Specifies mandatory and supplementary markings of control valves. Some mandatory markings may be inappropriate for some valves of special design, and some supplementary markings may be appropriate only to specific types of control valves. It is recommend
IEC 60534-5:2004 history
2004IEC 60534-5:2004 Industrial-process control valves - Part 5: Marking
1982IEC 60534-5:1982 Industrial-process control valves. Part 5 : Marking