DBDS10K1X/315 Rexroth Direct Operated Relief Valve

Product Overview

The DB, DBDS, DBDH, DB10, DBW10, DBDS 10K 1X/315, DBDS 20 K1X/350E and R900769431 belong to the Bosch Rexroth DBD series of direct-operated pressure relief valves. These poppet or ball-seat valves limit system pressure to protect hydraulic components from overpressure. Available in screw-in cartridge, threaded or subplate mounting with various adjustment options (hexagon screw, rotary knob, etc.). Fully interchangeable with original Rexroth DBD units, every valve undergoes 100% simulated operating-condition testing for reliable high-pressure safety protection.

Technical Specifications

• Model: DBDS 10 K1X/315 / DBDS 20 K1X/350E / DBDH etc. (DBD series)
• Type: Direct-operated pressure relief valve (poppet or ball seat)
• Nominal size: NG6…30 (common sizes 10, 20)
• Maximum operating pressure: up to 630 bar (model-dependent; DBDS10K1X/315 set to 315 bar)
• Maximum flow: up to 330 L/min (size-dependent)
• Pressure stages: 25 / 50 / 100 / 200 / 315 / 350 / 400 / 630 bar
• Mounting: Screw-in cartridge (K), threaded or subplate
• Adjustment type: Hexagon with protective cap, rotary knob, lockable rotary knob etc.
• Seal material: NBR or FKM
• Weight: approx. 0.3 kg to several kg (size-dependent)
• Viscosity range: 10–800 mm²/s
• Fluid cleanliness: ISO 4406 20/18/15

Key Technical Advantages

1. Direct-acting fast response: Poppet or ball-seat design provides rapid response, ideal for high-pressure safety protection.
2. Wide pressure range and flexible adjustment: Multiple pressure stages and adjustment elements allow precise on-site setting.
3. High interchangeability and flexible mounting: Fully compatible with original Rexroth DBD series; supports cartridge, threaded and subplate installation.
4. 100% functional verification under simulated conditions: Every unit is fully tested across pressure-flow characteristics before shipment, ensuring consistency and reliability.

Application Areas

• Main circuit overpressure protection in hydraulic systems
• Pump outlet safety relief
• High-pressure protection of actuators
• Safety circuits on injection molding, die-casting and hydraulic presses
• Pressure limiting on industrial and mobile hydraulic equipment

Expert Maintenance Tips

Ensure clean mounting cavity or threads and tighten to the specified torque. Maintain fluid cleanliness at ISO 4406 20/18/15. Adjust pressure gradually to avoid sudden overpressure. Periodically check set pressure for drift. If leakage or pressure instability occurs, first inspect seals and fluid contamination. For long-term storage keep the valve filled with oil. Always use original-specification NBR or FKM seals when servicing.