The original “Anti-Shock” & “Anti-Surge” air release and vacuum break valves for water, sewage, and effluent pipelines.



Size Range DN50 to DN300
Temperature Range -40degC to 85degC
Max. Operating Pressure Up to 2500kPa depending on size
Min. Operating Pressure 50kPa
Flange/end Connection MNPT, Flanged/Studded ASME B-16.5
Flange Drilling ANSI 150# & 300#
Body Material Stainless Steel 304L or 316L
Flange Material Stainless Steel 304L or 316L
Top Cover Stainless Steel 304L or 316L
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
  • ARRA, Buy America or PA Steel, American Iron & Steel (AIS), if specified

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