1. General Description

2. Technical Specifications

2.1 Hydraulic Parameters

• Rated Flow: 180 L/min (at 210 bar/3000 psi, refer to flow curve)

• Max Operating Pressure:

  • Ports P, A, B: 350 bar (5000 psi)Moog Inc.

  • Port T (without Y): 50 bar (725 psi); (with Y): 350 bar (5000 psi)Moog Inc.

• Fluid Compatibility: Mineral oil-based hydraulic fluids (DIN 51524 parts 1–3)

• Fluid Viscosity: 15–100 mm²/s (recommended); 5–400 mm²/s (allowable)

• Cleanliness Class: NAS 1638 Class 6 / ISO 4406 15/12 or better

• Leakage: <2.0 L/min (neutral position)

• Step Response Time (0–100%): 12 msMoog Inc.

2.2 Electrical Parameters

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

• Max Current Consumption: 1.5 A

• Input Command Signals:

  • Voltage: 0 to ±10 VDC (input resistance 50 kΩ)Moog Inc.

  • Current: 0 to ±10 mA (load resistance 200 Ω); 4 to 20 mA (load resistance 200 Ω)Moog Inc.

• Feedback Signal: 4–20 mA (spool position, load resistance 300–500 Ω)Moog Inc.

• Protection Class: IP65 (with mating connector)Moog Inc.

• EMC Compliance: Meets EC Directive requirements

2.3 Mechanical & Environmental

• Mounting Pattern: ISO 4401-03-03-0-05

• Weight: 2.7 kg (5.95 lb)

• Temperature Range:

  • Ambient: -20 °C to +60 °C (-4 °F to +140 °F)

  • Fluid: -20 °C to +80 °C (-4 °F to +176 °F)

• Vibration Resistance: 30 g, 3-axis, 10 Hz–2 kHzMoog Inc.

• Shock Resistance: 50 g, 6 directions, 3 msMoog Inc.

• Seal Material: NBR (standard), FPM (optional)

3. Operation Principle

4. Installation Instructions

4.1 Mechanical Installation

1. Mounting Surface: Ensure flatness ≤0.02 mm/100 mm and roughness Ra <1 μm.

2. Mounting Bolts: Use M5×60 DIN 912 (10.9/12.9 grade), torque to 8.5–10 N·m.

3. Port Connection: Align P (inlet), T (return), A/B (actuator ports), and Y (drain) ports; replace O-rings if damaged.

4. Installation Position: Any orientation (fixed or moving); ensure drain port Y is routed correctly if used.

4.2 Electrical Wiring

1. Connector: 6+PE-pin DIN 43563 (metal housing, IP65)Moog Inc..

2. Pin Assignment:

   • Pin A: 24 VDC Power

   • Pin B: 0 V (Ground)

   • Pin C: Not Used

   • Pin D: Command Signal (Voltage/Current)

   • Pin E: Inverted Command (Voltage/Current)

   • Pin F: Spool Position Feedback (4–20 mA)

   • PE: Protective Ground

3. Cabling: Use twisted, shielded cables; connect shield to 0 V (power supply side) and connector housing for EMC protection.

5. Commissioning & Adjustment

5.1 System Flushing

• Flush the hydraulic system before initial operation and after modifications to achieve ISO 4406 15/12 cleanliness.

• Replace the valve with a flushing plate; flush at operating temperature.

• Minimum flushing time: t=5V/Q (V=reservoir volume, Q=pump flow).

• After flushing, install high-pressure filters (β10 ≥75, 10 μm absolute) and mount the valve.

5.2 Electrical Null Adjustment

1. Remove the pan head screw on the electronics housing to access the 4-turn null potentiometer.

2. With 0 command signal applied, adjust the potentiometer until flow null is achieved (no flow between A/B and T).

3. Reinstall the screw after adjustment to maintain IP65 protection.

6. Maintenance

• The valve is maintenance-free under normal operating conditions (clean fluid, correct pressure/temperature).

• Replace system filters regularly to maintain fluid cleanliness (ISO 4406 15/12 or better).

• Inspect seals, connectors, and wiring periodically for leaks, damage, or corrosion.

• Do not disassemble the valve; unauthorized repair voids the warranty. Contact MOOG-authorized service facilities for repair.

7. Troubleshooting

8. Safety Precautions

• Installation, adjustment, and maintenance must be performed by trained personnel familiar with hydraulic and electrical systems.

• Depressurize the hydraulic system and disconnect electrical power before disassembly or maintenance.

• Do not exceed maximum pressure ratings (350 bar for P/A/B) to prevent valve damage or personal injuryMoog Inc..

• Use only MOOG-approved spare parts and accessories.

• Ensure proper grounding to prevent electrical shock and EMC issues.