Contact Info

D634-1024

Home / Product/ MOOG
D634-1024
May 25, 2026

D634-1024

The D634-1024 is a single‑stage, direct‑drive servo valve (DDV) with integrated 24 VDC electronics and LVDT spool closed‑loop feedback. It uses a permanent magnet linear force motor to drive the spool without pilot oil, ensuring high reliability and fast response. Series: D634 (ISO 4401 Size 05 / NG10) Model: 1024 = High‑flow, high‑dynamic response version Design: 4‑way, spring‑centered, zero‑lap spool Applications: High‑speed injection molding, hydraulic presses, machine tools, and high‑precision closed‑loop motion control systems.

Description

1. GENERAL DESCRIPTION

The D634-1024 is a single‑stage, direct‑drive servo valve (DDV) with integrated 24 VDC electronics and LVDT spool closed‑loop feedback. It uses a permanent magnet linear force motor to drive the spool without pilot oil, ensuring high reliability and fast response.

  • Series: D634 (ISO 4401 Size 05 / NG10)

  • Model: 1024 = High‑flow, high‑dynamic response version

  • Design: 4‑way, spring‑centered, zero‑lap spool

  • Applications: High‑speed injection molding, hydraulic presses, machine tools, and high‑precision closed‑loop motion control systems.

2. HYDRAULIC SPECIFICATIONS

表格
ParameterValue
Max pressure (P, A, B)350 bar (5,000 psi)Moog Inc.
Port T (without Y)50 bar (725 psi)Moog Inc.
Port T (with Y)350 bar (5,000 psi)Moog Inc.
Rated flow (Δp = 35 bar/land)70–90 L/min (18.5–23.8 gpm)
Max flow≈180 L/min (47.5 gpm)
Internal leakage≤0.40 L/min
Fluid typeMineral oil ISO 11158 / DIN 51524
Fluid temperature−20 °C … +80 °C
Recommended cleanlinessISO 4406 17/14/11

3. PERFORMANCE (TYPICAL)

表格
ParameterValue
Step response (0 → 100%)≈14 ms
Frequency response (−3 dB)≥90 Hz
Hysteresis<0.35% FS
Resolution<0.10% FS
Null drift (ΔT = 60 K)<0.9% FS
Repeatability<0.15% FS

4. ELECTRICAL SPECIFICATIONS

表格
ParameterValue
Supply voltage24 VDC (18–32 VDC)Moog Inc.
Max current2.7 A
Control signal (jumper select)±10 V, ±10 mA, 4–20 mAMoog Inc.
Spool feedback output0–10 VDC
ConnectorM18, 6+PE, IP65Moog Inc.
Ambient temperature−20 °C … +60 °C
EMC complianceCE (EN 61000‑6‑2, EN 61000‑6‑4)

5. FUNCTIONAL PRINCIPLE

  • Closed‑loop spool control: An LVDT continuously measures spool position; the integrated electronics compare it to the command signal and drive the linear motor to eliminate position error.

  • Force motor: Permanent magnet linear motor provides bidirectional force for fast, precise spool positioning.

  • Fail‑safe: Spring‑centered design returns spool to neutral on power loss.

6. INSTALLATION & MOUNTING

  • Mounting pattern: ISO 4401‑05‑05‑0‑94

  • Mounting surface: Flat, clean, roughness Ra ≤ 3.2 μm

  • Torque: M6 bolts → 9–11 Nm

  • Orientation: Any (horizontal preferred for best drainage)

  • Venting: Remove air from valve and lines before operationMoog GmbH.

7. WIRING DIAGRAM (M18 6+PE)

表格
PinFunction
1+24 VDC
20 VDC (GND)
3Command signal (+)
4Command signal (−)
5Feedback output (0–10 V)
6Feedback GND
PEProtective earth

8. MAINTENANCE

  • No internal maintenance – sealed for life.

  • Check fluid cleanliness regularly (ISO 17/14/11).

  • Inspect electrical connector for damage or corrosion.

  • Do not disassemble – warranty void if opened.

9. ORDERING CODE (EXCERPT)

D634 - 1024 - XXXX

  • 1024 = High‑flow, high‑dynamic response

  • Next digits = signal type, feedback, sealing, etc.

10. RELATED DOCUMENTS

  • Moog D633/D634 Series User Manual (English)

  • D634‑1024 Datasheet

  • Installation Drawing DWG‑D634‑05


Get a Quote

Search

Categories

pages