TS ISO 1219-1

TS ISO 1219-1 is a core standard for the graphic symbols and circuit diagrams used in fluid power systems. It focuses on how symbols for conventional technical drawings and data-processing applications are designed so that they remain consistent, legible, and comparable across documentation. In general technical terms, fluid power covers the transmission and control of energy through hydraulic and pneumatic systems, where diagrams are often the primary way to communicate function.

What the symbol system is intended to do

The scope of this part concerns the basic elements used to build symbols. In the wider engineering context, graphic symbols are the functional language for representing components such as valves, cylinders, pumps, motors, filters, and related devices without relying on pictorial appearance. In circuit diagrams, the symbol expresses how the component behaves and connects in the system, which supports design review, maintenance, training, and technical communication.

Conventional use and data-processing applications

The standard also addresses symbols designed in fixed sizes for direct use in data-processing systems. This is important where diagrams are created, stored, exchanged, or reused digitally and where consistent symbol geometry helps preserve clarity and interoperability. The scope further notes its relationship as a common application of the ISO 14617 series, placing the symbol design approach in the broader context of technical graphic notation.

• Standardises functional representation in fluid power circuit documentation.
• Focuses on symbol rules for conventional technical drawings.
• Includes fixed-size symbols suitable for direct use in data-processing environments.
• Is described as a common application of the ISO 14617 series.