The original “Anti-Shock” & “Anti-Surge” air release and vacuum break valves for water, sewage, and effluent pipelines in FUSION BONDED EPOXY POWDER COATED ductile iron



Size Range DN25 to DN300mm
Temperature Range -40degC to 85degC
Max. Operating Pressure Up to 1000kPa depending on size
Min. Operating Pressure 50kPa
FlangeConnection ASME B-16.5
Flange Drilling ANSI 150#, ANSI 300#, ANSI 600#
Body Material Fusion Bonded Epoxy Powder Coated Ductile Iron
Flange Material Fusion Bonded Epoxy Powder Coated Ductile Iron
Top Cover Fusion Bonded Epoxy Powder Coated Mild Steel
Float Material High Density Polyethylene (solid)
Bleed Port Yes
O-Rings and Nozzle Seat EPDM

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Features & Benefits

  • High capacity air discharge during pipeline filling
  • High volume air intake for vacuum break purposes, both during draining of water pipelines and/or column separations
  • Independent third-party tested
  • Controlled pressurised air discharge releases air when pipelines are fully-charged
  • Surge relief prevents pipeline bursts during pump trip & rapid pipeline filling
  • NSF61 approved