Product Overview
The Rexroth DBDH 20 K 18/315 (Material Number: R900424111) is a direct operated pressure relief valve designed to protect hydraulic systems against excessive pressure and to limit working pressure to a preset value. As part of the Rexroth DBDH series, this valve operates on a proven poppet-type, spring-loaded principle: system pressure acts directly on the valve poppet, and when the force generated exceeds the adjustable spring force, the poppet lifts off its seat, allowing fluid to discharge to the tank port and thereby maintaining system pressure at the set level. The “DBDH” designation identifies a direct operated pressure relief valve with a threaded cartridge-style connection, the “20” refers to the nominal size (NG20), and the “315” indicates a pressure adjustment range up to 315 bar. This valve is engineered for precise pressure control, fast response, and reliable overpressure protection in demanding industrial hydraulic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve – Direct Operated Pressure Relief Valve (Pressure Control Valve) |
| Model Designation | DBDH 20 K 18/315 |
| Material Number | R900424111 |
| Nominal Size | NG20 (DIN 24340 / ISO 4401 interface) |
| Pressure Adjustment Range | Up to 315 bar (spring range per model code “315”) |
| Operating Pressure | Standard Industrial Grade (rated to 315 bar maximum) |
| Actuation Principle | Direct operated, spring-loaded poppet with adjustable set pressure |
| Mounting & Connection | Threaded cartridge / subplate mounting per manufacturer interface |
| Adjustment Type | Manual adjustment (screw with locknut / optional hand knob) |
| Hydraulic Fluid | Mineral oil based hydraulic fluids (HL, HLP) per DIN 51524 |
Engineering Features & Advantages
- Precise Pressure Limiting: Direct acting poppet design delivers accurate, repeatable pressure setting and fast response to pressure surges, protecting downstream components from overpressure damage.
- Adjustable Set Pressure: Spring-loaded adjustment mechanism allows fine tuning of the cracking pressure up to 315 bar, with stable performance across the full adjustment range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
Typical Industrial Applications
This valve is engineered for precise pressure control, fast response, and reliable overpressure protection in demanding industrial hydraulic circuits.
PRODUCT IMAGES
REXROTH DBDH 20 K 18/315 / R900424111 Direct Operated Pressure Relief Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH DBDH 20 K 18/315 / R900424111 Pressure Relief Valve. This German-made hydraulic component features a pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.