An industrial sealed gate valve is installed at the bottom, allowing instant opening and closing, intermittent discharging and repeated start-stop operations to achieve precise split feeding, different from one-time funnel discharging. The gate valve boasts superior sealing performance; when closed, it fully blocks dust, powder leakage, moisture and material contamination, keeping the workshop dust-free and clean. The valve opens and closes smoothly, featuring wear and corrosion resistance with rare jamming failures, supporting tens of thousands of opening-closing cycles. The joint between the bag and gate valve is reinforced and sealed to eliminate dead-angle leakage, meeting high-standard production requirements for clean workshops.