Short Description
Premium factory-direct aftermarket DFRL (and DFR/DFR1) Load Sensing Control Valve Regulators, engineered as 100% precision drop-in replacements for Bosch Rexroth A10VO & A10VSO axial piston pumps. Specifically designed to optimize system efficiency through precise multi-circuit load sensing and mechanical stroke limiting, our DFRL controllers restore factory-level responsiveness, eliminate pressure lag, and prevent unnecessary system overheating in mobile construction machinery and industrial power packs.
Key Highlights
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100% Drop-In Blueprint Alignment: Manufactured strictly to original Rexroth frame metrics and mounting bolt configurations. Replaces old, sticking, or leaking DFR/DFRL valve blocks instantly with zero hydraulic line modifications.
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Precise Dynamic Response & Hysteresis Control: Internal spools and spring groups undergo rigid hardening and micro-lapping processes, ensuring ultra-low hysteresis, crisp stroking speed, and flawless tracking of the remote X-port load signals.
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Integrated Maximum Stroke Adjustment (L-Spec): Equipped with a heavy-duty mechanical stroke limitation screw, allowing maintenance crews to accurately dial down and limit maximum pump displacement to prevent actuator over-speeding.
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Heavy-Duty Wear Resistance: The regulator block housing is forged from high-density, anti-cavitation alloy steel, maintaining structural sealing integrity even under continuous standby pressures and sudden system shock-loads up to 350 bar.
Technical Parameters Matrix
| Technical Attribute | Specification Data |
|---|---|
| Regulator Type Code | DFRL / DFR / DFR1 Series |
| Control Functionality | Load Sensing (LS) Control + Pressure Limiter + Stroke Limiting |
| Compatible Pump Models | Rexroth A10VO & A10VSO Axial Piston Pumps |
| Supported Displacement Sizes | Size 18 / 28 / 45 / 71 / 100 / 140 / 180 |
| Compatible Pump Series | Series 31, Series 32, Series 52, Series 53 |
| Pilot Port Thread | Standard Metric / G-Thread options for remote X load line |
| Seal Material | High-Temperature FKM (Viton) Included |
FAQ
Q1: What is the main difference between a DFR and a DFRL control valve? A: Both valves feature load-sensing and pressure-limiting control capabilities. However, the DFRL version features an additional internal mechanical stroke limiter (L). This includes an external adjustment screw allowing you to mechanically limit and adjust the maximum flow output of your A10VO/A10VSO pump, whereas a standard DFR valve relies solely on full dynamic system displacement.
Q2: Does this control valve fit across all Rexroth A10VO pump series? A: The internal port layouts and mounting orientation of regulators can vary slightly between different design iterations (such as Series 31 vs. Series 52). To ensure 100% plug-and-play alignment, please share the full model code printed on your current pump tag (e.g., A10VO71DFRL/31R-VSC12N00) with our engineering desk prior to dispatch.
