The CSA surge alleviation, non slam combination automatic air valve Mod. FOX 3F AS will ensure the
proper operation of the pipeline network allowing the release of air pockets during working conditions, the
entrance of large volumes of air during draining operations and pipeline bursts and the controlled air
outflow, to prevent water hammer
Technical features and benefits
Single chamber full bore body in ductile cast iron, PN 40 bar rated, provided with internal ribs for accurate
guiding of the mobile block.
Drainage valve produced by CSA, for chamber control and pressure relief during maintenance.
Mobile block composed of a cylindrical float and upper disk in solid polypropylene, joined together by the
CSA air release system in AISI 316 (patent pending). The solid cylindrical floats, obtained by CNC
machining only, avoid deformations and ensure a great sliding precision inside the body processed ribs
and a perfectly vertical thrust.
Nozzle and gasket holder, part of CSA air release system, entirely made in AISI 316.
Maintenance can be easily performed from the top, without removing the air valve from the pipe.
Anti water hammer system (also called AS function), never in contact with water, obtained by a spring and
shaft in stainless steel, disk with adjustable nozzles for air outflow control.
Cover in ductile and screen in stainless steel as a standard execution, to prevent the entrance of insects,
with optional outlet for submerged applications.
