DBDS10P1X/315 Rexroth Direct Relief Valve 315bar

Product Overview

Models such as DBDS6G, DBDH6G, DBDH8G, DBDH10G and DBDS10P1X/315 (R900424158) belong to the Bosch Rexroth DBD series of direct-operated pressure relief valves. Featuring a poppet seat design with adjustable spring, they comply with relevant ISO mounting standards. Every unit undergoes rigorous 100% simulated operating-condition testing and offers excellent drop-in interchangeability with equivalent direct-operated relief valves. The precision damping piston effectively suppresses pressure oscillations, ensuring reliable system pressure limitation to the set value for medium-to-high-pressure hydraulic systems.

Technical Specifications

• Model examples: DBDS6G, DBDH6G, DBDH8G, DBDH10G, DBDS10P1X/315 (R900424158)
• Valve type: Direct-operated pressure relief valve (poppet seat design)
• Nominal size: NG6, NG8, NG10
• Mounting style: G = threaded connection; P = subplate mounting
• Adjustment type: S = sleeve with hexagon and protective cap; H = handwheel
• Maximum operating pressure: up to 315 bar, 400 bar or 630 bar depending on model and pressure stage
• Maximum flow: approx. 120 l/min for NG10 (see characteristic curves)
• Pressure adjustment ranges: staged design (25/50/100/200/315/400/630 bar)
• Actuation: Mechanical spring direct operation
• Seal material: NBR (standard) or FKM
• Weight: approx. 3.68 kg for NG10 subplate version
• Hydraulic fluid compatibility: HL, HLP, HLPD, HVLP, HVLPD, HFC, etc.
• Fluid temperature range: –30 °C to +80 °C (NBR)

Key Technical Advantages

1. Direct-operated poppet seat design: Fast response and reliable sealing; damping piston effectively suppresses pressure oscillations and noise for improved system stability.
2. Wide pressure staging and precise adjustment: Multiple spring stages cover 25–630 bar; hexagon or handwheel adjustment allows accurate setting.
3. Excellent drop-in interchangeability: Strict compliance with Rexroth standard mounting dimensions and interfaces allows direct replacement of equivalent DBD series relief valves, minimizing modification costs and downtime.
4. High flow capacity and contamination resistance: Optimized flow passages support high flow rates with low internal leakage, suitable for typical industrial fluid cleanliness levels.
5. Flexible mounting and adjustment options: Available in threaded or subplate versions with hexagon or handwheel adjustment to suit diverse system layouts and operating needs.

Application Areas

Injection moulding machines, die-casting machines, metal-forming equipment, machine-tool hydraulics, hydraulic power units, mobile equipment, marine hydraulics and other medium-to-high-pressure circuits requiring reliable pressure limitation and system protection.

Expert Maintenance Tips

1. Ensure interfaces are clean and seals are intact before installation; for subplate mounting, use specified bolts and tighten to the recommended torque to prevent external leakage.
2. Maintain recommended fluid cleanliness per ISO 4406; use hydraulic fluids compatible with the installed seal material. Verify the set pressure before first start-up.
3. Adjust pressure slowly while monitoring a pressure gauge; after setting, tighten the lock nut and refit the protective cap.
4. Periodically inspect the valve body and adjustment mechanism for leakage or sticking; clean and protect the valve during long-term storage.
5. Do not disassemble the spring and seat assembly. Seal replacement or repairs should be performed only by technicians experienced with Rexroth products; always perform pressure setting and functional tests before returning the valve to service.