河閥的啟閉件是閘板。河板的運動方向與流體方向相蠶直，從而開啟或者關閉閥門。廣泛 適用于石油ft!,火力發電廠、油品、水蒸氣管路上或娜管踣中介質的啟閉皿 The opening and closing parts of gate valve is gate. Motion dirBction of gate is perpendicular to the direction of fluid for opening and closing the valve. It is widely used in petrochemical industry, thermal power plant and the oil or steam pipeline, as an opening and closing device to connect or disconnect the medium in pipeline.