Flap Check Valve is a non-return valve designed to prevent backflow in water and utility pipelines. It operates automatically using a rubber-lined flap, which opens with forward flow and closes immediately when flow reverses.
Flap Check Valves are preferred in low-pressure and gravity flow systems due to their low head loss, simple design, and maintenance-free operation.
Key Functions
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Prevents reverse flow and protects pipelines
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Provides tight shut-off with rubber-lined flap
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Low pressure drop compared to swing check valves
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Suitable for horizontal or vertical installation
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Silent operation with minimal water hammer
Design & Testing Standards
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EN 1074-3
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ASME B16.34
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API 598 – Pressure & seat leakage testing
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ISO 9001 – Quality Management
Applications
Flap Check Valves are widely used in:
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Water distribution networks
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Sewage & wastewater pipelines
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Drainage and stormwater systems
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Pump discharge lines
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Desalination and water treatment plants
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District cooling and utility pipelines
GCC Valves – Product Assurance
GCC Valves supplies high-quality Flap Check Valves meeting the QA/QC requirements of major GCC utilities and EPC contractors.
We provide:
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EN 10204 3.1 Material Test Certificates
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Hydrostatic & functional test reports
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Datasheets and GA drawings
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Complete QA/QC documentation packages
(ITP, coating certificates, inspection reports)
Our Flap Check Valves are sourced from certified manufacturers in Europe, India, and China, compliant with project specifications used by SWCC, NWC, ARAMCO, ADNOC, SABIC, MARAFIQ, and BAPCO. For fittings check our MiddleEastPiping.com
| Technical Parameter | Standard Specifications & Capabilities |
|---|---|
| Valve Profile & Mechanics | Flap Check Valve / Swing Type Non-Return Valve (Automatic backflow prevention via single or dual-plate pivoting flap disc) |
| Nominal Size Range | DN50 to DN600 (2” to 24”) — Custom heavy-bore profiles engineered up to DN1200 upon project command |
| Pressure Design Ratings | PN10 / PN16 / PN25 / Class 125 / Class 150 |
| Body & Bonnet Metallurgy | Ductile Iron (EN-GJS-500-7 / ASTM A536 Gr. 65-45-12), Cast Carbon Steel (WCB), Stainless Steel (CF8 / CF8M) |
| Flap Disc & Trim Assembly | Ductile Iron core encapsulated in EPDM/NBR, or solid Stainless Steel (SS304/SS316) with resilient or robust metal-to-metal seating |
| Pipeline Connections | Flanged Ends conforming to EN 1092-2, ASME B16.1, and ASME B16.42 layouts |
| Corrosion Barrier Protection | Internal and External Fusion Bonded Epoxy (FBE) Coating, minimum 250–300 microns DFT; non-toxic WRAS potable water options active |
| Design & Manufacturing | BS EN 1074-3, BS 5153, AWWA C508 compliance parameters |
| Testing Standards Met | API 598 / EN 12266-1 Hydrostatic shell test, high/low pressure seat closure leak checks |
| Quality Tracking Traceability | EN 10204 3.1 Mill Test Certificates (MTC), certified hydrostatic pressure charts, and full dimensional GA validation sheets |
| Regional Asset Approvals | Fully integrated for utility installations managed by SWCC, NWC, Saudi Aramco, ADNOC, SABIC, MARAFIQ, and BAPCO Energies |
