Air Release Valve

As an Air Release Valve Supplier in Dubai, UAE Valves provides automatic venting solutions designed for water, desalination, wastewater, and cooling networks. Installed at pipeline high points and rising mains, air release valves continuously expel small trapped air pockets and admit large volumes of air during filling or draining. This prevents vacuum collapse, reduces surge, and keeps pipelines operating at full efficiency without operator intervention.

How Air Release Valves Work

Air release valves combine float and orifice mechanisms to manage air safely:

• Small orifice function: Releases trapped air while the line is pressurized, ensuring full-bore liquid flow.
• Large orifice function: Admits or expels bulk air during startup or shutdown, avoiding vacuum conditions and sudden surges.
• Combination designs: Integrate both small and large orifices in a single unit to protect pipelines during steady operation and during filling/emptying.
• Double chamber valves: Use separate chambers for continuous release and high-volume intake/discharge with controlled closing.

Benefits

• Lowers surge risk at starts and stops by controlling air movement
• Prevents vacuum-related damage during draining or power loss
• Improves pump efficiency and meter accuracy by removing air pockets
• Reduces internal corrosion at high points where air may otherwise collect
• Speeds commissioning and routine maintenance with quick, automatic venting
• Spare floats, seals, and repair kits available for maintenance support

Types Offered

• Single Orifice Air Valve – continuous release of small air pockets under pressure, ideal for clean water
• Combination Air Release Valve – integrates small and large orifices for steady venting and bulk air intake
• Double Orifice Air Release Valve – two chambers for continuous venting and high-volume air intake/discharge
• Double Orifice Kinetic Air Valve – large-capacity intake/discharge during filling and draining with controlled closing to limit slam

Industries Served

Our expertise as an Air Release Valve Supplier in Dubai covers:

• Water transmission & distribution – rising mains and high points
• Desalination plants – product water and main headers
• Wastewater networks – rising mains, pumping stations, treatment works
• Power generation & cooling water – condenser and auxiliary cooling circuits
• District cooling & industrial utilities – chilled water, plant headers, long distribution lines
• Petrochemical utilities – process cooling water and seawater intake systems

Technical Specifications

• Size range: DN 25 to DN 300 (1 in to 12 in), depending on type
• Pressure ratings: PN 10, PN 16, PN 25; ASME Class 150 on request
• Temperature range: −10 °C to +80 °C for water service; higher with stainless steel or alloy construction
• End connections: flanged to EN 1092 or ASME B16.5; BSP/NPT threaded on smaller sizes
• Body styles: single-chamber and double-chamber configurations
• Accessories: isolating valve, backflush kit, throttling device, screened outlet, anti-splash diffuser
• Coatings: epoxy to AWWA C550 or project specification

Design Standards

• AWWA C512 – air release, air vacuum, and combination valves
• EN 1074 Part 4 – valves for water supply systems
• ISO 5208 / EN 12266 – pressure and seat leakage testing
• EN 1092 / ASME B16.5 – flanges; ASME B1.20.1 / ISO 7 – threaded ends

Inspection and Testing

• Hydrostatic shell and seat tests to ISO 5208 / EN 12266
• Functional checks of opening and closing pressures for small and large orifices
• Flow/discharge verification on kinetic models to confirm controlled closing
• Coating inspection including dry film thickness and holiday testing where specified
• EN 10204 3.1 or 3.2 material certificates with serialized records, as specified
• Documentation packages available on request (material traceability, hydrotest reports, functional test records, coating reports)
• Third-party inspection available on request

Body and Trim Material Compatibility

Special Features

• Anti-slam devices to control discharge and mitigate surge
• Surge-check modules for controlled closing of large orifices
• Backflush connections for cleaning without removing the valve
• Screened and diffused outlets to reduce spray and prevent insect/debris ingress
• Isolation base valve with drain and vent ports for safe maintenance
• Optional position indicator and pressure taps for monitoring during site checks
• Customisation available for materials, orifice sizing, coatings, and accessories to suit project specifications