Air Valves Potable Water - Double Air Valve + BFV Isolation

Air Valves Potable Water - Double Air Valve + BFV Isolation
  • Air valves should be installed with isolation valves to permit allow repairs or inspections to be completed without stopping the system.
  • Wafer lugged Butterfly valves are ideal for this duty as they are retained on the mount flange by the studs fitted through the tapped lugs.
  • The butterfly valve should always be fully open when the air valve is in use
  • Butterfly valve shown is in the closed position.
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Section 4.8