Dequn hydraulic bottom-hinged steel flap gate is a cylinder-driven pivoting steel leaf for culverts and outlets. The leaf rotates on a bottom hinge and is pushed or pulled by a hydraulic cylinder, with a reinforced grid back to resist water pressure.
Technical Specifications
| Product Name | Hydraulic Bottom-Hinged Steel Flap Gate |
| Product Category | Steel flap / bottom-hinged hydraulic gate |
| Leaf Material | Welded structural steel |
| Drive System | Hydraulic cylinder (power unit as specified) |
| Hinge Type | Bottom horizontal hinge for pivoting open/close |
| Leaf Structure | Reinforced grid beams on the back of the leaf |
| Typical Use | Culverts, outlets, flood and irrigation control structures |
| Control | Hydraulic power unit with local or remote control options |
| Coating | Industrial anti-corrosion system; ISO 12944 category on request |
| Customization | Opening size, cylinder stroke/thrust, sealing detail, HPU configuration |
| Quotation Mode | Engineered quotation from drawings |
Core selling points
- Pivoting control: Bottom hinge allows the leaf to rotate rather than slide in tall slots.
- Hydraulic force: Cylinder thrust handles heavy leaves and seating loads.
- Reinforced leaf: Grid stiffeners reduce deformation under differential pressure.
- Culvert-friendly: Suited to arched or rectangular outlet chambers.
- Project engineering: Cylinder size and seal layout are matched to site head and opening.
Who this product is for
Municipal and irrigation projects that need powered flap-style control at outlets—especially where a sliding sluice is difficult to install in an existing culvert chamber.
Design and manufacturing focus
The steel leaf is welded with a stiffener grid. A bottom hinge anchors to the civil structure. One or more hydraulic cylinders drive the leaf. Buyers must confirm chamber geometry, hinge elevation, cylinder anchorage, and power unit location.
Compatibility and accessories
- Hydraulic power unit (HPU), hoses, and valves
- Local control panel; remote control optional
- Hinge bearings / pins and sealing parts
- Optional trash rack upstream of the outlet
FAQ
Q1: How is this different from a pipe flap valve?
A: A pipe flap valve usually opens by water differential without power. This gate is a large steel leaf driven by hydraulic cylinders for controlled positioning.
Q2: Can it hold water in both directions?
A: Sealing direction depends on design. Confirm one-way or two-way requirements in the drawings.
Q3: What civil works are needed?
A: Accurate hinge foundation, cylinder anchorage, and chamber clearance for full travel.
Q4: Do you supply the hydraulic power unit?
A: Yes, HPU scope can be included in the package when specified.
Q5: What maintenance is required?
A: Inspect hinge pins, cylinder seals, oil condition, and leaf coating on a planned interval.
Q6: Is it suitable for flood discharge outlets?
A: Yes when sized for the design head and debris conditions. Upstream screening is recommended where trash load is high.
Q7: What files are needed to quote?
A: Chamber drawings, opening size, water levels, preferred cylinder layout, and control requirements.
Q8: Can coating follow ISO 12944?
A: Yes. State the corrosivity category (for example C4/C5) in the purchase order.
How to inquire
Send culvert/outlet drawings, water levels, and control preferences to Export / International Sales. Tel: +86 13903193904.
