TS ISO 14617-8

TS ISO 14617-8 is a part of the ISO 14617 series that deals with graphical symbols used to represent valves and dampers in diagrams. It provides symbols for general-purpose valves, as well as valves used in fluid power systems and hygienic valves used in the food and pharmaceutical industries, helping technical drawings present these components consistently.

Valve and damper distinctions within a symbol system

In general engineering usage, valves control, start, stop, or direct the flow of a fluid, while dampers are commonly associated with throttling or regulating flow in ducts and similar flow paths. In diagram work, that distinction matters because visually similar marks can stand for different equipment, and misreading them can lead to an incorrect understanding of the system. As general technical context, standardised symbols support consistent reading of process diagrams, machine drawings, and plant documentation across teams and disciplines.

What this part covers

• Graphical symbols for general-purpose valves
• Symbols for valves used in fluid power systems
• Symbols for hygienic valves used in the food and pharmaceutical industries
• A reference to ISO 81714-1 for general rules on creating and applying graphical symbols in diagrams
• A reference to ISO 14617-1 for the overall ISO 14617 framework, registration numbers, and symbol usage guidance

This listing corresponds to a withdrawn edition of ISO 14617-8, so its value lies in the symbol vocabulary defined by that part. Rather than describing a complete device design, the standard focuses on expressing the relevant components in a shared graphical language for diagrams.