This Appraisal is for a range of CSA Fox 3F-RFP ductile iron bodied combination (double orifice) air valves in sizes from DN 25 to DN 250 manufactured to AS 4956:2008 Air valves for water supply.
The ductile iron bodied range of automatic air valves submitted for appraisal includes flanged valves in sizes DN 50, DN 80, DN 100, DN 150, DN 200 and DN 250 with pressure classifications of PN 16 or PN35. Flanges comply with AS/NZS 4087 Figure B5 (PN16) and Figure B6 (PN35) respectively. DN 25 and DN 50 valves are also available with a 1” and 2” BSP threaded connection, rated as PN 16 or PN35.
The CSA Fox 3F-RFP air valve range incorporates an anti-slam device for surge protection designated a Rapid Filling Prevention (RFP).