NF E29-135:2011 Shut-off gas valves, low pressure - Manually operated ball valves and closed bottom taper plug valves for gas installations for building - Maximum working pressure below or equal to 0,5 bar
2011NF E29-135:2011 Shut-off gas valves, low pressure - Manually operated ball valves and closed bottom taper plug valves for gas installations for building - Maximum working pressure below or equal to 0,5 bar