Product Overview
The MOOG D661-6460C / G35HOAA4VSX2HA 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 pilot stage with a spool-type main stage, delivering exceptional dynamic response, high flow capacity, and precise metering characteristics. The valve is designed for closed-loop position, velocity, and force control systems where accuracy and repeatability are critical. Its robust construction and advanced spool geometry ensure minimal hysteresis, excellent resolution, and long-term operational stability in continuous-duty industrial environments.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage, Spool Type) |
| Model Designation | D661-6460C / G35HOAA4VSX2HA |
| Operating Pressure | Up to 350 bar (5,080 psi) rated |
| Rated Flow | Up to 100 L/min (dependent on spool configuration and pressure drop) |
| Pilot Stage | Torque motor with dual nozzle-flapper or jet-pipe design |
| Main Stage | Four-way spool with position feedback |
| Mounting & Connection | Standard ISO 4401 / CETOP interface with subplate mounting |
| Electrical Interface | Standard MOOG valve connector with integrated electronics option |
| Hysteresis | < 0.5% of rated signal |
| Response Time | < 10 ms (typical step response) |
Engineering Features & Advantages
- Precision Performance: Advanced spool and sleeve metering geometry delivers high-resolution flow control with minimal hysteresis and excellent repeatability, ensuring accurate actuator positioning in closed-loop systems.
- High Dynamic Response: Torque-motor pilot stage provides fast, proportional spool actuation for rapid system response in high-cycle industrial applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust construction, contamination-resistant pilot stage, and long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original MOOG D661 series mounting and hydraulic interface standards, ensuring drop-in replacement without system modification.
- 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
Its robust construction and advanced spool geometry ensure minimal hysteresis, excellent resolution, and long-term operational stability in continuous-duty industrial environments.
PRODUCT IMAGES


MOOG D661-6460C / G35HOAA4VSX2HA 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 D661-6460C / G35HOAA4VSX2HA Servo Proportional Valve. This Germany-made hydraulic component features a high-response pilot stage, delivering leak-free, reliable fluid control for heavy-duty industrial systems.