Rexroth DBET Series Proportional Relief Valve | DBET-6X/350G24K4V DBET-6X/315Y | Hydraulic Pressure Control

The DBET Series by Chengyuan Hydraulic is a high-precision, direct-operated electro-hydraulic proportional relief valve, engineered for seamless remote and continuous pressure regulation. Fully compliant with Rexroth 6X series standards, our valves provide 100% original-place interchangeability for models including DBET-6X/350G24K4V and DBET-6X/420G24K4V. By converting electrical signals into mechanical force through a proportional solenoid, the DBET valve delivers a linear pressure-current output. At Chengyuan, every valve undergoes 100% simulated condition testing to guarantee minimal hysteresis and superior repeatability for intelligent hydraulic control systems.

Technical Specifications

• Series Code: DBET-6X Series (Direct-operated)

• Nominal Size: NG6 (ISO 4401-03)

• Max Operating Pressure: $31.5\text{ MPa / }35\text{ MPa / }42\text{ MPa}$ (315 / 350 / 420 bar)

• Max Flow Rate: $2\text{ L/min}$ (Optimized for pilot control applications)

• Input Voltage: DC 24V

• Rated Current: $1.6\text{ A}$ (Typical)

• Hysteresis: $\le 3\%$

• Repeatability: $\le 1\%$

• Seal Material: FKM (Viton, V-coded)

• Mounting Configuration: Subplate mounting

Key Technical Advantages

• Superior Proportional Accuracy: The oil-immersed proportional solenoid ensures smooth, stepless pressure adjustment. This significantly reduces hydraulic shock compared to traditional mechanical switching valves.

• Extreme Pressure Capability: The valve body is crafted using high-strength precision casting, supporting system pressures up to $42\text{ MPa (6090 psi)}$, meeting the demands of modern heavy-duty hydraulic power units.

• Ultra-Low Hysteresis Design: The spool and bore are precision-ground with micron-level tolerance. Specialized surface hardening minimizes mechanical friction, ensuring that pressure curves during loading and unloading remain highly consistent.

• Robust Contamination Resistance: The simplified direct-operated structure is less sensitive to fluid particles than pilot-operated designs, maintaining stable regulation even in harsh industrial environments.

Application Areas

• Plastic & Die Casting: Remote pilot pressure control for injection and clamping circuits.

• Metallurgical Plants: Rolling mill pressure regulation systems requiring continuous tuning.

• General HPU: Any hydraulic power unit requiring real-time, automated pressure adjustments based on process cycles.

Expert Maintenance Tips

• Electronic Calibration: For optimal performance, use a dedicated proportional amplifier (such as VT series) and configure appropriate dither settings to virtually eliminate mechanical stiction.

• Air Bleeding: During initial installation or after long periods of inactivity, loosen the air bleed screw at the end of the solenoid to exhaust trapped air. This prevents pressure oscillation and instability.

• Fluid Temperature Management: As proportional valves can generate localized heat during small-opening operation, ensure system oil temperatures are maintained between $20\text{°C}$ and $70\text{°C}$.