NF E29-141:2011 Shut-off gas valves, medium pressure - Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings - 5 bar maximum working pressure
2011NF E29-141:2011 Shut-off gas valves, medium pressure - Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings - 5 bar maximum working pressure