This part of ISO 14617 specifies graphical symbols for valves and dampers in diagrams, including symbols for general-purpose valves, those used in fluid power systems and hygienic valves used in the food and pharmaceutical industries.
DS/ISO 14617-8:2006 history
2006DS/ISO 14617-8:2006 Graphical symbols for diagrams - Part 8: Valves and dampers