D634-381C
D634-381C is a member of MOOG D634 direct drive servo valve series with standard ISO 4401 Size 05 mounting interface. The spool is directly driven by permanent magnet linear force motor with no pilot oil needed. Built-in LVDT achieves closed-loop spool position control to ensure superior accuracy and repeatability. Dynamic performance stays stable regardless of pressure changes. Spring centering structure brings spool back to neutral position automatically for fail-safe protection upon power loss. This model features moderate flow and high dynamic response for high precision industrial control.
Description
1. General Description
D634-381C is a member of MOOG D634 direct drive servo valve series with standard ISO 4401 Size 05 mounting interface. The spool is directly driven by permanent magnet linear force motor with no pilot oil needed. Built-in LVDT achieves closed-loop spool position control to ensure superior accuracy and repeatability. Dynamic performance stays stable regardless of pressure changes. Spring centering structure brings spool back to neutral position automatically for fail-safe protection upon power loss. This model features moderate flow and high dynamic response for high precision industrial control.
2. Model Definition
D634: Direct drive servo valve series381: Medium flow high dynamic configurationC: Revision version C
3. Hydraulic Specifications
Mounting standard: ISO 4401 Size 05 (NG10)Max working pressure of P, A, B ports: 350 barMax pressure of T port: 50 barRated flow at 35 bar pressure drop: 90 L/minMaximum flow rate: approximately 140 L/minInternal leakage: ≤2.1 L/minApplicable fluid: ISO 11158 mineral oilFluid temperature range: -20 °C ~ +80 °CRequired fluid cleanliness: ISO 4406 17/14/11Total weight: approximately 6.9 kg
4. Dynamic Performance
Full stroke step response: ≤17 ms-3dB frequency bandwidth: 62~72 HzHysteresis: less than 0.20% full scalePosition resolution: less than 0.10% full scaleNull drift under 55K temperature change: less than 1.2% full scale
5. Electrical Specifications
Supply voltage: 24 VDC, working range 18~32 VDCMaximum operating current: 2.7 AStandard control signal: ±10 VOptional signal: ±10 mA, 4-20 mASpool position feedback output: 0-10 VDCConnector type: M18, 6 pins with PE terminal, IP65 protection gradeAmbient temperature: -20 °C ~ +60 °CEMC certification: CE compliant
6. Key Features
Pilotless design reduces installation difficulty and maintenance costFast dynamic response meets high-speed control requirementsPressure independent characteristics maintain steady working stateHigh precision control realizes delicate motion adjustmentAutomatic spring reset ensures safe operation under power failureIntegrated electronic drive owns compact structure and good durability
7. Application Scope
High precision hydraulic pressing equipmentAerospace and automobile fatigue testing machinesHigh frequency vibration simulation platformsPrecision closed-loop position, velocity and pressure control systems
8. Pin Assignment
Pin 1: +24 VDC powerPin 2: Power groundPin 3: Command signal positivePin 4: Command signal negativePin 5: Position feedback outputPin 6: Feedback groundPE: Protective earthShielded twisted pair cable is recommended for signal wiring
Get a Quote