Product Overview
The Rexroth 4WRZ 16 W8-150-72/6EG24N9K4/D3M (Material Number R900728586) is a pilot-operated, two-stage proportional directional valve designed for precise, continuous control of flow direction and magnitude in industrial hydraulic systems. Manufactured by Bosch Rexroth, this valve belongs to the proven 4WRZ series, which utilizes a high-performance proportional solenoid to actuate the main spool via a pilot stage, delivering infinitely variable flow control proportional to the electrical input signal. With a nominal size of NG16 and a rated flow capacity of 150 L/min at a 10 bar pressure differential, this valve serves as a critical control element in demanding applications requiring smooth acceleration, deceleration, and accurate velocity regulation of hydraulic actuators. The integrated design features a spring-centered main spool, a pilot valve with wet-pin proportional solenoids, and an optional integrated pressure reducing valve for pilot oil supply, ensuring stable and repeatable performance across the full operating envelope.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (Pilot-Operated, Two-Stage) |
| Model Designation | 4WRZ 16 W8-150-72/6EG24N9K4/D3M |
| Material Number | R900728586 |
| Nominal Size | NG16 (DIN 24340 / ISO 4401) |
| Spool Type / Flow Characteristic | W8 (Progressive flow characteristic, closed center) |
| Rated Flow at Δp = 10 bar | 150 L/min (per land, nominal) |
| Operating Pressure | Up to 315 bar (main stage, standard industrial grade) |
| Pilot Pressure | Typically 25–50 bar (external or internal, depending on configuration) |
| Solenoid Voltage | 24 V DC (EG24 designation) |
| Electrical Connection | N9K4 – DIN EN 175301-803 (ISO 4400) plug-in connector, with integrated rectifier |
| Mounting & Connection | Subplate mounting, ISO 4401-07-04-0-94 (NG16), 4-way, 3-position |
Engineering Features & Advantages
- Precision Performance: The proportional directional valve (pilot-operated, two-stage) 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 OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
- Rated Capability: Rated for pressure ratings up to 315 bar and flow rates up to 150 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
With a nominal size of NG16 and a rated flow capacity of 150 L/min at a 10 bar pressure differential, this valve serves as a critical control element in demanding applications requiring smooth acceleration, deceleration, and accurate velocity regulation of hydraulic actuators.
PRODUCT IMAGES
Rexroth 4WRZ 16 W8-150-72/6EG24N9K4/D3M / R900728586 Proportional Directional Valve
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Shop the genuine Rexroth 4WRZ 16 W8-150-72/6EG24N9K4/D3M / R900728586 Proportional Directional Valve. This Germany-made 24 VDC hydraulic component features a pilot-operated design with position feedback, delivering leak-free, reliable fluid control for heavy-duty industrial systems.