A10VSO20DFR1 Rexroth Hydraulic Pump 280Bar

Product Overview

The A10VSO20DFR1/31R-PPA12N00 is a heavy-duty swashplate axial variable displacement piston pump engineered on the proven Bosch Rexroth Series 31 framework. Designed specifically for open-circuit hydraulic systems, this unit provides 100% direct drop-in interchangeability with original Rexroth pumps. Every pump undergoes 100% full-load simulated factory testing before shipment, guaranteeing optimal volumetric efficiency, silent operation, and reliable field endurance under continuous high-pressure conditions.

Technical Specifications

• Full Model Code: A10VSO20DFR1/31R-PPA12N00

• Pump Design: Swashplate Axial Variable Piston Pump (Rexroth A10VSO Series 31 Platform)

• Displacement: 20 cm³/rev

• Nominal Pressure: 280 bar (4000 psi)

• Peak Pressure: 350 bar (5100 psi)

• Maximum Drive Speed: 3000 rpm

• Control System: DFR1 (Pressure and Flow Control / Load Sensing without bleed orifice)

• Rotation: Right-hand (R / Clockwise)

• Mounting Flange & Shaft: ISO 2-bolt mounting flange (P) with ISO parallel keyed shaft (P)

• Sealing Material: NBR (N / Nitrile Rubber)

• Unit Weight: Approx. 15 kg

Key Technical Advantages

• DFR1 Load Sensing Control: Features high-precision DFR1 control valves that automatically match pump output flow and pressure to load requirements, minimizing throttle losses and fluid heating.

• Advanced Tribological Metallurgy: Micro-finish ground pistons and bimetallic sintered bronze valve plates ensure minimal internal leakage and maintain volumetric efficiency above 92% at 280 bar.

• Low Pulsation & Quiet Operation: Optimized swashplate geometry and silent valve plate relief grooves suppress hydraulic pressure ripples, significantly lowering structure-borne noise.

• 100% Drop-In Interchangeability: Built strictly to Bosch Rexroth installation dimensions, enabling seamless replacement without pipe refitting or bracket modifications.

Application Areas

• Industrial Hydraulics: Injection molding machinery, metal balers, hydraulic presses, and machine tool hydraulic power units.

• Mobile Machinery: Auxiliary hydraulic systems for mini excavators, skid steer loaders, compaction equipment, and agricultural implements.

Expert Maintenance Tips

Flush the hydraulic system thoroughly and replace return line filters prior to installation. Maintain oil cleanliness at ISO 19/17/14 (NAS Class 8) or cleaner using ISO VG 46/68 anti-wear hydraulic oil. Always fill the pump housing completely with fresh hydraulic fluid through the top case drain port before initial start-up to avoid dry friction damage to bearings and valve surfaces.