The cast iron gate valve consists of four parts: valve seat, valve plate, gasket, and hinge.

Pilot valve structure and working principle:
Composed of four parts: valve seat, valve plate, sealing ring, and hinge.
Single-direction circular and square outlets, with a tight structure and reliable operation, requiring no manual operation; the closing force comes from
Water pressure source, opens when the water pressure inside the flap exceeds the pressure outside, and closes otherwise.
Door knock performance:
Applicable Media: Water, River Water, Lake Water, Sea Water, Domestic, Industrial Sewage
Application Range:
Suitable for hydraulic systems, municipal wastewater treatment, urban flood prevention and drainage, sewage treatment plants, waterworks, etc.