D634-3001
May 25, 2026

D634-3001

The D634‑3001 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 3001 is calibrated for medium flow, high dynamics, general‑purpose closed‑loop control.

Description

1. General Description

The D634‑3001 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穆格中国. 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)穆格中国. The 3001 is calibrated for medium flow, high dynamics, general‑purpose closed‑loop control.

2. Hydraulic Specifications

  • Mounting: ISO 4401 Size 05 (NG10)穆格中国

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

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

  • Rated flow (Δp = 35 bar per land): 60 L/min (15.8 gpm)Moog Inc.

  • Maximum flow: approx. 185 L/min (48.8 gpm)Moog Inc.

  • Internal leakage: ≤ 0.6 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. 6.3 kg (13.9 lb)

3. Dynamic Performance (Typical)

  • Step response (0 → 100% stroke): ≤ 20 msMoog Inc.

  • −3 dB bandwidth: 60–70 Hz

  • Hysteresis: < 0.4% of full scale

  • Resolution: < 0.1% of full scale

  • Null drift (60 K temp change): < 1.0% of full scale

4. Electrical Specifications

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

  • Max operating current: 3.0 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穆格中国

  • Integrated closed‑loop control: precise, repeatable positioning

  • Pressure‑independent dynamics: stable under varying loads穆格中国

  • Low internal leakage: energy efficient

  • Spring‑centered fail‑safe: safe shutdown on power loss穆格中国

6. Applications

  • High‑speed hydraulic axes

  • General‑purpose position/velocity/pressure control

  • Injection molding machines

  • Machine tool actuators

  • Industrial automation

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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