1. Basic Identification

• Model: D633-7145

• Brand: MOOG

• Category: Direct Drive Electro-Hydraulic Servo Valve

• Alias: DDV Servo Valve, Integrated Electronic Servo Valve

• Code Definition

  D633: Size 03 direct drive servo valve series

  7145: Flow and electrical configuration code, rated flow 40 L/min

2. Basic Information

• Structure: Permanent magnet linear force motor drive, pilotless design, built-in closed-loop electronic control

• Mounting Standard: ISO 4401-03-03-0-94

• Weight: Approximately 2.5 kg

• Protection Grade: IP67 connector, IP65 valve body

• Ambient Temperature: -20℃ ~ +60℃

• Fluid Temperature: -20℃ ~ +70℃

• Applicable Fluid: Mineral hydraulic oil, ISO 4406 18/15/12 cleanliness grade

3. Function & Positioning

• Core Function: 4/3-way directional, speed, pressure and force closed-loop proportional control

• Product Positioning: High precision and fast response core component for industrial hydraulic systems

• Main Features: Pressure independent dynamic performance, automatic spring centering when power off, low hysteresis, strong anti-pollution capability

4. Core Performance Parameters

• Rated Flow: 40 L/min

• Maximum Working Pressure: 350 bar for P/A/B ports, 50 bar for T port

• Supply Voltage: 24 VDC, working range 18-32 VDC

• Control Signal: ±10 V, ±10 mA, 4-20 mA

• Feedback Signal: 4-20 mA spool position feedback

• Maximum Current Consumption: ≤1.2 A

• Step Response Time: ≤12 ms

• Hysteresis: ≤0.2%

• Linearity: ≤0.1%

• Resolution: ≤0.05%

5. General Matching Accessories

• Grade 10.9 M5 mounting bolts

• Standard sealing assembly

• 5-core shielded cable

• 10μm high pressure hydraulic filter

• M12 waterproof connector

6. Applicable Industries & Equipment