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。