Product Overview
The MOOG G631-3005B / H60JOFM4VBR is a high-performance, two-stage electrohydraulic servo valve manufactured by MOOG, the global benchmark in precision motion control. This valve operates on a torque-motor, flapper-nozzle pilot stage that hydraulically positions a hardened spool within the second-stage sleeve, delivering infinitely variable, bidirectional flow control proportional to the electrical input current. Engineered for closed-loop position, velocity, and force control, the G631 series is a direct-acting, high-response servo valve widely deployed in applications demanding exceptional dynamic bandwidth, minimal hysteresis, and long-term null stability. The H60JOFM4VBR designation defines the specific spool configuration, rated flow, and electrical interface of this factory-configured unit, making it a precise, drop-in solution for critical industrial and aerospace-grade motion control systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Electrohydraulic Servo Valve (Two-Stage, Flapper-Nozzle Pilot) |
| Model Designation | G631-3005B / H60JOFM4VBR |
| Manufacturer | MOOG Inc. |
| Operating Pressure | Standard Industrial Grade (Up to 210 bar rated / 315 bar peak) |
| Rated Flow | Nominal 5–40 L/min at 70 bar valve pressure drop (per spool code) |
| Pilot Stage | Torque motor with dual nozzle-flapper assembly |
| Second Stage | Four-way, closed-center, critical spool-sleeve metering |
| Rated Input Current | ±40 mA (differential, standard MOOG coil configuration) |
| Hysteresis | < 3% of rated current |
| Threshold | < 1% of rated current |
| Null Shift | < 2% at constant supply pressure and temperature |
| Mounting & Connection | Standard ISO 4401 / MOOG subplate interface |
Engineering Features & Advantages
- Precision Performance: The electrohydraulic servo valve (two-stage, flapper-nozzle pilot) 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 OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
- Rated Capability: Rated for pressure ratings up to 210 bar and flow rates up to 40 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
Engineered for closed-loop position, velocity, and force control, the G631 series is a direct-acting, high-response servo valve widely deployed in applications demanding exceptional dynamic bandwidth, minimal hysteresis, and long-term null stability.
PRODUCT IMAGES
MOOG G631-3005B / H60JOFM4VBR 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 / H60JOFM4VBR 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.