A.R.I. D-23 is a reduced bore, Combination Air Valve installed on wastewater transmission systems. The Air Valve is designed to improve hydraulic operation by protecting the pipeline, increasing pipeline efficiency, and reducing energy requirements. The unique body shape of the valve, enables a continuous air gap that separates the wastewater from the sealing mechanism and helps to avoid deposits or blockage.
Size Unit
Size range
Pressure rating
Working pressure range
A.R.I. D-23 3”
0.02 - 10 bar, 0.1 - 16 barA.R.I. D-23 4”
0.02 - 10 bar, 0.2 - 16 bar, 0.2 - 25 barA.R.I. D-23 6”- 8"
0.1 - 16 barWorking temperature
Maximum working temperature:
60° CMaximum intermittent temperature:
90° CAvailable construction materials
Reinforced Nylon, Stainless Steel, Cast Steel
End connection type
Threaded BSP/NPT or flanged ends to meet various requested standards
Optional add-on components
One-way Out – allows for air discharge only, prevents air intake.
One-way In – allows air intake only, not allowing air discharge.
Non-slam – discharge-throttling attachment, allows full air intake, throttles air discharge.
A.R.I. D-23
A.R.I. D-23 NS
A.R.I. D-23
A.R.I. D-23 NS
