Close the flapper valve
The Close the Flapper Valve (also known as a Flapper Check Valve / Flap Valve) is a reliable flow control valve designed to prevent backflow and ensure one-way fluid movement in pipeline systems. With a simple flap-disc structure, the valve automatically opens under forward flow pressure and closes quickly when reverse flow occurs.
Featuring low flow resistance, excellent sealing performance, easy maintenance, and strong durability, the flapper valve is widely used in water, wastewater, drainage, irrigation, and industrial pipeline systems. The optimized flap design provides stable operation, minimizes pressure loss, and protects equipment from reverse flow damage.
Our flapper valves are manufactured with advanced production technology, strict quality control, and complete valve industry certifications, ensuring reliable performance and long service life for global industrial applications.
Close the flapper valve
We provide professional OEM and ODM customization services to meet different application requirements, including:
We have a complete quality management system and full valve industry certifications, ensuring product quality, safety, and compliance with international standards.
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | Flapper Valve / Flap Valve |
| Valve Type | Check Valve / Non-Return Valve |
| Operation Method | Automatic Flow Control |
| Application Medium | Water, Wastewater, Air, Oil, Industrial Fluids |
| Nominal Diameter | DN50 – DN2000 (Customized Available) |
| Pressure Rating | PN10 – PN40 / Class 150–300 (Customized) |
| Operating Temperature | -20℃ to +200℃ (Customized Available) |
| Valve Body Material | Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel |
| Flap Material | Stainless Steel / Carbon Steel / Rubber Lined / Alloy Material |
| Shaft Material | Stainless Steel / Alloy Steel |
| Sealing Material | EPDM / NBR / PTFE / Metal Seal |
| Connection Type | Flange / Wafer / Thread / Customized |
| Flow Direction | One-Way Flow |
| Closing Method | Automatic Flap Closing |
| Leakage Performance | Reliable Sealing / Low Leakage Design |
| Installation Position | Horizontal or Vertical Installation |
| Pressure Loss | Low Flow Resistance Design |
| Surface Treatment | Epoxy Coating / Anti-corrosion Treatment |
| Maintenance | Simple Structure, Easy Maintenance |
| Testing Standard | Pressure Test & Leakage Test |
| Certification | CE, ISO Quality System, Valve Industry Related Certifications |
| OEM Service | Available |
Industry Applications
Flapper valves are widely used in various industries and systems, including:
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
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