Air Vent Valve

Automatic air release valves for eliminating trapped air in closed piping systems. Essential for maintaining flow efficiency and preventing air lock in water supply and HVAC applications.

Characteristics

  • Automatically releases trapped air from pipelines to ensure smooth system operation.
  • Precision float mechanism provides reliable and maintenance-friendly performance.
  • Durable metal body with excellent corrosion resistance for long-term use.
  • Leak-proof sealing design minimizes fluid loss and maintains system pressure.
  • Helps prevent pump cavitation, flow interruption, and measurement errors.
  • Reduces water hammer and protects piping systems from pressure surges.
  • Suitable for water supply, HVAC, irrigation, and industrial process applications.
  • Compact structure allows easy installation and long service life.

Technical Specifications

Parameter Specification
Design Standard AWWA C512 / ISO 20480
Test Standard BS EN 12266 / GB/T 13927
Flange Standard BS EN 1092-2
Nominal Diameter DN25, DN50, DN80, DN100 (inlet)
Nominal Pressure PN16
Work Temperature -10°C ~ 80°C
Applicable Media Water, treated water
Body Material Ductile Iron QT450/SS304 / SS316
Float Material Stainless Steel SS304
Seal Material EPDM / NBR
Orifice Size 1.6 mm (micro) / 3.2 mm (standard) / 5.0 mm (high capacity)
Air Release Capacity Up to 0.5 m³/min (at 6 bar)
Surface Treatment Epoxy powder

 

Key Features

  • Automatic continuous air release during pipeline operation — no manual intervention needed
  • Combination type: large orifice for initial air venting + small orifice for continuous degassing
  • Compact design with small footprint — easy to install at pipeline high points
  • Stainless steel float mechanism — corrosion resistant, long service life
  • Anti-slam design prevents sudden closure and water hammer
  • Integrated shutoff valve allows maintenance without system shutdown
  • Self-cleaning orifice design minimizes clogging from debris
  • Compliant with AWWA C512 for drinking water applications

 

Available Models

Model Description
Combination Air Valve (Double Orifice) DN50~DN100 · Large + small orifice · Full pipeline protection
Single Air Release Valve DN25~DN50 · Micro orifice only · Continuous degassing
Kinetic Air/Vacuum Valve DN50~DN200 · Large orifice · Pipeline filling & draining
Wastewater Air Valve DN50~DN100 · Non-clog design · Sludge & wastewater compatible

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