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D634-1043

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D634-1043
May 25, 2026

D634-1043

The D634-1043 is the top-tier high-flow, ultra-high-dynamics model in the MOOG D634 series. It is a single-stage direct drive servo valve with integrated 24 VDC electronics and LVDT-based closed-loop spool position feedback. Key features:

Description

1. General Description

The D634-1043 is the top-tier high-flow, ultra-high-dynamics model in the MOOG D634 series. It is a single-stage direct drive servo valve with integrated 24 VDC electronics and LVDT-based closed-loop spool position feedbackMoog Inc..
Key features:

  • No pilot oil required: Permanent magnet linear force motor drives spool directlyMoog Inc..

  • Spring-centered: Failsafe return to neutral on power lossMoog Inc..

  • Highest performance in D634 line: max flow + fastest response + highest bandwidth.

  • Applications: High-speed hydraulic presses, dynamic material test benches, fatigue testing machines, and closed-loop systems requiring ultra-fast response + high flow + minimal leakage.

2. Hydraulic Specifications

  • Max working pressure (P, A, B): 350 bar (5,000 psi)

  • T-port pressure: 50 bar (no Y-port); 350 bar (with Y-port)

  • Rated flow (Δp = 35 bar per land): 100 L/min (26.4 gpm)

  • Max flow: ~190 L/min (50.2 gpm)

  • Internal leakage: ≤0.55 L/min

  • Fluid: Mineral oil per ISO 11158 / DIN 51524

  • Fluid temperature: −20 °C to +80 °C

  • Filtration: ISO 4406 17/14/11 or better

3. Performance Characteristics (Key Upgrade vs. 1042)

  • Step response (0→100% stroke): 9–11 ms (fastest in D634)

  • −3 dB bandwidth: 115–125 Hz (highest in D634)

  • Hysteresis: <0.38% FS

  • Resolution: <0.09% FS

  • Null drift (60 K change): <0.8% FS

  • Repeatability: ≤0.22% FS

4. Electrical Specifications

  • Supply voltage: 24 VDC (range: 18–32 VDC)Moog Inc.

  • Max operating current: 3.5 A

  • Command signals (jumper-selectable): ±10 V, ±10 mA, 4–20 mAMoog Inc.

  • Spool position feedback: 0–10 VDC (standard)

  • Connector: M18, 6-pin + PE, IP65Moog Inc.

  • Ambient temperature: −20 °C to +60 °C

  • EMC: CE compliant

5. Mechanical & Installation

  • Mounting: ISO 4401 Size 05 (NG10) pattern

  • Weight: ~6.3 kg (13.9 lb)

  • Installation: Horizontal mounting recommended; clean surface required; bleed air before commissioning

6. Pinout (M18 Connector)

  1. +24 VDC

  2. Power GND

  3. Command +

  4. Command −

  5. Spool position feedback (0–10 V)

  6. Feedback GND

    PE: Protective Earth (chassis ground)

7. Key Differences (vs. 1040/1041/1042)

  • Flow: 1043 = 100 L/min (same as 1040/1041/1042)

  • Speed: 1043 = 9–11 ms (fastest; 1042 = 11–13 ms)

  • Bandwidth: 1043 = 115–125 Hz (highest; 1042 = 105–115 Hz)

  • Leakage: 1043 = ≤0.55 L/min (same as 1040–1042)


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