The standard specifies dimensions and requirements for Storz couplings which are fixed connected to devices with a nominal pressure of 16 bar (PN 16) for delivery and suction operation.
DIN 14334:2020 history
2020DIN 14334:2020 Solid couplings Storz System PN 16 for delivery and suction
1986DIN 14306:1986 Aluminium alloy solid coupling type D for pressure and suction purposes; nominal pressure 16