TS ISO 1219-2

TS ISO 1219-2 is the standard for arranging hydraulic and pneumatic circuit diagrams used in fluid power systems. This part brings together the basic rules for drawing circuit diagrams with the graphic symbols defined in ISO 1219-1, and it also includes example diagrams. In practical terms, the focus is not only on what each symbol means, but on how symbols are composed into a clear, consistent circuit representation.

How symbols are organised in circuit diagrams

Fluid power diagrams show a system by function rather than by physical installation order. Valves, actuators, pumps, motors, pressure-control elements and connecting lines are placed so that the operating logic can be read directly from the drawing. From a general technical perspective, this makes it easier for designers, maintenance staff and users to interpret the same system in a common language.

The standard’s central topic is the use of ISO 1219-1 symbols when creating hydraulic and pneumatic diagrams. That means it is concerned less with redefining individual symbols than with how they are organised on the page. The result is a clearer expression of functional relationships, signal paths, energy flow and circuit logic across different types of fluid power equipment.

• Supports a common graphic language for hydraulic and pneumatic circuits.
• Promotes consistent use of ISO 1219-1 symbols in circuit documentation.
• Includes example circuit diagrams to show the rules in practice.
• Helps improve readability and comparability in technical documentation.

Because fluid power systems transmit energy through pressurised fluid, diagram layout and symbol accuracy matter greatly in engineering communication. As a withdrawn standard, TS ISO 1219-2 should be understood as a reference point for the graphical conventions of its subject area rather than as a current active publication. Its title and scope make it useful for understanding the core terminology and drawing logic behind fluid power circuit diagrams.