TS ISO 5784-2

TS ISO 5784-2 addresses graphic symbols for supply and exhaust in fluid logic circuits used in fluid power systems. It defines the rules for using these symbols in relation to logic symbols so that pipe connections and related functions can be understood more clearly on diagrams. The scope applies to binary fluid power logic devices of any type, whether or not they include moving parts.

What the symbols do in a circuit language

In fluid power logic, symbols are more than drawing shorthand: they turn system behavior into a consistent technical language. Supply symbols indicate where energy or flow is introduced, while exhaust symbols identify where the fluid is discharged from the system. That distinction matters in pneumatic and hydraulic applications because it helps engineers and technicians read how a device is fed, switched, and vented. In general technical practice, this kind of symbolism supports clear communication across design, documentation, and maintenance.

Where this part fits

• Use of supply and exhaust symbols in basic logic systems
• Definition of functions together with diagram circuitry
• A symbolic framework intended to improve understanding of pipe connections
• Applicability to all binary fluid power logic devices, with or without moving parts

This document should be read as part of the broader fluid power symbology family. TS ISO 5784-1 provides the general logic-symbol framework, while TS ISO 5784-2 focuses specifically on supply and exhaust symbols within that framework. Its value lies not in describing equipment performance, but in standardizing how the equipment is represented in technical drawings so the information can be read consistently.