Double Orifice Air Release Valve

Double Orifice Air Release Valve is engineered to provide comprehensive pipeline air management by combining both high-capacity bulk air handling and continuous small-pocket air venting into a heavy-duty, dual-chamber assembly. Designed with separate chambers for large and small orifices, this valve protects liquid transmission systems from severe structural damage caused by vacuum formation, air binding, and pressure surges.

During pipeline filling, the large orifice exhausts high volumes of air to prevent air locks; during system shutdown or pump trips, it admits bulk air instantly to prevent pipeline collapse. Concurrently, the small orifice continuously bleeds entrained air pockets under full operating pressure. Ideal for critical water infrastructure, high-pressure distribution mains, power generation cooling lines, and industrial utility networks, the double orifice air release valve ensures maximum hydraulic efficiency and system safety.

Key Features

• Dual-Chamber Air Management: Independent chambers for large-volume air admission/discharge and continuous micro-bubble air venting under pressure.

• Vacuum Collapse Protection: Rapidly draws in large volumes of atmospheric air during sudden pump shutdowns or pipe bursts to neutralize negative pressure.

• Integrated Isolation Valves: Often equipped with built-in isolation valves or stops between chambers to allow maintenance on the small orifice without shutting down the main pipeline.

• Heavy-Duty Construction: Rugged body design engineered to withstand hydraulic shock, water hammer, and high working pressures.

• Dynamic Sealing Geometry: High-density, buoyant floats prevent premature closure during high-velocity air discharge.

Brands We Provide

• SPIRAX SARCO

• SVR GLOBAL

• GESTRA

• NEWAY

• GCC VALVES

Applications

• High-Pressure Municipal Water Transmission Mains

• Raw Water Intake & Distribution Networks

• Pump Station Discharge Lines

• Thermal & Hydroelectric Power Plant Cooling Circuits

• Desalination Plant Piping Systems

• Industrial Process & Utility Infrastructure

Benefits

• Complete Pipeline Protection: Guards against vacuum collapse, surge pressures, and air pocket restrictions in a single installation.

• Optimized Hydraulic Capacity: Eliminates air pockets that reduce cross-sectional pipe area and cause flow resistance.

• Serviceability: Dual-chamber design allows easy field inspection, cleaning, and seat replacement with minimal downtime.

• Pumping Energy Efficiency: Keeps pipelines running at maximum volumetric capacity, lowering overall pump energy costs.

Our Double Orifice Air Release Valves at AustraliaValves.com are manufactured to withstand demanding operational conditions, offering customizable body materials, trim configurations, and pressure ratings tailored for major utility and industrial projects across Australia.

For technical datasheets, sizing calculations, or to request a quote, please contact us.