What symbol is used in a pneumatic schematic to indicate that two crossing lines are connected?

In pneumatic schematics, the presence of a dot at the intersection of two crossing lines signifies that those lines are connected. This is an important element in interpreting fluid power diagrams, as it clearly indicates points where pneumatic lines join together, facilitating the understanding of the flow and control of air within a system. The use of a dot helps prevent confusion that might arise from simply having lines cross each other without interaction; this differentiation is crucial for proper troubleshooting and design of pneumatic circuits. Understanding these symbols ensures that anyone reading the schematic can accurately follow the path of the air flow and analyze the functionality of the system effectively.