The document specifies the fitness for purpose and certification requirements for float type air valves and purgers having nominal pressures of PN 6, PN 10, PN 16, PN 25 and all diamters as specified in prEN 1074-1 but limited to a maximum of DN 300
EN 1074-4:2000 history
2000EN 1074-4:2000 Valves for water supply - Fitness for purpose requirements and appropriate verification tests - Part 4: Air valves