Product Overview
The Rexroth DB 30-2-52/350 (Material Number R900504902) is a direct-operated pressure relief valve from the proven DB series, engineered by Bosch Rexroth for precise system pressure limitation and overload protection in industrial hydraulic circuits. This valve operates on a spring-loaded poppet principle: when system pressure acting on the valve seat exceeds the set spring force, the poppet lifts and routes excess flow to the tank port, thereby capping the maximum working pressure of the circuit. The DB 30-2-52/350 is a screw-in cartridge-style pressure control valve with a nominal pressure rating of 350 bar, making it suitable for high-pressure hydraulic power units, test stands, and compact manifold installations where reliable, repeatable pressure regulation is essential. As a pressure control valve, it does not generate flow but regulates it, protecting downstream components such as cylinders, motors, and proportional valves from pressure spikes and sustained overpressure conditions.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pressure Control Valve (Pressure Relief Valve) |
| Model Designation | DB 30-2-52/350 |
| Material Number | R900504902 |
| Manufacturer | Bosch Rexroth |
| Operating Pressure | Up to 350 bar (nominal setting per model code) |
| Actuation Principle | Direct-operated, spring-loaded poppet / seat design |
| Mounting & Connection | Screw-in cartridge, standard Rexroth cavity interface |
| Adjustment | Mechanical pressure setting via adjustment screw |
| Hydraulic Fluid | Mineral oil based hydraulic fluids (HL, HLP) per DIN 51524 |
Engineering Features & Advantages
- Precision Pressure Limiting: Direct-operated poppet design delivers fast, repeatable response to pressure surges, maintaining stable system pressure and protecting sensitive downstream components.
- High-Pressure Capability: Rated to 350 bar, the DB 30-2-52/350 is suited for demanding high-pressure circuits in compact manifold and cartridge block configurations.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with hardened seat and poppet surfaces for long service life and minimal internal leakage.
- Compact Cartridge Format: Screw-in design reduces manifold space requirements and simplifies integration into custom hydraulic power units and valve blocks.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in interchangeability for the R900504902 material number.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
The Rexroth DB 30-2-52/350 (Material Number R900504902) is a direct-operated pressure relief valve from the proven DB series, engineered by Bosch Rexroth for precise system pressure limitation and overload protection in industrial hydraulic circuits.
PRODUCT IMAGES
REXROTH DB 30-2-52/350 / R900504902 Pressure Relief Valve
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Shop the genuine REXROTH DB 30-2-52/350 / R900504902 Pressure Relief Valve. This German-made hydraulic component features a pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.