Product Overview
The Danfoss ER R 100B RP 20 20 NN N 3 S2BP A1N NNN NNN NNN / 8305 is a high-performance axial piston pump engineered for demanding industrial hydraulic systems. Built on Danfoss’s proven swashplate design, this bent-axis axial piston pump delivers exceptional volumetric efficiency and high-pressure capability in a compact, robust package. With a displacement of 100 cm³/rev and a tandem configuration (RP 20 20), it provides dual-circuit hydraulic power from a single drive shaft, making it ideal for mobile and industrial applications where space and weight are critical. The pump’s precision-machined cylinder barrel, pistons, and valve plate ensure smooth, low-pulsation flow across a wide speed and pressure range, while its through-drive capability allows flexible system integration.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Piston Pump (Axial Piston, Swashplate Design) |
| Model Designation | ER R 100B RP 20 20 NN N 3 S2BP A1N NNN NNN NNN / 8305 |
| Displacement | 100 cm³/rev (main pump); 20 cm³/rev (tandem rear pump) |
| Configuration | Tandem pump (RP 20 20) with through-drive |
| Operating Pressure | Up to 350 bar continuous; 400 bar peak (standard industrial grade) |
| Speed Range | Up to 2,500 rpm (dependent on circuit and fluid viscosity) |
| Mounting & Connection | Standard ISO / SAE flange; splined or keyed shaft options |
| Control Type | Pressure compensator / load sensing (S2BP control) |
| Port Connections | SAE split-flange or threaded ports per model code |
Engineering Features & Advantages
- Precision Performance: Swashplate axial piston design with high-precision cylinder barrel and pistons ensures excellent volumetric efficiency, low internal leakage, and stable flow even at high pressure and varying speeds.
- Tandem Configuration: Dual-pump arrangement (100 cm³ + 20 cm³) provides two independent hydraulic circuits from a single drive, reducing installation space and cost in complex systems.
- Advanced Control (S2BP): Integrated pressure and load-sensing control enables precise power management, reducing energy consumption and heat generation in variable-demand applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust bearings and hardened components for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original DANFOSS standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
With a displacement of 100 cm³/rev and a tandem configuration (RP 20 20), it provides dual-circuit hydraulic power from a single drive shaft, making it ideal for mobile and industrial applications where space and weight are critical.
PRODUCT IMAGES


DANFOSS ER R 100B RP 20 20 NN N 3 S2BP A1N NNN NNN NNN / 8305 Axial Piston Pump
⚡ 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 DANFOSS ER R 100B RP 20 20 NN N 3 S2BP A1N NNN NNN NNN / 8305 Proportional Directional Control Valve. This Denmark-made hydraulic component features precise flow control, delivering leak-free, reliable fluid control for heavy-duty industrial systems.