Rexroth DRC & 3DR Series Pressure Reducing Valve | DRC4-5X/200Y 3DR10P4-6X | Hydraulic Control Valve

Chengyuan Hydraulic presents the DRC and 3DR series pressure reducing valves, meticulously engineered as high-performance replacements for Rexroth industrial standards. This lineup includes elite models such as DRC4-5X/200Y (R900918520) and 3DR10P4-62/200Y (R900917787). These valves are essential for maintaining a stable, reduced secondary pressure in a hydraulic system, regardless of primary circuit fluctuations. Chengyuan guarantees 100% Drop-in Interchangeability in terms of ISO 4401 mounting interfaces, physical dimensions, and control logic. Backed by our 100% Simulation Load Testing, each valve is validated for precise regulation, linear response, and zero-drift performance, offering a cost-effective yet premium alternative to original Rexroth components.

Technical Specifications 

• Corresponding Model Codes: DRC4-5X / 3DR10P4-62

• Part Number Reference: R900918520 / R900917787

• Nominal Size (NG): Size 4 / Size 10

• Max Inlet Pressure (Port P): 31.5 MPa (315 Bar)

• Pressure Reduction Range: Up to 20 MPa (200 Bar)

• Max Flow Rate: 30 L/min (DRC4) / 80 L/min (3DR10)

• Actuation Type: Direct-operated / Pilot-operated

• Drain Type: Y (External drain)

• Seal Material: NBR or FKM (Viton)

Key Technical Advantages:

• High-Precision Spool Regulation: The spools are crafted from heat-treated alloy steel and precision-ground to achieve micron-level fit. This ensures excellent linearity and repeatability of the output pressure even during flow fluctuations.

• Superior Dynamic Response: Optimized internal flow paths and damping orifices allow the valve to react instantly to primary pressure spikes, preventing over-pressurization of the secondary circuit and protecting sensitive actuators.

• Low Pressure-Drop Geometry: The valve body features smooth internal casting curves to minimize localized resistance, enhancing the overall energy efficiency of the hydraulic power unit.

• Extended Valve Seat Life: Critical seating areas undergo surface hardening, providing high resistance to erosion. This ensures long-term sealing integrity even when operating with fluids containing minor particulate matter.

Application Areas:

• Machine Tool Systems: Precise pressure control for clamping mechanisms, auxiliary axes, or tool turrets.

• Automated Production Lines: Providing stable power for specific low-pressure cylinders within multi-actuator systems.

• Plastic Machinery: Pressure reduction for pilot control circuits in injection molding machines and presses.

• Testing Equipment: Maintaining stable pressure for high-precision sensors and experimental apparatus.

Expert Maintenance Tips:

• External Drain Connection: For models designated with “Y,” the external drain line MUST be connected directly to the reservoir. Do not merge the drain line with return lines to avoid backpressure-induced pressure drift.

• Filtration Standards: Pressure reducing valves are highly sensitive to contamination. We recommend system filtration of 10μm or better to prevent spool sticking and loss of pressure control.

• Pressure Adjustment Protocol: Always adjust the setting from low to high. Avoid forcing the adjustment screw against a locked high-pressure state to prevent damage to the internal spring and sealing surfaces.