This document specifies minimum requirements applicable to design, final assessment, designation, marking and documentation for butterfly valves having metallic bodies for use with all type of pipe end connections (e.g. wafer, lug, flange, butt welding, threaded ends) and used for isolating, regulating or controlling applications.

The PN and Class ranges are:

— PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160;

— Class 150; Class 300; Class 600; Class 900.

The size range is:

— DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150; DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750; DN 800; DN 900; DN 1 000; DN 1 050; DN 1 100; DN 1 200; DN 1 400; DN 1 500; DN 1 600; DN 1 800; DN 2 000; DN 2 200; DN 2 400; DN 2 600; DN 2 800; DN 3 000; DN 3 200; DN 3 400; DN 3 600; DN 3 800; DN 4 000.

DN 750 and DN 1 050 apply only for Class 150 and Class 300.

NOTE Sizes are listed in Table D.1.

For applications in accordance with the European legislation for pressure equipment, EN 16668:2025 applies together with this document.

For chemical applications, EN 12569:2020 applies together with this document.

For gas distribution systems, EN 13774:2013 applies together with this document.

For gas transport systems, EN 1594:2024 applies together with this document.

For water supply application, EN 1074-2:2000 applies together with this document.

For process control application, EN 1349:2009 applies together with this document.

The correspondence between DN and NPS is given for information in Annex D.