Fox 3 RFP Rapid Filling Preventer

The CSA Mod. FOX 3F-RFP, is a full-bore high-quality single chamber double 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 pressurised pipelines and admits large volumes of air in the event of pipe draining or burst, to prevent vacuum and negative pressure conditions.

During outflow the air valves sense the increase in air velocity and differential pressure, using—if required by excessive values—the RFP (anti-surge) flat to control the air outflow rate thus avoiding fast approaches of water column with potential sudden closures of the mobile block and the risk of water hammer.

AS4956 approved, WSAA appraised