MOOG D661-4597 Servo Valve
Core Features
- ServoJet® Pilot Valve Technology: Fast dynamic response, high control precision, and strong anti-contamination capability
- Integrated Electronics: Built-in amplifier, 24 VDC power supply, supports ±10V, ±10mA, and 4-20mA signals
- High Dynamics: 100% step response 6.5–14 ms, frequency response up to 200 Hz
- High Precision: No dead zone, excellent resolution and repeatability
- Fail-Safe Design: Valve spool returns to neutral position in case of power failure, ensuring system safety
- Installation Standard: ISO 4401 Specification 05 (NG10) for easy integration
Technical Parameters
Hydraulic Specifications
| Parameter |
Specification |
| Rated Flow Rate |
20–200 l/min (Δp = 35 bar/per throttle edge) |
| Maximum Operating Pressure |
P/A/B port: 350 bar (5000 psi); T port: 210 bar (3000 psi) |
| Working Medium |
Petroleum-based hydraulic oil (DIN 51524), viscosity 5–400 mm²/s |
| Temperature Range |
Ambient: -20℃ to +60℃; Oil: -20℃ to +80℃ |
| Weight |
Approx. 5.7 kg (12.6 lb) |
Electrical Specifications
| Parameter |
Specification |
| Power Supply |
24 VDC (18–32 VDC) |
| Control Signals |
±10 V, ±10 mA, 4–20 mA (optional) |
| Protection Rating |
Connector IP65 |
Typical Applications
- Electro-hydraulic position, speed, and pressure closed-loop control systems
- Injection molding machines and die casting machines
- Testing machines and rolling mills
- Servo presses and industrial hydraulic systems
- Applications requiring high response and high precision control
Installation and Maintenance
Installation: ISO 4401-05 flange, M6 bolts, torque 13 Nm
Filtration: Pilot stage requires high-pressure filter (no bypass, with alarm), oil cleanliness ISO 4406 16/13 and above
Sealing: Standard NBR, FKM (HNBR) optional