A10VSO18DFR/31R-PPA12K01 Rexroth Piston Pump 18cc 280bar

Product Overview

The A10VSO18DFR/31R-PPA12K01, A10VSO18DR/31R-PKC62K01, and A10VSO18DFR/31R-PPA12N00 are Bosch Rexroth A10VSO Series 31 swashplate-type axial piston variable displacement pumps with a nominal displacement of 18 cm³/rev. Designed for hydrostatic drives in open circuits, these pumps feature a nominal pressure of 280 bar (4000 psi) and peak pressure of 350 bar (5100 psi). Output flow is proportional to drive speed and displacement, with stepless flow variation achieved by adjusting the swashplate angle.

The A10VSO Series 31 features ISO or SAE mounting flange, SAE flanged connections, 2 case drain ports, excellent suction characteristics, low noise level, long service life, and favorable power-to-weight ratio. The series is suitable for mobile and industrial applications, supporting through-drive configurations for tandem pump installation in multi-circuit systems.

A10VSO18DFR/31R-PPA12K01 is equipped with DFR pressure and flow controller (load sensing), integrating pressure compensation and load sensing functions. The DFR control dynamically adjusts pump displacement by sensing actuator load pressure, precisely matching output flow to actual system demand. This model features ISO 2-hole mounting flange, A12 port configuration, and K01 through-drive specification (SAE A flange, 19-4 splined shaft, 3/4″).

A10VSO18DR/31R-PKC62K01 is equipped with DR pressure controller (constant pressure variable), 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. This model features SAE 2-hole mounting flange, C62 port configuration, and K01 through-drive specification.

A10VSO18DFR/31R-PPA12N00 is similarly equipped with DFR pressure and flow controller (load sensing), featuring ISO 2-hole mounting flange, A12 port configuration, and N00 indicating no through-drive.

All three models feature mounting flanges, shaft specifications, and port layouts conforming to Rexroth A10VSO Series 31 standards, enabling drop-in interchangeability with other A10VSO18 models. Every pump 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.

Technical Specifications

A10VSO18DFR/31R-PPA12K01 Specifications:

• Model: A10VSO18DFR/31R-PPA12K01

• Material Number (MNR): R902536916 / R902406017

• Brand: Bosch Rexroth

• Series: A10VSO Series 31

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

• Nominal Displacement: 18 cm³/rev (1.10 in³/rev)

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

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

• Maximum Speed: 3300 rpm

• Minimum Speed: 600 rpm

• Maximum Flow at 3300 rpm: Approx. 59.4 L/min

• Output Flow at 1500 rpm: Approx. 27 L/min

• Maximum Power at 280 bar: Approx. 27.7 kW

• Maximum Torque (Vg max): 80.1 N·m

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

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

• Mounting Flange: ISO 2-hole flange

• Shaft Type: Parallel keyed shaft (DIN 6885)

• Inlet Port: SAE J518C 1 inch

• Outlet Port: SAE J518C 3/4 inch

• Case Drain Ports: 2

• Through-Drive Capability: Yes, K01 (SAE A flange, 19-4 splined shaft, 3/4″)

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Weight: Approx. 12 kg (without through drive)

• 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: -25 to +90 ℃

A10VSO18DR/31R-PKC62K01 Specifications:

• Model: A10VSO18DR/31R-PKC62K01

• Material Number (MNR): R910983980

• Brand: Bosch Rexroth

• Series: A10VSO Series 31

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

• Nominal Displacement: 18 cm³/rev (1.10 in³/rev)

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

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

• Maximum Speed: 3300 rpm

• Minimum Speed: 600 rpm

• Maximum Flow at 3300 rpm: Approx. 59.4 L/min

• Output Flow at 1500 rpm: Approx. 27 L/min

• Maximum Power at 280 bar: Approx. 27.7 kW

• Maximum Torque (Vg max): 80.1 N·m

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

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

• Mounting Flange: SAE 2-hole flange

• Shaft Type: SAE splined shaft (19-4, 3/4″)

• Inlet Port: SAE J518C 1 inch

• Outlet Port: SAE J518C 3/4 inch

• Case Drain Ports: 2

• Through-Drive Capability: Yes, K01 (SAE A flange, 19-4 splined shaft, 3/4″)

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Weight: Approx. 12 kg (without through drive)

• 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: -25 to +90 ℃

A10VSO18DFR/31R-PPA12N00 Specifications:

• Model: A10VSO18DFR/31R-PPA12N00

• Material Number (MNR): R910940520

• Brand: Bosch Rexroth

• Series: A10VSO Series 31

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

• Nominal Displacement: 18 cm³/rev (1.10 in³/rev)

