Four function automatic air valve with fast filling prevention system figure FOX 3F RFP C

The FOX 3F-RFP C model is a high-performance single-chamber full bore automatic combination air valve, featuring an integrated fast-filling prevention system. It enables the release of air pockets under pressure during operation and allows the intake of large volumes of air during pipeline draining or bursting, preventing negative pressure. When air discharges at high speed and differential pressure increases, the anti-surge RFP disk closes, reducing the outflow and avoiding a sudden mobile block closure that could cause water hammer. Fully made of ductile cast iron with a stainless steel air release system and sealing seat, FOX 3F-RFP C stands out for its reliability and durability.

Features

Body and cover in ductile cast iron GJS 450-10.

Stainless steel air release system.

Stainless steel sealing seat.

Solid polypropylene float.

Integrated anti-surge system.

Epoxy coating RAL 5005 applied by fluidized bed.

Operating conditions

Pressure: 10-16-25-40 bar.

Minimum pressure: 0.2 bar.

Treated water up to 60°C. Higher values on request.

Connections

Flanged sizes from DN 50 to DN 250 mm.

Flanges according to EN 1092/2, ANSI 150, AS. Others on request.

BSP F 1″–2″ thread; NPT on request.

Standards

Designed and tested according to EN 1074, AWWA C-512, AS 4956, AS 4020, WRAS.