2014-07-07 | ||||||
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| product presentation | ||||||
The metal seal ball valve are suitable for most severe service coditions,and the balls&seats are adopted advanced hardening technology and treatment such as nickel-based alloy,tungsten carbide and chromium carbide spray coating accdording to different service conditions and customer requirements | ||||||
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