Air Release Valves

Air release valves are critical components used to automatically release entrapped air that accumulates at high points within a pipeline. If left unmanaged, pocketed air can restrict fluid flow, cause pressure surges (water hammer), increase energy consumption, and potentially cause pipeline failure.

We supply a comprehensive range of high-performance air valves tailored for various industrial applications:

• Australian Made ARV Series: Our locally manufactured ARV-3N and ARV-4N series are specifically engineered for harsh environments like wastewater, sewerage, and coal seam gas pipelines.
• Dorot Series: Full-bore air release and vacuum break valves designed specifically for potable (drinking) water applications.
• Specialised Models: Including the DAV-MP PN25 Automatic Air Release Valve, the DAV-P BSP Plastic variant, and the DAV-MH 3-Way Operation Ductile Air Valve.

Yes. Wastewater and sewerage systems require specialized valves to handle solids and corrosive gases. Our Australian Made ARV-3N and ARV-4N series, alongside our dedicated AFC Sewer Air Release Valves and Stainless Steel Sewer options, are specifically built to operate reliably in these demanding environments without clogging.

• System Filling: As liquid fills the pipeline, it enters the valve chamber, pushing the float upward to seal the discharge orifice.

• Air Accumulation: Pockets of entrained air naturally travel to high points and enter the valve body, displacing the liquid inside.

• Venting: As the liquid level drops, the internal float sinks, opening the orifice to release the trapped air into the atmosphere.

• Resealing: Once the air escapes, the liquid level rises again, lifting the float to reseal the valve and prevent fluid leaks.

• Air Release Valves: Open when the pipeline is pressurised to continuously vent small pockets of accumulated air.

• Vacuum Break Valves: Open when the pipeline is depressurised (such as during draining or sudden pump shutdowns) to admit large volumes of air, preventing a vacuum from forming.

Note: Combination models like our Dorot Series and DAV-MH range integrate both functions into a single unit, providing dual air release and vacuum relief.

• Prevents Water Hammer & Surges: Eliminating compressed air pockets significantly reduces destructive pressure surges and transient waves that crack pipes.
• Optimises Flow Efficiency: Removing air pockets ensures the pipeline maintains its full hydraulic capacity, preventing air bounds that throttle fluid flow.
• Lowers Energy Costs: Pumps do not have to work twice as hard to push liquid past restrictive air pockets, resulting in lower power consumption.
• Protects Against Pipe Collapse: Vacuum relief functionality ensures thin-walled pipelines do not implode when lines are rapidly drained.