Product Overview
The Rexroth M-3SEW6U3X/420MG24N9K22/SO850865 (R901290089) is a direct-operated solenoid directional seat valve from the proven Rexroth M-3SEW6 series, size NG6 (CETOP 3 / ISO 4401-03). Designed as a poppet-type seat valve, it provides leak-free sealing in the closed position and is used for the directional control of hydraulic fluid flow in industrial hydraulic systems. The valve is actuated by a wet-pin DC solenoid with a nominal voltage of 24 V DC (MG24 designation) and features a spring return with a defined rest position. The “U3X” code identifies the spool/seat configuration and series generation, while the “420” indicates a maximum operating pressure of 420 bar. With its high pressure rating, fast switching response, and zero-leakage seat design, this valve is engineered for demanding clamping, holding, and safety-related circuit functions where load retention and precise directional control are essential.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Solenoid Directional Seat Valve (Directional Control Valve) |
| Model Designation | M-3SEW6U3X/420MG24N9K22/SO850865 |
| Rexroth Part Number | R901290089 |
| Size / Interface | NG6 (CETOP 3 / ISO 4401-03-02-0-05) |
| Design Principle | Direct-operated poppet / seat valve, spring return |
| Operating Pressure | Up to 420 bar (max. working pressure, port P/A/B) |
| Solenoid Actuation | 24 V DC wet-pin solenoid (MG24), high switching force |
| Electrical Connection | DIN EN 175301-803 (ISO 4400) plug connector, K22 designation |
| Sealing Principle | Leak-free metallic seat sealing in closed position |
| Mounting & Connection | Subplate mounting, ISO 4401-03 / CETOP 3 standard interface |
Engineering Features & Advantages
- Precision Performance: The solenoid directional seat valve (directional control valve) 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 Rexroth standards, allowing straightforward retrofit into existing hydraulic systems without rework.
- Rated Capability: Rated for pressure ratings up to 420 bar, supporting stable operation across the full working range.
Typical Industrial Applications
Designed as a poppet-type seat valve, it provides leak-free sealing in the closed position and is used for the directional control of hydraulic fluid flow in industrial hydraulic systems.
PRODUCT IMAGES

Rexroth M-3SEW6U3X/420MG24N9K22/SO850865 / R901290089 Solenoid Directional Seat Valve
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Shop the genuine Rexroth M-3SEW6U3X/420MG24N9K22/SO850865 / R901290089 Solenoid Directional Seat Valve. This Germany-made 24 VDC hydraulic component features a direct-acting poppet design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.