The round-port manual slide valve is a compact and easy-to-operate manual control valve, mainly applied in the conveying pipelines of powder, granular materials or low-viscosity fluids to achieve rapid on-off control and flow regulation of media#圆口手动插板阀是一种结构紧凑、操作便捷的手动控制阀门，核心应用于粉体、颗粒状物料或低粘度流体的输送管路中，实现介质的快速通断与流量调节。