Combination Air Release Valve Manufacturer in Italy – Valvesonly Europe 

Valvesonly Europe is a trusted Combination Air Release Valve Manufacturer in Italy. Our valves are engineered to automatically release large volumes of air during pipeline filling and small residual air during operation. Built to EN and AWWA standards, they protect pipelines, improve efficiency, and extend system life. 

Function & Working 

Equipped with two orifices, these valves expel trapped air and prevent vacuum formation during filling, operation, and draining. 

Advantages 

  • Prevents air locking 
  • Improves pump efficiency 
  • Reduces surge and vibrations 
  • Automatic continuous operation 
  • Corrosion-resistant float design 

Applications / Industries Served 

  • Water networks 
  • Irrigation 
  • Wastewater treatment 
  • Pumping stations 
  • Hydropower & desalination 

Materials 

Component  Material Options  Standards / Grades  Typical Use 
Body  Ductile Iron, WCB, Stainless Steel  EN-GJS-400, ASTM A216, A351  Water & wastewater 
Float  Stainless Steel, Polypropylene  AISI 304, AISI 316  Long life, corrosion resistance 
Seat  EPDM, NBR, PTFE  –  Tight sealing 
Cover  Cast Iron, Stainless Steel  ASTM A216, A351  Durability 

Technical Specifications 

  • Design Standards: EN 1074-4, AWWA C512 
  • Size Range: DN50 – DN300 
  • Pressure Ratings: PN10 – PN40 
  • End Connections: Flanged EN 1092-1 / ASME B16.5 
  • Operation: Automatic air release 
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