Rexroth 3DREP 3DREPE Proportional Valve | 3DREP6C-2X/25EG24N9K4 | NG6

The Rexroth 3DREP & 3DREPE Series from LIC Hydraulic are premier Direct-Operated Proportional Pressure Reducing Valves (NG6 / Size 6). Designed to convert an analog electric signal into a regulated pressure output, these valves are the industry standard for high-precision pilot control. Models like the 3DREP6C-20/25EG24N9K4/M allow for independent or simultaneous control of ports A and B. We provide 100% drop-in replacements, fully compatible with original Rexroth mounting (ISO 4401-03) and electrical specifications.

Technical Highlights

• Type: 3-way direct-operated proportional valve.

• Design: 3DREP (external amplifier) or 3DREPE (integrated OBE).

• Pressure Range: Standard $16\text{ bar}, 25\text{ bar}$, or $45\text{ bar}$.

• Mounting Pattern: NG6 / Size 6 / CETOP 03.

• Operating Voltage: 24V DC.

Core Advantages

• Direct-Acting Precision: By using a direct-acting proportional solenoid, the 3DREP eliminates the delays associated with pilot-operated designs, providing instantaneous pressure modulation and superior bandwidth.

• Exceptional Repeatability: Hardened internal components and precision-machined spool lands ensure that the pressure output remains consistent across thousands of cycles, minimizing drift.

• Integrated Electronics (OBE): The 3DREPE version features a factory-calibrated OBE module, offering simplified wiring and enhanced resistance to electromagnetic interference (EMI).

• Rugged Versatility: Rated for harsh industrial environments, these valves feature wet-pin solenoids for quiet operation, effective heat dissipation, and long seal life.

Expert Maintenance Tips

• Oil Cleanliness: To protect the precision-lapped spool and sleeve, maintain system oil cleanliness at ISO 18/16/13 or better. Silt and particles are the primary causes of spool sticking in proportional valves.

• Tank Line Pressure: For the 3DREP series, the tank (T) port should be connected directly to the reservoir with minimal back-pressure. Excessive T-port pressure will directly influence the pressure regulation accuracy.

• Amplifier Settings: When using the standard 3DREP with an external amplifier, ensure the dither frequency is set correctly. Proper dither settings are crucial for reducing friction and achieving the lowest possible hysteresis.