Industrial valves. Metallic butterfly valves Ingestion-build-134498 except where it is evident

except where it is evident in the form of radiated sound

surface characteristics

Part 2: Guidance on task requirements

bundles of cylinders

Industrial valves. Metallic butterfly valves Ingestion-build-134498 except where it is evidentThis European Standard specifies requirements for butterfly valves having metallic bodies for use in flanged or butt welding piping systems and used for isolating, regulating or control applications. The PN and Class ranges are as follows: PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; Class 150; Class 300. The DN range is as follows: 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