This part of IEC 60534 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 recommended that the marking of all valves conform to this standard whenever possible unless otherwise agreed between the manufacturer and purchaser.#,,#
DIN EN 60534-5:2004 history
2004DIN EN 60534-5:2004-09 Industrial-process control valves - Part 5: Marking (IEC 60534-5:2004); German version EN 60534-5:2004 / Note: DIN IEC 60534-5 (1984-09) remains valid alongside this standard until 2007-03-01.
2004DIN EN 60534-5:2004 Industrial-process control valves - Part 5: Marking (IEC 60534-5:2004); German version EN 60534-5:2004