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D634-1063

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D634-1063
May 25, 2026

D634-1063

The D634‑1063 is a single‑stage, direct‑drive servo valve in the MOOG D634 series. It uses a permanent magnet linear force motor to drive the spool directly—no pilot oil required. Integrated 24 VDC electronics with LVDT closed‑loop spool position feedback provide high accuracy and dynamic response largely independent of supply pressure. Spring‑centered design ensures the spool returns to neutral on power loss (fail‑safe). The 1063 is calibrated for ultra‑high flow with medium dynamic performance.

Description

1. General Description

The D634‑1063 is a single‑stage, direct‑drive servo valve in the MOOG D634 series. It uses a permanent magnet linear force motor to drive the spool directly—no pilot oil required. Integrated 24 VDC electronics with LVDT closed‑loop spool position feedback provide high accuracy and dynamic response largely independent of supply pressure. Spring‑centered design ensures the spool returns to neutral on power loss (fail‑safe). The 1063 is calibrated for ultra‑high flow with medium dynamic performance.

2. Hydraulic Specifications

  • Mounting: ISO 4401 Size 05 (NG10)

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

  • T‑port pressure: 50 bar (without Y‑port); 350 bar (with Y‑port)Moog Inc.

  • Rated flow (Δp = 35 bar per land): 120 L/min (31.7 gpm)

  • Maximum flow: approx. 250 L/min (66.0 gpm)

  • Internal leakage: ≤ 1.0 L/min

  • Fluid: Mineral oil (ISO 11158 / DIN 51524)

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

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

  • Weight: approx. 6.8 kg (15.0 lb)

3. Dynamic Performance (Typical)

  • Step response (0 → 100% stroke): ≤ 25 msMoog Inc.

  • −3 dB bandwidth: 45–55 Hz

  • Hysteresis: < 0.5% of full scale

  • Resolution: < 0.1% of full scaleMoog Inc.

  • Null drift (60 K temp change): < 1.2% of full scale

4. Electrical Specifications

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

  • Max operating current: 3.5 A

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

  • Spool position feedback output: 0–10 VDC

  • Connector: M18, 6 pins + PE, IP65Moog Inc.

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

  • EMC: CE compliant

5. Key Features

  • Pilot‑free direct drive: simple installation, high reliability

  • Integrated closed‑loop control: precise, repeatable positioning

  • Pressure‑independent dynamics: stable under varying loads

  • Low internal leakage: energy efficient

  • Spring‑centered fail‑safe: safe shutdown on power loss

6. Applications

  • High‑precision hydraulic presses

  • Dynamic material testing machines

  • Fatigue test systems

  • Closed‑loop position, velocity, and pressure control

  • Industrial automation and motion control

7. Wiring Definition

  • Pin 1: +24 VDC

  • Pin 2: Power ground

  • Pin 3: Command signal (+)

  • Pin 4: Command signal (−)

  • Pin 5: Spool position feedback (0–10 VDC)

  • Pin 6: Feedback ground

  • PE: Protective earth

  • Recommendation: Use shielded twisted‑pair cable for signals.


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