D634-1053
May 25, 2026

D634-1053

The D634-1053 is a single-stage, direct-drive servo valve from the MOOG D634 series. It uses a permanent magnet linear force motor to drive the spool directly—no pilot oil required. Built-in 24 VDC electronics and LVDT spool position closed-loop feedback deliver high accuracy and dynamic response that is largely independent of supply pressure. A spring-centered design ensures the spool safely returns to neutral on power loss (fail-safe). Optimized for medium-flow, high-dynamics applications.

Description

1. General Description

The D634-1053 is a single-stage, direct-drive servo valve from the MOOG D634 series. It uses a permanent magnet linear force motor to drive the spool directly—no pilot oil required. Built-in 24 VDC electronics and LVDT spool position closed-loop feedback deliver high accuracy and dynamic response that is largely independent of supply pressure. A spring-centered design ensures the spool safely returns to neutral on power loss (fail-safe). Optimized for medium-flow, high-dynamics applications.Moog Inc.

2. Hydraulic Specifications

  • 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): 100 L/min (26.4 gpm)

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

  • Internal leakage: ≤ 0.55 L/min

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

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

  • Filtration: ISO 4406 17/14/11 or betterMoog GmbH

  • Weight: approx. 6.3 kg (13.9 lb)

3. Dynamic Performance (Typical)

  • Step response (0→100% stroke): ≤20 ms

  • −3 dB bandwidth: 70–80 Hz

  • Hysteresis: <0.4% of full scaleMoog Inc.

  • 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: 3.5 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 reliabilityMoog Inc.

  • Integrated closed-loop control: precise, repeatable positioning

  • Pressure-independent dynamics: stable performance under varying loadsMoog Inc.

  • Low internal leakage: energy efficient

  • Spring-centered fail-safe: safe system shutdown on power loss

6. Applications

  • High-precision hydraulic presses

  • Dynamic material testing machines

  • Fatigue test systems

  • Closed-loop position, velocity, and pressure control systems

7. Pin Assignment (6+PE)

  1. +24 VDC

  2. Power GND

  3. Command +

  4. Command −

  5. Position feedback output

  6. Feedback GND

    PE: Protective earth

    Use shielded twisted pair cable for signals.


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