Product Overview
The MOOG G631-3005B / H75JOFM4VBR is a high-performance, two-stage electrohydraulic servo valve engineered by MOOG, the global benchmark in precision motion control. Operating on a torque-motor pilot stage with a spool-type second stage, this valve converts low-power electrical command signals into highly accurate hydraulic flow and pressure outputs. It is designed for closed-loop position, velocity, and force control in demanding industrial and aerospace-grade motion systems where dynamic response, resolution, and null stability are critical. The G631 series is widely regarded as a direct-fit, high-reliability solution for continuous-duty servo applications requiring minimal hysteresis and excellent repeatability.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Electrohydraulic Servo Valve (Two-Stage, Spool Type) |
| Model Designation | G631-3005B / H75JOFM4VBR |
| Manufacturer | MOOG |
| Pilot Stage | Torque motor with flapper/nozzle or jet pilot configuration |
| Second Stage | Precision spool and sleeve assembly with metering lands |
| Operating Pressure | Standard Industrial Grade (Up to rated bar per MOOG G631 series) |
| Rated Flow | Model-dependent flow rating at specified pressure drop (per G631-3005B designation) |
| Mounting & Connection | Standard MOOG subplate / manifold interface with ISO-compliant port pattern |
| Electrical Interface | Standard servo valve coil connection with polarity-identified terminals |
| Hysteresis & Resolution | Ultra-low hysteresis, high-resolution spool positioning |
| Null Adjustment | Mechanical null bias adjustment for precise zero-flow calibration |
Engineering Features & Advantages
- Precision Performance: The torque-motor pilot stage delivers exceptionally fast dynamic response and high spool positioning accuracy, enabling precise flow metering and closed-loop control in high-cycle servo applications.
- 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
The G631 series is widely regarded as a direct-fit, high-reliability solution for continuous-duty servo applications requiring minimal hysteresis and excellent repeatability.
PRODUCT IMAGES
MOOG G631-3005B / H75JOFM4VBR Servo Valve
âš¡ 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 G631-3005B / H75JOFM4VBR Servo Valve. This Germany-made high-performance hydraulic component features a two-stage design with mechanical feedback, delivering leak-free, reliable fluid control for heavy-duty industrial systems.