Delivery valve installations; connected with dry rising fire mains, filling armature PN 25
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/1980

Delivery valve installations for firefighting purposes – Part 4: Filling valves PN 16 connected with firefigthing pipes
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2008