... valve-seat extractor 气门座拆卸工具 valve-seat face 气门面 valve-seat grinding machine 气门座研磨机 ...
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No matter how the valve is installed, the back of the upstream seat protects the face of the downstream seat.
无论阀门如何安装，上游阀座的后背都能够保护下游阀座的表面。
Raised-face seat. A groove around the seat collects particles pushed aside by the knife and prevents clogging. When the valve opens, media pressure cleans the groove.
凸面阀座。阀座周围的槽将颗粒收集起来，并排挤到闸刀旁边，以避免出现堵塞。当阀门开启时，流体介质压力就会清洗槽内的颗粒。
Up chamfer, down chamfer and working face must be correctly dressed so that the valve seat can acquire a longer service life.
气门座要获得高的使用寿命就必须对其上、下倒角和工作面进行适当的修整。
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