Product Overview
The MOOG D661-4636 / G60KOAA6VSX2HA is a high-performance servo proportional valve from the MOOG D661 series, engineered for precise electrohydraulic control in demanding industrial and mobile applications. This two-stage servo valve utilizes a robust pilot-operated spool design, where a low-power electrical command signal drives a torque motor or proportional solenoid to modulate the pilot stage, which in turn hydraulically positions the main spool. The result is exceptionally accurate, high-resolution control of flow direction and magnitude, proportional to the input signal. With its integrated spool position feedback and rugged construction, the D661-4636 delivers fast dynamic response, minimal hysteresis, and excellent repeatability, making it a critical component in closed-loop hydraulic systems requiring superior motion control, velocity regulation, and force management.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage, Spool Type) |
| Model Designation | D661-4636 / G60KOAA6VSX2HA |
| Operating Pressure | Up to 350 bar (5075 psi) rated, typical for D661 series |
| Rated Flow | Model code dependent; nominal flow typically 40 to 100 L/min at 70 bar valve pressure drop |
| Mounting & Connection | ISO 4401 standard subplate mounting; electrical interface via 6-pin + PE connector |
| Control Signal | Analog ±10 V DC or ±20 mA (factory configured) |
| Spool Configuration | Four-way, three-position, closed-center (standard); other spool options available |
| Hysteresis | ≤ 0.5% of rated signal |
| Response Time | ≤ 10 ms (typical step response, 0 to 100% signal) |
| Seal Material | NBR (Buna-N) standard; FKM (Viton) available for high-temperature or phosphate ester fluids |
Engineering Features & Advantages
- Precision Performance: The two-stage spool design with integrated position feedback ensures highly accurate flow metering proportional to the command signal, with minimal deadband and excellent resolution for critical motion control loops.
- Fast Dynamic Response: Optimized pilot stage and low-inertia spool assembly deliver rapid response times, enabling high-frequency actuation and precise velocity/position control in closed-loop systems.
- Industrial Reliability: Constructed for continuous duty with durable, corrosion-resistant materials and proven engineering for maximum system uptime.
- 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
With its integrated spool position feedback and rugged construction, the D661-4636 delivers fast dynamic response, minimal hysteresis, and excellent repeatability, making it a critical component in closed-loop hydraulic systems requiring superior motion control, velocity regulation, and force management.
PRODUCT IMAGES
MOOG D661-4636 / G60KOAA6VSX2HA 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.
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- 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 D661-4636 / G60KOAA6VSX2HA Servo Proportional Valve. This US-made hydraulic component features a direct-drive design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.