Review of ISO 1219 for Practical Use of Graphical Symbols and Circuit Diagrams

This study reviews the ISO documentation of codes for fluid power systems. The use of correct symbols for different components and circuit diagrams is important. Fluid power systems have a lot of applications due to their high power to weight ratio. To communicate the specifications and arrangement of pumps, motors, valves, actuators and other accessories in a hydraulic or pneumatic system, developing of rules and standards is important so as to have a common vocabulary to understand the system. This paper focuses on the correct use of the latest edition of ISO 1219. This study explains why there was a need for introducing new edition of ISO 1219. The main differences between the latest version and the old version are highlighted and analyzed for correct usage in practical situations.