Product Overview
The MOOG D661-4443C / G45JOAA6VSX2HA 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 valve features a torque-motor-driven pilot stage that hydraulically actuates a precision-machined main spool. The result is exceptionally fast dynamic response, high flow capacity, and superior resolution for closed-loop position, velocity, and force control. The D661 platform is widely regarded as the industry benchmark for high-response proportional and servo valve technology, delivering reliable, repeatable performance in the most critical motion control systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage, Spool-Type) |
| Model Designation | D661-4443C / G45JOAA6VSX2HA |
| Manufacturer | MOOG Inc. |
| Operating Pressure | Up to 350 bar (5,080 psi) rated system pressure |
| Pilot Stage | Torque motor with hydraulic pilot amplification |
| Main Stage | Precision-ground 4-way spool with position feedback |
| Rated Flow | High flow capacity (model-dependent, up to 400 L/min at 70 bar valve drop) |
| Step Response | < 10 ms (typical, at 100% step signal) |
| Hysteresis | < 0.5% of rated signal |
| Mounting & Connection | ISO 4401 / CETOP standard subplate mounting interface |
| Electrical Interface | Standard MOOG valve connector with integrated position transducer |
| Fluid Compatibility | Mineral-based hydraulic oils (ISO VG 32–68), fire-resistant fluids available on request |
Engineering Features & Advantages
- Precision Performance: The servo proportional valve (two-stage, spool-type) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original MOOG standards, allowing straightforward retrofit into existing hydraulic systems without rework.
- Rated Capability: Rated for pressure ratings up to 350 bar and flow rates up to 400 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
The D661 platform is widely regarded as the industry benchmark for high-response proportional and servo valve technology, delivering reliable, repeatable performance in the most critical motion control systems.
PRODUCT IMAGES
MOOG D661-4443C / G45JOAA6VSX2HA 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 D661-4443C / G45JOAA6VSX2HA 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.