A10VSO140DFR/31R-PPB12N00 Rexroth Piston Pump 140cc 280bar

Product Overview

The A10VSO140DFR/31R-PPB12N00 is a Bosch Rexroth A10VSO Series 31 swashplate-type axial piston variable displacement pump with a nominal displacement of 140 cm³/rev, nominal working pressure of 280 bar (28 MPa / 4000 psi), peak pressure capability of 350 bar (35 MPa / 5100 psi), right-hand rotation (clockwise, viewed from shaft end), SAE flange mounting, and weight of approximately 45–60 kg depending on configuration. Designed for hydrostatic drives in open circuits, the pump delivers output flow proportional to drive speed and displacement, with stepless variation via swashplate angle adjustment.

This model is equipped with a DFR pressure-flow combined controller, integrating pressure compensation (DR) and load sensing (FR) functions in a single controller. The load sensing function dynamically adjusts pump displacement by sensing actuator load pressure, precisely matching output flow to actual system demand and eliminating relief losses; pressure compensation automatically reduces displacement to only leakage flow when system pressure reaches the set point. The pressure control adjustment range is up to 280 bar, with standard setting at 280 bar; standby pressure is factory set at 14 bar, adjustable from 14 to 22 bar. The DFR control load sensing differential adjustment range is 14–22 bar, with pressure control overriding the flow control function.

The A10VSO Series 31 pumps feature the following core engineering characteristics: swashplate-type axial piston rotary group, open-circuit design; 2 case drain ports; excellent suction performance; low noise level; long service life; favorable power/weight ratio; versatile controller range; short control time; 100% through-drive capability for tandem installation of same-size gear pumps and axial piston pumps. The pump is suitable for operation with mineral oil and HF fire-resistant hydraulic fluids (HFD optional), representing the classic general-purpose medium-pressure hydraulic pump.

The A10VSO140DFR/31R-PPB12N00 features mounting flange, shaft specifications, and port layouts conforming to Rexroth A10VSO Series 31 standards, enabling drop-in interchangeability with other A10VSO140 models of the same specification. The A10VSO Series 31 covers a wide displacement range of 18–140 cm³/rev within a shared mounting flange system, offering DG, DR, DRG, DFR, DFR1, DFLR, ED, and ER control options for flexible selection in system design and equipment maintenance.

Every A10VSO140DFR/31R-PPB12N00 undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original Rexroth products without installation or plumbing modifications.

Technical Specifications

• Model: A10VSO140DFR/31R-PPB12N00

• Brand: Bosch Rexroth

• Series: A10VSO Series 31

• Pump Type: Open-circuit swashplate axial piston variable displacement pump

• Nominal Displacement: 140 cm³/rev (8.54 in³/rev)

• Nominal Working Pressure: 280 bar (28 MPa / 4000 psi)

• Peak Pressure: 350 bar (35 MPa / 5100 psi)

• Maximum Speed (standard version): 1800 rpm

• Rated Speed: 1500 rpm

• Minimum Speed: 600 rpm

• Control Type: DFR pressure-flow combined control

• Pressure Control Adjustment Range: Up to 280 bar (standard setting 280 bar)

• Standby Pressure Standard Setting: 14 bar

• Standby Pressure Adjustment Range: 14–22 bar

• DFR Pilot Flow Consumption: Max. approx. 3–4.5 L/min

• Direction of Rotation: R (clockwise, viewed from shaft end)

• Mounting Flange: SAE standard flange

• Shaft Type: SAE splined or keyed shaft (depending on configuration)

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Case Drain Ports: 2

• Through-Drive Capability: Yes, 100% torque transmission

• Inlet Absolute Pressure Range: 0.8–30 bar

• Case Drain Maximum Permissible Backpressure: ≤ 2 bar absolute

• Fluid Cleanliness Requirement: NAS Class 8 (ISO 18/16/13), system filter 10 μm

• Recommended Fluid: ISO VG32 / VG46 anti-wear hydraulic oil (L-HM)

• Operating Temperature Range: -20 to +80 ℃, optimal 40–55 ℃

• Fluid Compatibility: Mineral-based hydraulic oil, HF fire-resistant fluids (HFD optional)

A10VSO Series 31 Same-Family Displacement Reference (nominal conditions):

