A10VO45DR/31R-PPC11N00 Rexroth Piston Pump 45cc 280bar

Product Overview

The A10VO45DR/31R-PPC11N00 and A10VO28DFR/31L-PSC62K02 are representative models from the Bosch Rexroth A10VO Series 31 swashplate-type axial piston variable displacement pumps, corresponding to 45 cm³/rev and 28 cm³/rev displacement sizes respectively. The A10VO Series 31 is Rexroth’s classic pump platform for medium-pressure open-circuit applications, with a nominal pressure of 280 bar (4000 psi) and maximum pressure of 350 bar (5100 psi), suitable for a wide range of industrial and mobile hydraulic systems.

The A10VO45DR/31R-PPC11N00 is equipped with DR pressure controller, automatically adjusting the swashplate angle through an integrated pressure compensator. When system pressure reaches the set point, the pump automatically reduces displacement to only leakage flow, achieving constant pressure holding and overload protection. The pump features SAE 2-hole mounting flange and right-hand (clockwise) configuration, suitable for injection molding machines, hydraulic presses, and other industrial hydraulic systems requiring constant pressure holding.

The A10VO28DFR/31L-PSC62K02 is equipped with DFR pressure and flow controller, integrating pressure compensation and load sensing functions in a single controller. The load sensing function precisely matches pump output flow to actual system demand, eliminating relief losses; pressure compensation automatically reduces displacement when system pressure reaches the set point. The pump features left-hand (counter-clockwise) configuration, suitable for injection molding machines, machine tools, and other energy-efficient hydraulic systems requiring precise on-demand flow supply. The DFR control is the standard control type for the A10VO series, sensing system load requirements through a small hydraulic line connecting the pump and directional valve, automatically providing just enough fluid flow and pressure to meet the system’s immediate need.

The A10VO Series 31 features low-noise operation, excellent suction performance, long service life, and favorable power-to-weight ratio. The series supports through-drive capability, enabling tandem installation of gear pumps and axial piston pumps up to the same size, achieving 100% full torque transmission. The A10VO45DR/31R-PPC11N00 and A10VO28DFR/31L-PSC62K02 feature mounting flanges, shaft specifications, and port layouts conforming to Rexroth A10VO Series 31 standards, enabling drop-in interchangeability with other A10VO models of the same specification.

Every A10VO45DR/31R-PPC11N00 and A10VO28DFR/31L-PSC62K02 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

A10VO45DR/31R-PPC11N00 Specifications:

• Model: A10VO45DR/31R-PPC11N00

• Material Number (MNR): R902057508

• Brand: Bosch Rexroth

• Series: A10VO Series 31

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

• Nominal Displacement: 45 cm³/rev (2.75 in³/rev)

• Rated Working Pressure: 280 bar (28 MPa / 4060 psi)

• Peak Pressure: 350 bar (35 MPa / 5076 psi)

• Rated Speed (Vg max): 2600 rpm

• Maximum Speed: 3100 rpm

• Output Flow at 2600 rpm: Approx. 117 L/min

• Output Flow at 1500 rpm: Approx. 68 L/min

• Control Type: DR pressure controller (pressure cut-off)

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

• Mounting Flange: SAE 2-hole flange

• Shaft Type: Parallel keyed shaft (DIN 6885)

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Weight: Approx. 21 kg (without through drive)

• Case Drain Ports: 2

• Through-Drive Capability: No (N00 code)

• 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 ℃

A10VO28DFR/31L-PSC62K02 Specifications:

• Model: A10VO28DFR/31L-PSC62K02

• Material Number (MNR): R910908653

• Brand: Bosch Rexroth

• Series: A10VO Series 31

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

• Nominal Displacement: 28 cm³/rev (1.71 in³/rev)

• Rated Working Pressure: 280 bar (28 MPa / 4060 psi)

• Peak Pressure: 350 bar (35 MPa / 5076 psi)

• Rated Speed (Vg max): 3000 rpm

• Maximum Speed: 3600 rpm

• Output Flow at 3000 rpm: Approx. 84 L/min

• Output Flow at 1450 rpm: Approx. 40.6 L/min

• Control Type: DFR pressure and flow controller (load sensing + pressure compensation)

• Load Sensing Differential (Δp) Standard Setting: 14 bar (200 psi)

• Standby Pressure Standard Setting: 16 bar

• Direction of Rotation: L (counter-clockwise, viewed from shaft end)

• Mounting Flange: SAE 2-hole flange

• Shaft Type: Splined shaft

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Weight: Approx. 15 kg

• 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 ℃

A10VO Series 31 Same-Family Displacement Reference (nominal conditions):

• A10VO18: 18 cm³/rev, 280 bar rated, 350 bar peak, max 3300 rpm, weight approx. 12 kg

• A10VO28: 28 cm³/rev, 280 bar rated, 350 bar peak, max 3600 rpm, weight approx. 15 kg

• A10VO45: 45 cm³/rev, 280 bar rated, 350 bar peak, max 3100 rpm, weight approx. 21 kg

• A10VO71: 71 cm³/rev, 280 bar rated, 350 bar peak, max 2600 rpm, weight approx. 33 kg

• A10VO100: 100 cm³/rev, 280 bar rated, 350 bar peak, max 2200 rpm, weight approx. 45 kg

• A10VO140: 140 cm³/rev, 280 bar rated, 350 bar peak, max 2000 rpm, weight approx. 60 kg

