I. Product Overview
TheDBDH10P series direct-acting relief valvesare high-performance pressure control components designed specifically for low-flow hydraulic systems. Developed and manufactured by companies such as Shanghai Shuangxu Electronics Co., Ltd., their core functions include constant-pressure relief, pressure stabilization, system unloading, and safety protection. They are widely applied in construction machinery, metallurgical equipment, injection molding machines, and other fields.
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II. Key Features
1. Rapid Response & High Precision
• Utilizes a direct-acting structure where the valve spool is directly balanced by system pressure and spring force, ensuring fast response and high pressure stability. Ideal for applications requiring precise pressure regulation.
• Available in multiple pressure ratings (e.g., 25, 50, 100, 200, 315 MPa) for flexible selection based on actual needs.
2. Compact Design & Low Noise
• Features a conical or ball valve structure with a pressure range of 2.5–63 MPa and excellent flow characteristics, minimizing noise.
• Compact design saves installation space and supports plate-mounted, pipe-mounted, and cartridge-style connections for easy integration into existing equipment.
3. Flexible Adjustment & Remote Control
• Offers three pressure adjustment methods:
• Hexagonal adjusting bolt with protective cover
• Lockable adjusting handle
• Standard adjusting handle
• Supports internal and external drainage control modes, enabling remote unloading via the external control port "X" for multi-stage control in complex hydraulic systems.
4. Durability & Reliability
• Constructed from high-strength materials with strong flow capacity, reducing pressure loss and extending service life.
• Modular design facilitates quick maintenance, minimizing downtime risks.
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III. Technical Specifications
• Nominal Diameter: 10 mm
• Connection Type: Plate-mounted (some models support threaded connections)
• Pressure Range: 2.5–63 MPa (varies by model)
• Temperature Range: 30–90°C
• Material: Cast iron valve body with corrosion-resistant spool
• Flow Characteristics: Complies with orifice flow formula (q = KA·Δpm), ensuring high flow capacity and low pressure loss.
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IV. Applications
1. Fixed Displacement Pump Systems
• Works in parallel with throttling components to maintain stable system pressure via constant relief, preventing equipment damage from overpressure.
2. Variable Displacement Pump Systems
• Serves as a safety valve to protect hydraulic pumps and actuators from system overload.
3. Complex Hydraulic Systems
• Enables multi-stage pressure switching via remote control port "X," suitable for accumulator pressure protection, remote pressure regulation, and other scenarios.
4. Typical Applications
• Construction machinery (e.g., excavators, loaders), metallurgical equipment, injection molding machines, marine hydraulic systems, etc.
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V. Model Examples
• DBDH10P10B/200: Maximum operating pressure of 200 MPa, suitable for medium-to-high-pressure systems.
• DBDH10P1X/315: Maximum operating pressure of 315 MPa, designed for high-pressure applications.
• DBDH10P10B/50: Maximum operating pressure of 50 MPa, ideal for low-pressure systems.
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VI. Selection & Installation Guidelines
1. Selection Criteria
• Choose the appropriate model based on system pressure and flow requirements, ensuring pressure rating compatibility.
• Verify connection type (plate-mounted/threaded) and installation space constraints.
2. Installation Requirements
• Inspect the valve’s model, nominal diameter, and pressure rating for compliance with system specifications before installation.
• Ensure clean hydraulic oil to prevent spool wear from contaminants.
• Regularly check pressure adjustment mechanisms to avoid loosening or jamming.
