The closure mechanism of the knife gate valve is a specialized disc that moves perpendicular to the fluid flow direction. It is engineered strictly for full-open and full-close operations, and should not be used for flow regulation or throttling. Featuring a compact, one-piece wafer-style structure, the valve is characterized by its small footprint and lightweight design. The completely unobstructed, full-bore flow path effectively prevents medium accumulation and deposition within the valve body, while the integration of a replaceable sealing structure streamlines maintenance procedures and resolves long-standing servicing challenges. Furthermore, in addition to conventional cast steel configurations, the valve body is now newly engineered in premium ductile iron, delivering enhanced corrosion resistance and significantly extending the operational lifespan of the equipment.