A10VO Series 31 Control Options:

• DG: Two-point direct control

• DR: Pressure controller (pressure cut-off)

• DRG: Remote pressure control

• DFR / DFR1 / DRSC: Pressure and flow controller (load sensing)

• DFLR: Pressure, flow and power control

• ED: Electro-hydraulic pressure control

• ER: Electro-hydraulic pressure control (with proportional valve)

Key Technical Advantages

1. DR Pressure Controller — Precise Constant Pressure Holding and Overload Protection

The A10VO45DR/31R-PPC11N00 is equipped with DR pressure controller, automatically adjusting the swashplate angle through an integrated pressure compensator. When pump outlet pressure reaches the set point, the pressure compensator activates, reducing pump displacement to only leakage flow for constant pressure holding and eliminating relief losses. When system pressure drops, the pump automatically restores displacement output. The DR controller pressure adjustment range is up to 280 bar with fast response, suitable for industrial hydraulic systems requiring extended constant pressure holding, such as injection molding machine holding circuits, hydraulic fixtures, and presses. This control method offers simple construction and high reliability, virtually eliminating relief losses during holding conditions for significant system heat and energy reduction.

2. DFR Pressure and Flow Controller — Precise Load Sensing and System Energy Savings

The A10VO28DFR/31L-PSC62K02 is equipped with DFR pressure and flow 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. The load sensing differential (Δp) is factory set at 14 bar, with standby pressure set at 16 bar. When system pressure reaches the pressure compensation set point, the pump automatically reduces displacement to only leakage flow. 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, machine tools, and other industrial hydraulic systems requiring precise on-demand flow supply.

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

The A10VO 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 high speeds to prevent cavitation damage. The cradle bearing is hydrostatically unloaded, effectively distributing loads and reducing friction losses for improved operating efficiency and service life. The housing features 2 drain ports for flexible drain line routing to suit different mounting orientations.

4. High Power Density and Compact Structure — Flexible System Integration

The A10VO45 delivers approximately 117 L/min output flow at 2600 rpm rated speed and 280 bar, weighing approximately 21 kg, with power density leading among comparable products. The A10VO28 delivers approximately 84 L/min output flow at 3000 rpm rated speed, weighing only approximately 15 kg. The swashplate axial piston design with optimized rotary group achieves efficient power transmission within a compact structure. The A10VO28DFR/31L-PSC62K02 supports through-drive capability, enabling tandem installation of gear pumps and axial piston pumps up to the same size on the rear of the main pump for 100% full torque transmission, meeting the integration requirements of compound hydraulic systems. The series features SAE standard mounting flange and standard shaft dimensions, enabling direct replacement with same-specification A10VO pumps without modifying the mounting interface.

5. Exceptional Field Interchangeability and Media Compatibility

The A10VO45DR/31R-PPC11N00 and A10VO28DFR/31L-PSC62K02 feature mounting flanges (SAE 2-hole), shaft specifications, and port layouts conforming to Rexroth A10VO Series 31 standards, enabling drop-in interchangeability with other A10VO models of the same specification. The pump is compatible with mineral-based hydraulic oil and HF fire-resistant fluids, with NBR seals suitable for standard industrial hydraulic systems. For equipment currently using A10VO series pumps, direct replacement installation is possible without modifying system installation interfaces or plumbing layouts. The A10VO 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.

Application Areas

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

• Hydraulic Presses: Four-column and frame-type hydraulic press power sources, with DR pressure control enabling constant pressure holding

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

• Die-Casting Machines: Shot and intensification system auxiliary hydraulic circuits

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

• Construction Machinery: Excavator and loader auxiliary hydraulic systems

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

• Material Handling Equipment: Medium forklift and hydraulic lift platform power units

The A10VO45DR/31R-PPC11N00 is ideally suited for medium-high pressure industrial hydraulic systems requiring 280 bar continuous working pressure, 45 cm³/rev displacement, and DR pressure control — the classic configuration for injection molding machine holding circuits and hydraulic fixtures. The A10VO28DFR/31L-PSC62K02 is ideally suited for small-to-medium power industrial hydraulic systems requiring 280 bar continuous working pressure, 28 cm³/rev displacement, and DFR load sensing control — the classic configuration for injection molding machine and machine tool 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 A10VO45DR weighs approximately 21 kg and the A10VO28DFR weighs approximately 15 kg — use appropriate lifting equipment during installation and never strike the shaft end. Tighten SAE 2-hole 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. DR Pressure Controller Commissioning

Commission the DR pressure controller on the A10VO45DR/31R-PPC11N00 by verifying the pressure setting matches system requirements. The pressure adjustment range is up to 280 bar. During commissioning, first turn the pressure setting screw to the lowest pressure position, then gradually increase to the target pressure. Adjustment must be performed with the pump at full displacement and low operating pressure to avoid system pressure oscillation. In multi-pump systems, stagger the controller settings.

4. DFR Controller Commissioning

Commission the DFR pressure and flow controller on the A10VO28DFR/31L-PSC62K02 by separately setting the load sensing differential and pressure compensation set point. The load sensing differential (Δp) is factory set at 14 bar, with standby pressure set at 16 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. In multi-pump systems, stagger the controller settings to ensure proper power distribution.

5. Fluid Cleanliness and Filtration

Fluid cleanliness of NAS Class 8 (ISO 18/16/13) or better is recommended. 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.