FOX 3F Combination air valve

The CSA Mod. FOX 3F is a full bore, single chamber triple function air valve designed to ensure the release of pressurized air during operation, the discharge of large volumes of air during filling, and air intake during draining or pipe bursts, thus preventing vacuum and negative pressure conditions.
The aerodynamic deflector prevents premature closure of the mobile block during filling operations.
Its internal system, with solid polypropylene float and disc, ensures stable operation, precise movement, and high resistance under pressure.
Entirely made of ductile cast iron with stainless steel components and a high-efficiency air release system, FOX 3F is known for its durability, performance, and easy maintenance.

Product features

• Body and cover in ductile cast iron GJS 450-10
• Air release system in AISI 316 stainless steel
• Sealing seat in AISI 304 stainless steel
• Float and disc in solid polypropylene
• Aerodynamic deflector to prevent premature closure
• Easy maintenance from the top without removing the valve
• Epoxy coating RAL 5005 applied by fluidized bed

Working conditions

• Maximum pressure: up to 40 bar
• Minimum pressure: 0.2 bar (lower on request)
• Maximum temperature: 60°C
• Fluid: treated water

Connections

• Flange sizes from DN 50 to DN 300 mm
• Threaded BSP F 1″ – 2″; NPT on request
• Flange drilling according to EN 1092/2, ANSI 150, AS; others on request

Standards

• Design and testing according to EN 1074/4
• Compliant with AWWA C-512
• Available in SUB version with threaded outlet
• Epoxy coating compliant with RAL 5005

• Data sheet
• Water air valves catalogue
• Specification