Soft-seated gate valves, industrial valves; the operating parts of the soft-seated gate valve are the gate plate, which moves perpendicular to the fluid direction. The gate valve can only be fully open or fully closed; it cannot be used for adjustment or throttling. The gate plate has two sealing surfaces, and the two sealing surfaces of the commonly used pattern gate valve form a wedge shape, with the wedge angle varying with the valve parameters. The nominal diameter ranges from DN50 to DN1200, and the operating temperature is ≤200°C.