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  1. Wonlek Chua

    Metal seated ball valve with tungsten carbide coating - lapping procedure

    Hi, we have a 12" tungsten carbide coated ball valve here for servicing. ball condition is fine as it has only minimal use on site. So we start lapping to the ball on machine. I would like to ask: - what is the lapping sequence for achieve good sealing? I am thinking: machine lapping to bring...

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