Product Overview
The MOOG D661-4580D / G35HOCA4NSM5HO is a high-performance servo proportional valve from the MOOG D661 series, engineered for precise electrohydraulic control in demanding industrial and mobile applications. Utilizing MOOG’s proven two-stage servo valve design, this unit features a torque-motor-driven pilot stage that hydraulically actuates a precision spool within the main stage. The result is exceptionally fast dynamic response, high resolution flow metering, and superior repeatability. The D661 platform is widely regarded as the industry benchmark for closed-loop position, velocity, and force control, making it a critical component in systems requiring exacting motion control accuracy and long-term reliability.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage, Spool Type) |
| Model Designation | MOOG D661-4580D / G35HOCA4NSM5HO |
| Operating Pressure | Up to 350 bar (5,080 psi) rated system pressure |
| Rated Flow | Nominal 35 L/min at 70 bar valve pressure drop (per size code G35) |
| Pilot Stage | Torque motor with hydraulic pilot amplification |
| Spool Configuration | Four-way, closed-center, zero-lap critical spool |
| Electrical Interface | Integrated servo amplifier / analog command input |
| Mounting & Connection | Standard ISO 4401 / CETOP subplate mounting interface |
| Seal Material | NBR / FKM (standard mineral oil compatible) |
| Fluid Temperature Range | -20°C to +80°C (standard industrial hydraulic fluid) |
Engineering Features & Advantages
- Precision Performance: The torque-motor pilot stage delivers extremely high resolution spool positioning, enabling precise flow metering and accurate closed-loop control of position, velocity, and force in servo-hydraulic systems.
- Fast Dynamic Response: Optimized pilot-stage hydraulics provide high-frequency response characteristics essential for demanding motion control profiles and high-cycle industrial machinery.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust construction, contamination-tolerant pilot filtration, and long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original MOOG OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
Typical Industrial Applications
The D661 platform is widely regarded as the industry benchmark for closed-loop position, velocity, and force control, making it a critical component in systems requiring exacting motion control accuracy and long-term reliability.
PRODUCT IMAGES
MOOG D661-4580D / G35HOCA4NSM5HO Servo Proportional Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine MOOG D661-4580D / G35HOCA4NSM5HO Servo Proportional Valve. This Germany-made hydraulic component features a high-response spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.