The publication of DIN EN 161 has made it necessary to restrict the scope of the standard to automatic valves for a maximum working pressure of up to 4 bar.
DIN 3394-3:2004 history
2013DIN EN 16304:2013 Automatic vent valves for gas burners and gas burning appliances; German version EN 16304:2013
2004DIN 3394-3:2004 Automatic control valves - Part 3: Class 0 pressure relief, valves for pressure up to 4 bar
1970DIN 3394-3 E:2000-06 Automatic control valves - Part 3: Class 0 pressure relief, valves for pressure up to 4 bar