Hydraulic valves are a part of the hydraulic system that operates a robotic arm. The hydraulic system uses fluid to transfer force from one part of the system to another part of the same system. The system's dynamics can be changed by manipulating fluid volumes in different parts of the system. Valves play an essential role in this dynamic. For example, the hydraulic system operates in the robotic arm might include valves such as check valves, relief valves, and pilot valves.