• A10VSO18: 18 cm³/rev, 280 bar nominal, 350 bar peak, max 3000 rpm, weight approx. 12 kg, shaft dia. 19.05 mm

• A10VSO28: 28 cm³/rev, 280 bar nominal, 350 bar peak, max 3000 rpm, weight approx. 15 kg, shaft dia. 22.2 mm

• A10VSO45: 45 cm³/rev, 280 bar nominal, 350 bar peak, max 2600 rpm, weight approx. 21 kg, shaft dia. 25 mm

• A10VSO71: 71 cm³/rev, 280 bar nominal, 350 bar peak, max 2200 rpm, weight approx. 33 kg, shaft dia. 32 mm

• A10VSO100: 100 cm³/rev, 280 bar nominal, 350 bar peak, max 2000 rpm, weight approx. 45 kg, shaft dia. 40 mm

• A10VSO140: 140 cm³/rev, 280 bar nominal, 350 bar peak, max 1800 rpm, weight approx. 60 kg, shaft dia. 44.45 mm

Data based on Rexroth A10VSO Series 31 official technical specifications and cross-verified same-family data.

Key Technical Advantages

1. DFR Pressure-Flow Combined Control — Precise Load Sensing and System Energy Savings

The A10VSO140DFR/31R-PPB12N00 features a DFR pressure-flow combined controller, integrating pressure compensation (DR) and load sensing (FR) functions in a single controller. The load sensing function dynamically adjusts pump displacement by sensing actuator load pressure, precisely matching output flow to actual system demand and eliminating relief losses; pressure compensation automatically reduces displacement to only leakage flow when system pressure reaches the set point. Pressure control overrides the flow control function, ensuring system pressure does not exceed the safety set point. This control method delivers significant energy savings under variable load conditions, reducing system oil temperature and extending fluid and component life — particularly suitable for injection molding machines, die-casting machines, machine tools, and other industrial hydraulic systems requiring precise on-demand flow supply and constant pressure holding.

2. Low Noise Operation and Excellent Suction Performance — Precision Engineering Control

The A10VSO Series 31 is renowned for low-noise operation, effectively suppressing pressure pulsation and fluid-borne noise through optimized valve plate flow passages, precision-machined rotary group, and rigid compact housing structure. The pump delivers excellent suction performance with an inlet absolute pressure range of 0.8–30 bar, combined with optimized suction flow passages ensuring adequate suction at maximum speed to prevent cavitation damage. The cradle bearing is hydrostatically unloaded, effectively distributing loads and reducing friction losses for improved operating efficiency and service life.

3. High Power Density and Compact Structure — 45–60 kg Class-Leading Power Density

The A10VSO140 achieves efficient power transmission within a compact structure at 140 cm³/rev displacement through swashplate axial piston design and optimized rotary group, with power-to-weight ratio leading among comparable products. The pump’s mounting dimensions conform to SAE standards, enabling direct replacement with same-specification A10VSO pumps without modifying the mounting interface. Short control time characteristics enable rapid response to system load changes, suitable for applications requiring frequent adjustment.

4. 100% Through-Drive and Flexible System Integration

The A10VSO140DFR/31R-PPB12N00 supports 100% through-drive capability, enabling tandem installation of same-size A10VSO axial piston pumps or gear pumps on the rear of the main pump for compact system configurations driven by a single prime mover. The dual case drain port design facilitates flexible drain line routing for different mounting orientations. This design provides exceptional integration flexibility in multi-circuit hydraulic systems, reducing the number of independent power units and lowering piping complexity and installation costs.

5. Exceptional Field Interchangeability and Media Compatibility

The A10VSO140DFR/31R-PPB12N00 features mounting flange, shaft specifications, and port layouts conforming to Rexroth A10VSO Series 31 standards, enabling drop-in interchangeability with other A10VSO140 models of the same specification. The pump is compatible with mineral-based hydraulic oil and HF fire-resistant fluids (HFD optional), with NBR seals suitable for standard industrial hydraulic systems. For equipment currently using A10VSO140 series pumps, direct replacement installation is possible without modifying system installation interfaces or plumbing layouts. The A10VSO Series 31 covers a wide displacement range of 18–140 cm³/rev, offering multiple control options for flexible selection in system design and equipment maintenance.

