Product Overview
The Rexroth DB20-2-5X/315 (Material No. R900593530) is a pilot operated pressure relief valve from the proven DB series, designed to limit and safely control system pressure in industrial hydraulic circuits. The valve operates on a two-stage principle: a main poppet stage is held closed by system pressure until the adjustable pilot stage, set via a spring-loaded pilot poppet, opens and relieves the main stage, allowing full flow to discharge to tank. This design delivers smooth, stable pressure regulation with minimal pressure override and low hysteresis, protecting pumps, cylinders, and downstream components from overpressure events. The DB20-2-5X/315 is configured for a nominal pressure setting of 315 bar and belongs to the 5X series (component series 50 to 59), which is form, fit, and function interchangeable with earlier DB20 designs. It is a direct-fit replacement for OEM Rexroth installations and is widely used as a safety and pressure-limiting valve in plastic injection molding machines, metallurgical presses, machine tools, and general industrial power units.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pilot Operated Pressure Relief Valve (Pressure Control Valve) |
| Model Designation | DB20-2-5X/315 |
| Material / Order Number | R900593530 |
| Series | 5X (Component Series 50 to 59) |
| Operating Pressure | Pressure setting 315 bar (nominal); standard industrial grade |
| Adjustment Type | Adjustable spring-loaded pilot stage with pressure setting lock |
| Mounting & Connection | Standard ISO / Manufacturer Interface (subplate mounting, port pattern per DB20 series) |
| Hydraulic Fluid | Mineral oil based hydraulic fluid per standard industrial specifications |
Engineering Features & Advantages
- Precision Performance: Two-stage pilot operated poppet design provides accurate, repeatable pressure limiting with low pressure override, minimal hysteresis, and stable regulation across the full flow range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with a robust housing and hardened internal seating surfaces that resist wear and contamination-related drift.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM Rexroth DB20 5X series valves, ensuring drop-in installation without modification to manifolds or piping.
- Adjustable Pressure Setting: Spring-loaded pilot stage allows precise setting of the relief pressure, with a locking mechanism to prevent unauthorized adjustment during operation.
- System Protection: Rapid response to pressure spikes limits peak system pressure, safeguarding pumps, valves, and actuators from overload damage.
Typical Industrial Applications
This pilot operated pressure relief valve is deployed as a primary pressure-limiting and safety device in demanding hydraulic systems
PRODUCT IMAGES
Rexroth DB20-2-5X/315 / R900593530 Pilot Operated Pressure Relief Valve
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Shop the genuine REXROTH DB20-2-5X/315 / R900593530 Pressure Relief Valve. This Germany-made 315 bar hydraulic component features a direct-operated poppet design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.