Industrial valves. Metallic butterfly valves Ingestion-build-109673 Safety requirements given include specific

Safety requirements given include specific requirements for electrical equipment

convenient

specifies nominal aperture sizes and shapes for woven wire cloth and perforated plate in test sieves used for test methods for aggregates

It does not apply to pressure gauges with electrical contacts

Industrial valves. Metallic butterfly valves Ingestion-build-109673 Safety requirements given include specificThis 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