Product Overview
The Rexroth R900975491 is a high-performance proportional directional valve from the renowned Bosch Rexroth WRZ series, engineered for precise electro-hydraulic control of flow direction and magnitude in demanding industrial hydraulic systems. Utilizing a direct-operated proportional solenoid with position feedback, this valve delivers infinitely variable spool positioning proportional to the electrical input signal, enabling smooth acceleration and deceleration of actuators without pressure spikes or shock loads. The R900975491 is designed as a 4-way, 3-position (4/3) directional control valve with a closed-center spool configuration, making it ideal for position, velocity, and force control applications where accurate metering and repeatable performance are critical. As a core component in Rexroth’s proportional valve portfolio, it integrates seamlessly with proportional amplifiers and closed-loop control systems, offering excellent dynamic response, low hysteresis, and superior flow linearity for advanced industrial automation.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (4/3 Way, Closed Center) |
| Model Designation | Rexroth R900975491 |
| Operating Pressure | Up to 315 bar (nominal), 350 bar (peak) — standard industrial grade |
| Nominal Flow Rate | Proportional flow up to 80 L/min (dependent on pressure differential) |
| Actuation Type | Proportional solenoid with inductive position feedback |
| Mounting & Connection | ISO 4401 / CETOP 5 (NG10) subplate mounting; DIN 43650 electrical connector |
| Control Signal | ±10 V DC or 4–20 mA (via external proportional amplifier) |
| Hysteresis | ≤ 3% of nominal stroke |
| Response Time | ≤ 25 ms (typical, at 100% step input) |
| Fluid Temperature Range | -20°C to +80°C (mineral oil, HLP/HM per DIN 51524) |
| Filtration Requirement | ISO 4406 Class 18/16/13 or better |
Engineering Features & Advantages
- Precision Performance: The proportional directional valve (4/3 way, closed center) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- 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: Precision-manufactured to original Rexroth specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
As a core component in Rexroth’s proportional valve portfolio, it integrates seamlessly with proportional amplifiers and closed-loop control systems, offering excellent dynamic response, low hysteresis, and superior flow linearity for advanced industrial automation.
PRODUCT IMAGES
Rexroth R900975491 Proportional Directional Valve
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- 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 Rexroth R900975491 Proportional Directional Valve. This Germany-made 24V DC hydraulic component features a 4-way proportional design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.