The Moog D684 series valve is a high-performance, 2-stage proportional directional control valve with integrated digital electronics. It is engineered for demanding electrohydraulic control applications that require high dynamics, precision, and reliability. This particular model features a specific flow rate, a fieldbus interface for seamless integration into modern control systems, and a defined fail-safe position to ensure system safety. The on-board electronics manage the control loop, diagnostics, and communication, making it a sophisticated component for advanced machinery in industries such as plastics processing, metal forming, and test applications.