Double Orifice Air Release Valve is designed to efficiently manage air in pressurized pipeline systems by performing two critical air-handling functions within a single valve body. It releases large volumes of air during pipeline filling and admits air during draining, while continuously discharging small pockets of entrapped air under normal operating conditions.
The large orifice allows rapid air discharge and intake during pipeline filling and emptying, preventing vacuum formation and protecting pipelines from collapse. The small orifice automatically releases accumulated air during normal operation, reducing air pockets that cause flow restriction, pressure loss, vibration, and water hammer.
Double Orifice Air Release Valve supplied by GCC Valves are widely used in water transmission lines, pumping stations, irrigation networks, district cooling systems, and utility pipelines across KSA, UAE, and the wider GCC region. Their robust design ensures reliable operation under fluctuating pressures and demanding site conditions commonly encountered in regional infrastructure projects.
By maintaining optimal hydraulic conditions, these valves improve pipeline efficiency, reduce energy consumption, and enhance system reliability. Properly installed at high points in the pipeline, Double Orifice Air Release Valves play a vital role in extending pipeline service life and ensuring safe, uninterrupted operation.
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| Technical Parameter | Standard Specifications & Capabilities |
|---|---|
| Valve Profile & Mechanism | Double Orifice Combination Air Valve (Large orifice kinetic air release/vacuum breaker + small orifice automatic pressurized air release) |
| Nominal Size Range | DN25 to DN200 (1” to 8”) — Larger bore dimensions available upon specific engineering request |
| Working Pressure Design | PN10 / PN16 / PN25 |
| Body & Bonnet Metallurgy | Ductile Iron (EN-GJS-500-7 / ASTM A536 Gr. 65-45-12); Cast Carbon Steel or Stainless Steel body configurations optional |
| Float Mechanism & Trim | Stainless Steel AISI 304 / AISI 316 Float Balls / High-durability corrosion-free engineered polymers |
| Sealing Resiliency | High-grade EPDM / NBR Resilient Seats ensuring tight shut-off even under low pipeline system pressure |
| Pipeline Connections | Flanged Ends conforming to EN 1092-2 and ASME B16.1 specifications (Threaded inlet options on request for small sizes) |
| Corrosion Barrier Coating | Internal and External Fusion Bonded Epoxy (FBE) Coating, minimum 250–300 microns DFT; non-toxic WRAS potable water options active |
| Design Standards Met | EN 1074-4 (Valves for water supply requirements — Air release specifications) |
| Testing Standards | EN 12266 Pressure testing and diagnostic operational integrity verification |
| Quality Tracking Traceability | EN 10204 3.1 Mill Test Certificates (MTC), hydrostatic pressure test logs, GA drawing validation sets |
| Regional Project Compliance | Sourced for full integration into municipal water lines belonging to SWCC, NWC, MARAFIQ, Saudi Aramco, ADNOC, SABIC, and BAPCO Energies |
