Rexroth DR10 DR20 DR30 Pressure Reducing Valve | DR10-4-4X/100YM | Pilot Operated
| Model Number | DR10-5-5X/100YM, DR10-4-4X/100YM |
|---|
Product Description
The Rexroth DR Series from LIC Hydraulic is a premier line of Pilot Operated Pressure Reducing Valves, engineered to reduce a high primary pressure to a stable, lower secondary pressure. Available in sizes from DR10 to DR32, these valves are essential for protecting low-pressure actuators within a high-pressure system. Models like the DR10-4-4X/100YM are renowned for their reliability and precision. We provide 100% drop-in replacements that match original Rexroth mounting patterns (ISO 5781), flow ratings, and pressure control characteristics.
Technical Highlights
Sizes: 10, 16, 20, 25, 30, 32.
Max Operating Pressure: Up to $315\text{ bar}$ ($4565\text{ psi}$).
Flow Capacity: High flow throughput with minimal pressure drop.
Type: Subplate mounting for easy manifold integration.
Core Advantages
Precision Pressure Regulation: The pilot-operated mechanism ensures that the secondary pressure remains virtually constant even when the primary pressure fluctuates or the flow rate changes significantly.
Rugged Industrial Design: Featuring a high-strength cast iron body and hardened internal spools, the DR series is built for long-term service in harsh environments like steel mills and heavy manufacturing.
Low Hysteresis: Precision-lapped pilot and main spools minimize internal friction, providing a smooth and repeatable pressure setting.
External Pilot Oil Drain: The “Y” version ensures that the pilot oil is drained independently to the tank, preventing back-pressure from affecting the valve’s accuracy.
Expert Maintenance Tips
Drain Line (Y Port): For stable performance, always connect the Y-drain port directly to the reservoir. Back-pressure in the drain line will cause the secondary pressure setting to drift higher.
Minimum Pressure Differential: To ensure the pilot stage functions correctly, a minimum pressure difference (typically $10\text{–}20\text{ bar}$) between the inlet and outlet is recommended.
Filtration Integrity: Maintain oil cleanliness at ISO 18/16/13. The small pilot orifices in the DR10 series are sensitive to silt, which can lead to “hunting” or erratic pressure control.
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