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

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

• Maximum Speed: 3300 rpm

• Minimum Speed: 600 rpm

• Maximum Flow at 3300 rpm: Approx. 59.4 L/min

• Output Flow at 1500 rpm: Approx. 27 L/min

• Maximum Power at 280 bar: Approx. 27.7 kW

• Maximum Torque (Vg max): 80.1 N·m

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

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

• Mounting Flange: ISO 2-hole flange

• Shaft Type: Parallel keyed shaft (DIN 6885)

• Inlet Port: SAE J518C 1 inch

• Outlet Port: SAE J518C 3/4 inch

• Case Drain Ports: 2

• Through-Drive Capability: No (N00 code)

• Seals: NBR (Nitrile)

• Housing Material: Cast iron

• Weight: Approx. 12 kg

• 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: -25 to +90 ℃

A10VSO Series 31 Same-Family Displacement Reference:

• A10VSO18: 18 cm³/rev, 280 bar rated, 350 bar peak, max 3300 rpm, weight approx. 12 kg

• A10VSO28: 28 cm³/rev, 280 bar rated, 350 bar peak, max 3000 rpm, weight approx. 15 kg

• A10VSO45: 45 cm³/rev, 280 bar rated, 350 bar peak, max 2600 rpm, weight approx. 21 kg

• A10VSO71: 71 cm³/rev, 280 bar rated, 350 bar peak, max 2200 rpm, weight approx. 33 kg

• A10VSO100: 100 cm³/rev, 280 bar rated, 350 bar peak, max 2000 rpm, weight approx. 45 kg

• A10VSO140: 140 cm³/rev, 280 bar rated, 350 bar peak, max 1800 rpm, weight approx. 60 kg

Data based on Rexroth A10VSO Series 31 official technical specifications.

Key Technical Advantages

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

The A10VSO18DFR/31R-PPA12K01 and A10VSO18DFR/31R-PPA12N00 are equipped with DFR pressure and flow controller, integrating pressure compensation (DR) and load sensing (FR) functions. 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 DFR control senses 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. 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 and machine tools requiring precise on-demand flow supply.

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

The A10VSO18DR/31R-PKC62K01 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 hydraulic fixtures and presses. This control method offers simple construction and high reliability, virtually eliminating relief losses during holding conditions.

3. 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, ensuring adequate suction at high speeds to prevent cavitation damage. The drive shaft can withstand axial and radial loading, with the cradle bearing hydrostatically unloaded to effectively distribute loads and reduce 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 A10VSO18 delivers maximum flow of approximately 59.4 L/min at 3300 rpm and maximum power of approximately 27.7 kW at 280 bar, weighing only approximately 12 kg, with power-to-weight ratio leading among comparable products. The swashplate axial piston design with optimized rotary group achieves efficient power transmission within a compact structure. The A10VSO18DFR/31R-PPA12K01 and A10VSO18DR/31R-PKC62K01 support through-drive capability (K01 specification), enabling tandem installation of gear pumps or axial piston pumps up to the same size on the rear of the main pump for compact system configurations driven by a single prime mover.

5. Exceptional Field Interchangeability and Media Compatibility

All three models feature mounting flanges (ISO 2-hole or SAE 2-hole), shaft specifications, and port layouts conforming to Rexroth A10VSO Series 31 standards, enabling drop-in interchangeability with other A10VSO18 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 A10VSO18 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 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 DFR control enabling on-demand flow and energy-saving holding

• 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

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

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

• Construction Machinery: Small excavator and loader auxiliary hydraulic systems

• Agricultural Machinery: Tractor hydraulic hitch and auxiliary hydraulic circuits

The A10VSO18DFR/31R-PPA12K01 and A10VSO18DFR/31R-PPA12N00 are ideally suited for small-to-medium power industrial hydraulic systems requiring 280 bar continuous working pressure, 18 cm³/rev displacement, and DFR load sensing control — the classic configuration for injection molding machine and machine tool hydraulic power units. The A10VSO18DR/31R-PKC62K01 is ideally suited for small-to-medium power industrial hydraulic systems requiring 280 bar continuous working pressure, 18 cm³/rev displacement, and DR constant pressure control — the classic configuration for hydraulic fixture and press holding circuits.

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 A10VSO18 series pumps weigh approximately 12 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 and flow controller on the A10VSO18DFR models by separately setting the load sensing differential and pressure compensation set point. The load sensing differential is factory set at 14 bar (200 psi), 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.

4. DR Controller Commissioning

Commission the DR pressure controller on the A10VSO18DR/31R-PKC62K01 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.

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. Recommended oil viscosity range is 15–100 cSt with operating temperature range of -25 to +90 ℃