ISO 5209:1977

General purpose industrial valves — Marking

Specifies mandatory and optional markings of general purpose valves and states the manner of applying the markings, i.e. on the body, on a flange, or on a identification plate. Markings on the body may be integral with the body or on a plate securely fixed to the body. The table lists those items which may be included in international standards for individual types of valves.