It uses a permanent-magnet linear force motor to directly shift the valve spool — eliminating the need for pilot oil and enabling fast, high-performance response. Moog+2Scribd+2
With built-in electronics and an integrated pressure transducer (and optionally fieldbus interfaces such as CANopen, EtherCAT, or PROFIBUS-DP), the D638 offers high flexibility and control precision for demanding industrial applications.
