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D634-1041

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D634-1041
May 25, 2026

D634-1041

The D634-1041 is a high‑flow, enhanced‑dynamic single‑stage direct drive servo valve in the MOOG D634 series. It has integrated 24 VDC electronics and LVDT closed‑loop spool position feedback. The valve uses a permanent‑magnet linear force motor to drive the spool directly—no pilot oil required, with spring centering for fail‑safe return to neutral on power loss

Description

1. General Description

The D634-1041 is a high‑flow, enhanced‑dynamic single‑stage direct drive servo valve in the MOOG D634 series. It has integrated 24 VDC electronics and LVDT closed‑loop spool position feedback. The valve uses a permanent‑magnet linear force motor to drive the spool directly—no pilot oil required, with spring centering for fail‑safe return to neutral on power lossMoog Inc..

  • Series: D634 (ISO 4401‑05 / NG10)

  • Model 1041: Highest flow + improved dynamics in D634; low internal leakage

  • Typical applications: High‑flow hydraulic presses, large test benches, material fatigue systems, and closed‑loop controls needing max flow + better dynamics + low leakage.

2. Hydraulic Specifications

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

  • T‑port pressure: 50 bar (no Y‑port); 350 bar (with Y‑port)Moog Inc.

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

  • Max flow: approx. 190 L/min (50.2 gpm)

  • Internal leakage: ≤0.55 L/min

  • Fluid: mineral oil per ISO 11158 / DIN 51524

  • Fluid temp: −20 °C to +80 °C

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

3. Performance Characteristics

  • Step response (0→100% stroke): 13–15 ms (faster than 1040)

  • −3 dB bandwidth: 95–105 Hz (higher than 1040)

  • Hysteresis: <0.42% FS

  • Resolution: <0.11% FS

  • Null drift (60 K change): <1.0% FS

  • Repeatability: ≤0.28% FS

4. Electrical Specifications

  • Supply voltage: 24 VDC (18–32 VDC range)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 temp: −20 °C to +60 °C

  • EMC: compliant with CE directives

5. Mechanical & Installation

  • Mounting: ISO 4401 Size 05 (NG10) patternMoog Inc.

  • Weight: approx. 6.3 kg (13.9 lb)

  • Installation: horizontal recommended; clean mounting surface; bleed air from valve and lines 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 1035/1036/1037/1040)

  • Flow: 1041 = 100 L/min (tied with 1040 for highest)

  • Speed: 1041 = 13–15 ms (fastest in high‑flow models; faster than 1040’s 15–17 ms)

  • Bandwidth: 1041 = 95–105 Hz (highest)

  • Leakage: 1041 = ≤0.55 L/min (same as 1040; higher than 1036/1037)


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