Rexroth 5-4WE 10 EB50/EG24N9K4/M Valve MNR R901339865

Rexroth 5-4WE 10 EB50/EG24N9K4/M Directional Control Valve (MNR: R901339865)

The Bosch Rexroth 5-4WE 10 EB50/EG24N9K4/M (Material Number: R901339865) is an industrial-grade, direct-operated 4-way, 3-position directional spool valve designed for critical fluid routing in heavy-duty offshore, marine, and stationary hydraulic power packs.

Featuring a specialized 5-chamber casting design (Series 5X/50), this valve incorporates an internal fluid bypass channel connecting the spring chambers. This hydraulic architecture dampens rapid spool shifts, minimizing hydraulic shock, pressure spikes, and line hammer during rapid cycle switching. Actuated by high-efficiency, oil-immersed wet-pin DC solenoids (24 V DC), the valve delivers reliable start, stop, and directional control of high-pressure fluid lines up to 350 bar (5,076 psi) at nominal flow rates up to 150 L/min (39.6 GPM).

Key Features

1. 5-Chamber Hydraulic Cushioning: Integrated fluid equalization bores dampen transition surges, mitigating high-pressure water-hammer damage across connected piping and hydraulic valves.
2. High Working Pressure Capability: Rated up to 350 bar (5,076 psi) on high-pressure supply and service lines (P, A, B) with continuous duty wet-pin solenoids.
3. Dry-Coil Maintenance Flexibility: Wet-pin armature tube architecture allows electrical coil rotation (360°) and solenoid coil replacement without draining or opening the hydraulic pressure circuit.
4. Zero-Leakage Sealed Manual Override (N9): Protected, recessed push-pins enable manual spool actuation for testing, commissioning, or emergency override in wet, harsh environments.
5. Universal Standardized Subplate Mounting: ISO 4401-05-04-0-05 and CETOP D05 footprint allows drop-in compatibility across international industrial manifolds.

Direct Manifold Compatibility

• ISO 4401-05-04-0-05
• NFPA T3.5.1 M R1 D05
• DIN 24340 Form A10
• Subplate models: Rexroth G 66/01 (G 3/8), G 67/01 (G 1/2), G 534/01 (G 3/4)

Frequently Asked Questions

What distinguishes the 5-4WE 10 series from standard 4WE 10 valves?

The “5-” designation signifies an engineered 5-chamber valve housing. Unlike 4-chamber valves where rapid valve shifts can create hydraulic line shock, the 5th chamber allows controlled oil transfer between spring compartments. This design dampens switching spikes, making it ideal for marine deck winches, cranes, and high-inertia actuators.

What is the function of the “EB” spool designation?

The “EB” spool is a 3-position, 4-way spool configuration where in the center (de-energized) state, all ports (P, A, B, and T) are completely blocked. This prevents actuator movement and locks hydraulic circuits when electrical power is removed.

Can the solenoid coils be replaced while the hydraulic system is pressurized?

Yes. Because this valve utilizes a wet-pin design with an independent pressure-tight armature core tube, you can loosen the knurled retaining ring and slide the 24V DC coil off without opening the hydraulic circuit or spilling oil.

What mounting pattern does this valve use?

This valve mounts to the standard ISO 4401-05-04-0-05 (CETOP 05 / NG10 / NFPA D05) interface. It is a direct drop-in replacement on any manifold drilled to this worldwide specification.

What torque should be used for the valve mounting bolts?

Use four M6 Grade 10.9 socket head cap screws torqued to 12.5 Nm (±10%) in a crosswise pattern.