Cast Iron Square Flap Gate Valve for Drainage Systems
This specialized valve, known as a Cast Iron Drainage Square Flap Gate Valve, is a passive, one-way valve designed for critical use in stormwater, wastewater, and general drainage systems. Its square shape and robust construction make it ideal for installations in concrete channels and culverts.
Key Features and Function
- Structure: Square Flap Gate Valve with a metal seal. It consists of a rigid cast iron body and a hinged flap (disc) that covers the opening.
- Material: Cast Iron (Ensures durability and corrosion resistance in submerged and drainage environments).
- Operation: Automatic (Automatic power). It is a passive device that relies entirely on differential fluid pressure:
- It opens when the water level/pressure on the upstream (pipe/channel) side exceeds the level/pressure on the downstream (receiving body) side.
- It closes automatically due to gravity and/or back pressure when flow ceases or reverses, preventing backflow (e.g., from high tides or flooding).
- Function: Non-return/Overflow control in drainage and sewage systems.
- Customization: Offers customized support (OEM, ODM, OBM), allowing adaptation to specific drainage channel dimensions and pressure requirements.
Technical Specifications
| Parameter | Specification |
| Product Name | Metal Seal Cast Iron Drainage Square Flap Gate Valve |
| Flap Valve Type | Square Flap Gate |
| Applicable Media | Water (Drainage, Sewage, Stormwater) |
| Port Size Range | 400mm to mm (Large sizes for major drainage channels/outfalls) |
| Temperature of Media | Normal Temperature |
| Connection | Designed for installation in concrete walls or pipe ends. |
| Weight Range | 200kg to 1550kg (Reflecting the large size and heavy Cast Iron construction) |
| Warranty | 1 Year |
| Certification | API/ISO/CE |
Application and Installation
The square shape of this flap valve makes it particularly suitable for:
- Concrete Culverts: Installed at the discharge end of rectangular or square concrete drainage tunnels.
- Seawalls/River Banks: Used as outfall gates where drainage systems meet bodies of water subject to tides or fluctuating levels, offering protection against reverse flow and flooding.
- Wastewater Outfalls: Protecting treatment facilities from backflow.
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