Product Overview
The MOOG D638-349-0002 / R04K01M0HSM2MB0K1B1 is a high-performance servo proportional valve engineered by Moog, the global benchmark in electrohydraulic motion control. This valve operates on a two-stage, closed-loop servo principle: a precision torque motor drives a flapper/nozzle or jet pilot stage, which hydraulically positions a hardened spool within the main stage to deliver infinitely variable, bidirectional flow control proportional to the electrical command signal. The R04K01M0HSM2MB0K1B1 configuration code designates a size 04 (NG6 / CETOP 3) high-response spool valve with integrated analog or fieldbus-compatible amplifier electronics, making it a direct drop-in motion control element for demanding closed-loop position, velocity, force, and pressure regulation tasks in industrial and mobile hydraulic systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Proportional Valve (Two-Stage Electrohydraulic Directional Control Valve) |
| Model Designation | MOOG D638-349-0002 / R04K01M0HSM2MB0K1B1 |
| Valve Size / Interface | NG6 (CETOP 3 / ISO 4401-03) subplate mounting pattern |
| Pilot Stage Principle | Torque-motor driven flapper/nozzle or jet pilot with mechanical feedback |
| Operating Pressure | Standard Industrial Grade (up to 315 bar system pressure, pilot dependent) |
| Rated Flow | Size 04 spool, nominal flow range approx. 5–40 L/min at 70 bar valve pressure drop |
| Spool Configuration | Closed-center, zero-lapped critical spool for high-resolution metering |
| Command Signal | Analog ±10 V DC / ±10 mA or 4–20 mA, with integrated OBE electronics |
| Mounting & Connection | Standard ISO / Manufacturer Interface — subplate mounted, electrical connector per Moog standard |
Engineering Features & Advantages
- Precision Performance: Zero-lapped critical spool geometry and high-resolution torque motor deliver extremely fine flow metering, low hysteresis, and excellent repeatability for closed-loop position and force control.
- High Dynamic Response: Two-stage pilot architecture provides fast step response and high frequency bandwidth, enabling accurate tracking of rapidly changing command signals in servo axes.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- 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 R04K01M0HSM2MB0K1B1 configuration code designates a size 04 (NG6 / CETOP 3) high-response spool valve with integrated analog or fieldbus-compatible amplifier electronics, making it a direct drop-in motion control element for demanding closed-loop position, velocity, force, and pressure regulation tasks in industrial and mobile hydraulic systems.
PRODUCT IMAGES
MOOG D638-349-0002 / R04K01M0HSM2MB0K1B1 Servo Proportional Valve
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine MOOG D638-349-0002 / R04K01M0HSM2MB0K1B1 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.