DS DS/EN 60534-2-4
DS DSEN 60534-2-4 2009-JUL-07 ndustral-process control valves - Part 2-4 Flow capacty - nherent flow characterstcs and rangeablty
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This part of IEC 60534 applies to all types of industrial-process control valves. It defines how to state typical control valve inherent flow characteristics and inherent rangeabilities. It also defines how to establish criteria for adherence to manufacturer-stated flow characteristics.