Vacuum Breaker Valves and Irrigation Air Release Valve

Fox 3F AS Anti-Slam Air Release Valve

The CSA Mod. FOX 3F-AS, is a full-bore high-quality single chamber triple function combination air valve with a built-in anti-water hammer non-slam surge prevention system.  The air valve allows the release of air pockets from pressuried pipelines, and admits large volumes of air in the event of pipe draining/burst, to prevent vacuum and negative pressure conditions. The anti-shock mechanism, with adjustable nozzles, will control the air outflow rate, thus avoiding fast approaches of water column with potential sudden closures of the mobile block and the associated risk of water hammer.

Entirely made in ductile cast iron, with air release system and seat in stainless steel, FOX 3F-AS stands out for long-lasting performance and reliability.

View all data sheets & engineering data


Protection of pumping stations with CSA anti-surge air valves Watch video

Protection of pumping stations with CSA anti-surge air valves

  • Adjustable air discharge mechanism for water hammer prevention
  • Low pressure sealing less than 10Kpa (0.9m)
  • Approved to AS4020 drinking water compliance
  • All stainless steel components in contact with water 316SS
  • Available in PN16 and PN35 pressure and flange ratings
Live field support