I. Model Designation
• DBE: Indicates a proportional relief valve with a pilot-operated structure.
• M: Features maximum pressure limiting functionality to ensure system safety.
• 20: Nominal size of 20mm, suitable for medium-flow hydraulic systems.
• 7X: Component series number, typically associated with valve body structure or design version, ensuring consistent installation and connection dimensions.
II. Technical Features
1. Pilot-Operated Structure
• Comprises a pilot valve and main valve. The pilot valve controls the main valve's opening pressure via a proportional solenoid, enabling precise system pressure regulation.
• Offers superior performance in high-pressure, high-flow applications compared to direct-acting valves, though with slightly slower response times.
2. Proportional Solenoid Control
• Regulates solenoid force through an input current signal (e.g., 0-20mA or 0-10V), causing the spool to displace proportionally for continuous overflow pressure adjustment.
• Supports dither signals to reduce spool sticking and enhance dynamic response.
3. Integrated Electronic Control (OBE)
• Certain models (e.g., DBEME series) incorporate built-in electronic control units to optimize target pressure characteristic curves and allow independent adjustment of pressure rise and fall ramp times.
• High command-to-pressure linearity and tight manufacturing tolerances ensure precise control.
4. High Pressure and Flow Capacity
• Maximum operating pressure: Up to 350 bar (some models even higher), meeting the demands of high-pressure hydraulic systems.
• Maximum flow rate: Up to 400 L/min (depending on nominal size and series), suitable for high-flow scenarios.
5. Modular Design
• Compact valve body for easy installation and integration into hydraulic systems.
• Supports subplate mounting with port patterns conforming to ISO 6264 standards for seamless system interface connectivity.
6. Environmental Adaptability
• Operating temperature range: -20°C to +70°C (may vary by model), accommodating diverse working environments.
• Coil resistance: Approximately 12Ω (for 24V models), ensuring stable operation.
III. Applications
1. Industrial Hydraulic Systems
• Used in rolling mill press-down systems and balance systems to precisely control roll pressure and balancing forces, improving product quality.
• Provides stable pressure sources for hydraulic test benches to meet testing requirements.
2. Injection Molding Machines
• Regulates injection and holding pressures to ensure uniform plastic mold filling, enhancing product dimensional accuracy and surface finish.
3. Construction Machinery
• Applied in hydraulic circuits of excavators, cranes, and other equipment for pressure control and overload protection.
4. Metallurgical Industry
• Operates reliably under high-pressure, high-temperature conditions, adapting to harsh industrial environments.
IV. Selection and Configuration Guidelines
1. Pressure and Flow Matching
• Select a model (e.g., DBEM20-7X/350G24K31) based on the system's maximum operating pressure and flow requirements.
• Ensure the valve's rated pressure and flow capacity cover the operational conditions.
2. Control Signal Type
• Current signals (0-20mA) or voltage signals (0-10V) require an amplifier for use.
• For integrated electronic control, choose models with OBE (e.g., DBEME series).
3. Environmental Adaptability
• Select sealing materials (e.g., FKM seals for high-temperature applications) based on the operating temperature range.
• Opt for ATEX-certified models for explosive environments to ensure safety.
4. Connectors and Installation
• Choose connector types (e.g., DIN 43650 or EDIN 43563) based on system interface standards.
• Verify installation method (subplate mounting or threaded connection) compatibility with system requirements.
V. Typical Model Parameters (DBEM20-7X/350G24K31 Example)
【表格】
Parameter Value
Nominal Size 20mm
Rated Pressure 350 bar
Maximum Flow Rate 400 L/min
Coil Voltage 24V DC
Control Signal 0-20mA or 0-10V
Connector Type DIN 43650
Integrated Electronics Yes (OBE)
Ramp Time Adjustment
Independent rise/fall control
