Servovalves and Servo-Proportional Valves

Direct-Operated Pressure and Directional (p/Q) Control
Servovalves 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

Specifications

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