Low Opening & Closing Resistance ：The curved gate leaf rotates around pivot hinges; the resultant force of water pressure passes through the hinge shaft, so the hoisting force required is much lower than that of flat steel gates.
Excellent Dynamic Water Operation Performance ：Smooth water flow avoids vibration and cavitation. The gate can be opened for flood discharge directly under flowing water conditions.
Superior Discharge Performance ：No gate slot blocks water flow, delivering unobstructed flow cross-section and high flood discharge efficiency.
Anti-Siltation Design： Free of recessed gate slots, so sediment accumulation and gate jamming rarely occur in sediment-laden rivers and reservoirs.
Low Operation Noise： Stable water flow during opening and closing eliminates violent impact and vibration for smooth operation.
Suitable for High Flow Velocity & Large Discharge： Ideal for spillways, flood tunnels and large-opening flood discharge working conditions.
Item | Parameter Description |
Gate Type | Open-top / Submerged Radial Steel Gate |
Clear Design Opening Width | 1m – 20m |
Clear Design Opening Height | 1m – 18m |
Max Operating Water Head | 2m – 80m |
Curvature Radius of Gate Leaf | 1.2 ~ 1.8 times the clear opening height |
Main Steel Materials | Q235B, Q345B, Q355NL |
Supporting Arm Structure | Solid-web Welded Arm / Lattice Welded Arm |
Sealing System | Side rubber seal, bottom rubber seal, top rubber seal |
Rubber Seal Profiles | P-type, L-type, round-head water stop rubber |
Anti-Corrosion Treatment | Sand blasting rust removal + epoxy zinc-rich primer + topcoat spraying |
Lifting Equipment | Winch Hoist / Hydraulic Hoist |
Lifting Stroke | Equal to clear opening height |
Lifting Time | Adjustable from 3 to 15 minutes |
Applicable Water Temperature | 0℃ ~ 40℃ |
Sediment Adaptability | River working condition with sediment concentration ≤ 30kg/m³ |
Designed Service Life | 50 years |
