Our hydraulic schematics for closed-loop control systems use ISO 1219 standard symbols to depict feedback - controlled hydraulic circuits. These schematics illustrate components like servo valves, pressure transducers, and position sensors integrated into the loop for precise control. Key features include: error detection amplifiers, PID controllers, and feedback loops for position, force, or speed. Common applications include aerospace actuators, precision machining tools, and automotive suspension systems. The schematics detail flow paths, pressure ratings, and signal connections, supporting system design, troubleshooting, and maintenance. We provide both 2D CAD drawings and 3D schematic models. Request a closed-loop schematic example or visit [https://www.uranustj.com/] for schematic design guidelines.