MOOG D661-4539 Servo Valve
Technical Specifications
| Parameter |
Value |
| Rated Flow Rate |
90 L/min (35 bar differential pressure/throttling edge) |
| Maximum Operating Pressure |
P/A/B port: 350 bar (5000 psi); T port: 210 bar (3000 psi) |
| Power Supply |
24 VDC (18~32 VDC) |
| Control Signal |
±10 V / ±10 mA / 4~20 mA (factory optional) |
| Step Response |
≤10 ms (0~100% stroke, 210 bar operating condition) |
| Valve Core Type |
Spring-centered, fail-safe (returns to neutral position after power failure) |
| Operating Temperature |
-20°C ~ +70°C (Optimal for medium 10~50°C) |
| Protection Rating |
Electronic components IP65, valve body IP67 |
| Contamination Resistance |
Recommended NAS 8, minimum NAS 10 |
| Weight |
Approx. 5.7 kg |
| Sealing |
Standard FPM (Viton), compatible with mineral oil/synthetic oil |
Core Product Advantages
- ServoJet® Jet Tube Pilot: Strong anti-fouling capability, long lifespan, low leakage, dynamic response unaffected by oil supply pressure fluctuations
- Built-in Closed-Loop Electronics: Valve core displacement sensor + PWM drive, hysteresis < 0.2%, repeatability < 0.1%, extremely high control accuracy
- High Dynamics + High Flow Rate: 90 L/min high flow rate + millisecond-level response, balancing speed and accuracy
- Fault-Safe and Reliable: Automatic return to neutral position in case of power failure/loss, protecting equipment and system safety
- Industrial-Grade Durability: Stainless steel valve core, cast iron valve body, suitable for high temperature, high pressure, and vibration harsh conditions
Physical and Installation Specifications
- Mounting Surface: ISO 4401-05 standard, 4 M8 mounting holes
- Dimensions: Approx. 230 × 130 × 160 mm (Length × Width × Height)
- Connection: P/A/B/T standard oil-filled connector, X/Y pilot connector optional
- Wiring: Industrial waterproof plug (IP65), to be ordered separately