NETWORK PROTECTION VANADOUR® AIR VALVE Types - Dimensions (acc to type) DN 15 to 100 DN 40 to 300 Materials Bronze Cast iron Temperatures (acc to type) - 10°C to 120°C Principle Prevents possibility of accidental backflow Pressions (acc to type) 10 - 16 - 25 bar Class 125 Applications Pumping station - Water treatment - All industries - Building