Direct-Operated Servo Valves for Analog Signals D633 and D634 Series

ISO 4401 SIZE 03 AND 05

  • 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

 

Specifications D633 D634
Mounting pattern ISO 4401 size 03 ISO 4401 size 05
Hydraulic Data
Maximum operating pressure – port P, A, B 350 bar (5,000 psi)
Rated flow at ∆pN 35 bar (500 psi) per spool land 5 to 40 I/min (1.3 to 10.6 gpm) 60 to 100 I/min (15.9 to 26.4 gpm)
Maximum flow 75 I/min (19.8 gpm) 180 I/min (47.6 gpm)
Step response time for 0 to 100 % stroke 12 ms  20 ms
Electrical Data
Supply voltage 24 VDC (19 to 32 VDC)
Rated signal options +/-10 V, +/-10 mA and 4-20 mA