Delivery valve installations for firefighting purposes – Part 3: Fire hose valves for nominal pressure PN 16
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/2016

Delivery valve installations for firefighting purposes – Part 3: Fire hose valves for nominal pressure PN 16
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2006