Application Areas

• Injection Molding Machines: Main pump for clamping, injection, and holding pressure circuits, with DFR control enabling on-demand flow and energy-efficient operation

• Die-Casting Machines: Main hydraulic pump for shot and intensification systems, with high pressure and large flow meeting fast shot demands

• Machine Tools and Tool Machines: CNC lathes, machining centers, and grinding machine clamping, feed, and tailstock drive hydraulic systems

• Hydraulic Presses: Four-column and frame-type hydraulic press power sources

• Metallurgical Equipment: Rolling mill, forging equipment, and continuous casting machine hydraulic power stations

• Mining Machinery: Mining excavator and LHD loader auxiliary hydraulic systems

• Cranes: Truck crane and loader crane hydraulic swing and hoist systems

• Marine Auxiliary Equipment: Deck machinery and steering gear hydraulic systems

• High-Power Hydraulic Transmission Systems: Widely deployed in machine tools, metallurgy, forging, mining, and cranes, particularly suitable for high-power hydraulic transmission applications

The A10VSO140DFR/31R-PPB12N00 is ideally suited for high-power industrial hydraulic systems requiring 280 bar continuous working pressure and displacements in the 140 cm³/rev range — the classic configuration for injection molding machine and press hydraulic power units.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. The A10VSO140DFR/31R-PPB12N00 weighs approximately 45–60 kg — use appropriate lifting equipment during installation and never strike the shaft end. Tighten mounting flange bolts in diagonal sequence to the specified torque. Couplings must be equipped with protective guards. Motor-to-pump shaft alignment should be checked after installation and again after 500 hours of operation.

2. Pre-Start Filling and Venting Procedure (Mandatory)

Before initial startup, the pump housing must be filled with clean hydraulic oil and maintained full during operation. Slowly fill through the case drain port with ISO VG32 or VG46 anti-wear hydraulic oil to ensure adequate lubrication, cooling, and sealing during startup. Operating an axial piston pump dry — even for a few seconds — will score the swashplate, valve plate, and piston slippers, causing immediate total pressure loss and irreversible damage. Start the pump in jog mode until the pump and piping are sufficiently filled and vented. After complete venting, run at low pressure for 5–10 minutes, then gradually increase to rated pressure. The case drain must be on top of the pump, with a separate line unrestricted to the reservoir extending below the oil level.

3. DFR Controller Commissioning

Commission the DFR pressure-flow combined controller by separately setting the flow valve (FR) standby differential and the pressure valve (DR) cut-off pressure. The pressure control adjustment range is up to 280 bar, with standard setting at 280 bar. Standby pressure is factory set at 14 bar, adjustable from 14 to 22 bar. The pressure compensation setting should be at least 10–15 bar below the system relief valve setting. During commissioning, first turn the pressure setting screw to the lowest pressure position, then gradually increase to the target pressure. When the pump is installed with the control device pointing downward, flushing flow must be provided through the flushing port toward the case drain port (a pump outlet restrictor is recommended). The DFR pilot flow consumption is max. approximately 3–4.5 L/min, which should be considered in system design.

4. Fluid Cleanliness and Filtration

The A10VSO140DFR/31R-PPB12N00 requires fluid cleanliness of NAS Class 8 (ISO 18/16/13). Use pressure line filters with 10 μm filtration accuracy. Avoid suction filters, which increase suction resistance and cavitation risk; if essential, use with a vacuum switch monitor. Install a breather filter with filtration accuracy ≤10 μm on the reservoir and regularly check oil level and fluid condition. Case drain backpressure must not exceed 2 bar absolute, with < 1 bar recommended. Hydraulic oil working temperature should not exceed 80 ℃, with optimal operating temperature of 40–55 ℃. When using HF fire-resistant fluids, verify seal material compatibility with the media.

5. Restart Procedure After Extended Shutdown

If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. Pumps stored for more than 3 months should have internal surfaces filled with hydraulic oil, ports sealed, and be stored vertically before restarting. After startup, operate at low pressure for 10–15 minutes until oil temperature reaches normal operating range before applying full load. When using HF fire-resistant fluids, shorten oil change intervals and increase fluid sampling frequency due to reduced lubricity.