Rexroth DBDS & DBDH Relief Valve | DBDS-6K | DBDH-10K | 315 bar 400 bar | Direct Operated Cartridge Valve

DBDS & DBDH Series Direct-Operated Relief Valves

Product Overview: The DBDS and DBDH series are high-precision, direct-operated relief valves engineered for pressure limitation and safety protection in hydraulic systems. Featuring a screw-in cartridge design, these valves can be integrated directly into manifold blocks, significantly saving installation space. The DBDS model is equipped with an internal hex adjustment bolt and a protective cap, ideal for applications where pressure settings remain fixed. In contrast, the DBDH model features an ergonomic handwheel, allowing operators to manually adjust pressure as needed for different processes.

Featured models: DBDS-6K-18/315, DBDH-6K-18/315, DBDH-10K-10/315, and DBDH-10K-10/400.

Key Technical Advantages:

• Millisecond Dynamic Response: The direct-acting design eliminates pilot-stage lag, opening instantly during pressure overloads to provide immediate protection for pumps and actuators.

• High-Pressure Capability: Specifically, the DBDH-10K…/400 model supports system pressures up to 400 bar (40 MPa), meeting the demands of ultra-high pressure hydraulic tools.

• Versatile Adjustment Styles: Offers a choice between the concealed bolt (DBDS) and the exposed handwheel (DBDH), balancing system security with adjustment convenience.

• Low Hysteresis & High Stability: Precision-ground spools paired with heavy-duty springs ensure minimal pressure drop variance during the opening and closing cycles.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • DBDS-6K-18/315: Size 6, Screw-in, Series 18 design, max pressure setting 315 bar.

  • DBDH-10K-10/400: Size 10, Screw-in, Handwheel adjustment, supports 400 bar ultra-high pressure protection.

  • DBDH-6K-18/315: Size 6, Handwheel version, pressure limit 315 bar.

• Core Technical Specs:

  • Mounting Interface: Standard screw-in cartridge cavity.

  • Max Flow Capacity: Approx. 50 L/min for Size 6 and up to 120 L/min for Size 10.

  • Pressure Ranges: Available in gradients including 100 bar, 200 bar, 315 bar, and 400 bar.

  • Fluid Temperature Range: -20°C to +80°C (-4°F to +176°F).