Direct-Operated Pressure and Flow (p/Q) Control Servo Valves with Fieldbus Interface D638 and D639 Series

  • Directly driven by linear force motor: No pilot flow required
  • Linear force motor with high force range (improves operating limits): No flow limitations
  • Directly driven design: Pressure-independent dynamic performance
  • Low current consumption at and near hydraulic null
  • Spool is in spring-centered position at loss of power supply: Actuator stops
  • Integrated digital electronics with integrated pressure transducer allows a high grade of flexibility

Hydraulic Data
Rated Flow 5 to 100 l/min (1.3 to 26.3 gpm) @ ∆p 35 bar (500 psi) per land
Maximum Flow 180 l/min (47 gpm) size 05
Maximum Operating Pressure 350 bar (5,000 psi)
Mounting Pattern ISO 4401 Size 03 and 05 (NG 6 and 10)
100% Step Response 8 ms @ 210 bar (3,000 psi)
Supply Voltage 24 VDC (18 to 32 VDC)
Fieldbus Interface CANopen, Profibus and EtherCAT
Options Analog Signals