1PV2V4 Rexroth Variable Vane Pump | 127.6 cm³

Product Overview

The Rexroth 1PV2V4 Series is a variable-displacement vane pump platform designed for industrial hydraulic systems requiring controlled flow delivery, pressure compensation and reliable continuous operation.

The requested configuration is:

1PV2V4-30/125PA07MS0-16

For the Size 125 1PV2V4 configuration, Rexroth technical documentation specifies an effective displacement of 127.6 cm³/rev, a nominal pressure of 160 bar, and a speed range of 900 to 1800 rpm. The catalog maximum flow is approximately 218 L/min at 1750 rpm and 10 bar.

The 1PV2V4 design incorporates several established Rexroth engineering features, including:

• Variable displacement operation
• Low operating noise
• Hydrodynamically lubricated plain bearings
• Bronze-coated control plates
• Low hysteresis
• Short control response time
• Standard test-point arrangement
• Multiple displacement and control configurations

These features make the series suitable for industrial hydraulic power units where controlled flow, stable pressure response and long service life are required.

For replacement applications, the complete ordering code must always be checked because shaft configuration, control arrangement, connections, seals and pressure settings can affect interchangeability.

Technical Specifications

Model and Construction

• Brand: Bosch Rexroth / Rexroth Hydronorma
• Series: 1PV2V4
• Model: 1PV2V4-30/125PA07MS0-16
• Pump Type: Variable Displacement Vane Pump
• Control Design: V4 variable vane pump
• Mounting: Flange mounting
• Standard Rotation: Clockwise when viewed from the shaft end
• Configuration: Exact special suffix PA07MS0 should be verified against the nameplate and original configuration documentation.

Hydraulic Data

• Size: 125
• Effective Displacement: 127.6 cm³/rev
• Nominal Pressure: 160 bar
• Maximum Outlet Pressure: 160 bar
• Adjustable Compensator Range: 40–160 bar
• Maximum Catalog Flow: 218 L/min
• Flow Reference Condition: 1750 rpm at 10 bar
• Speed Range: 900–1800 rpm
• Maximum Torque: 1330 Nm
• Drive Power at 1750 rpm: 64 kW

Fluid and Mechanical Data

• Reference Weight: 98 kg
• Weight Basis: Pump equipped with C1 pressure control
• Absolute Inlet Pressure: 0.8–2.5 bar
• Maximum Leakage Outlet Pressure: 2 bar
• Fluid Temperature: −10 to +70 °C
• Operating Viscosity: 16–160 mm²/s
• Minimum Recommended Viscosity at High Deadhead Pressure: 25 mm²/s
• Maximum Starting Viscosity When Delivering: 800 mm²/s
• Maximum Starting Viscosity When Deadheaded: 200 mm²/s
• Recommended Fluid: HLP mineral oil; HFD-R phosphate ester compatibility must follow the applicable Rexroth fluid specification.

Cleanliness

• Maximum Fluid Contamination: ISO 4406 Class 18/15
• Recommended Filter Performance: β20 ≥ 75
• Recommended Cleanliness for Longer Pump Life: ISO 4406 Class 17/14
• Recommended Filter Performance: β10 ≥ 100

Key Technical Advantages

1. Variable-Displacement Hydraulic Control

The 1PV2V4 uses a variable-displacement vane architecture, allowing pump output to be adjusted according to hydraulic demand.

This makes the pump particularly suitable for systems where flow requirements change during the machine cycle and where continuous maximum displacement would create unnecessary throttling losses.

2. Hydrodynamically Lubricated Plain Bearings

Rexroth specifies hydrodynamically lubricated sleeve/plain bearings for the 1PV2V4 design. Proper oil viscosity and fluid cleanliness allow the bearing system to maintain an effective lubricating film, reducing friction and wear during continuous operation.

This is especially important for the large 127.6 cm³/rev Size 125 configuration, where shaft and bearing loads are significant.

3. Bronze-Coated Control Plates

The 1PV2V4 incorporates bronze-coated control plates to provide favorable friction characteristics.

From an engineering standpoint, the condition of the control plate directly affects:

• Internal leakage
• Volumetric efficiency
• Pressure stability
• Start-up behavior

The surface treatment therefore plays an important role in maintaining controlled running clearances within the rotating group.

4. Low-Noise Hydraulic Operation

Rexroth identifies low noise level as one of the main features of the 1PV2V4 family.

The continuous vane pumping principle and internal geometry help produce smoother hydraulic delivery, making the series appropriate for:

• Machine tools
• Industrial production systems
• Hydraulic power units
• Factory automation equipment

5. Low Hysteresis and Short Control Response

The V4 control system is designed with low hysteresis and short control times.

Fast control response is valuable where the hydraulic system must react quickly to load changes while maintaining stable pressure and flow behavior.

6. Mature Modular Platform

The Rexroth 1PV2V4 family covers multiple sizes, including:

• Size 20
• Size 32
• Size 50
• Size 80
• Size 125

The Size 125 configuration provides 127.6 cm³/rev effective displacement.

This modular platform is advantageous for replacement and service applications, although complete interchangeability must always be verified using the full ordering code.

Application Areas

The Size 125 1PV2V4 is well suited to medium- and high-flow industrial hydraulic applications, including:

• Machine Tools
• Hydraulic Power Units
• Metal Forming Machinery
• Plastic Processing Machinery
• Hydraulic Presses
• Industrial Automation Systems
• Material Handling Equipment
• Steel Processing Machinery
• Hydraulic Test Systems
• Centralized Industrial Hydraulic Systems

The variable-displacement architecture is particularly useful when the machine requires different flow rates at different stages of its operating cycle.

Expert Maintenance Tips

Verify Rotation Before Installation

Rexroth’s standard 1PV2V4 documentation specifies clockwise rotation when viewed from the shaft end.

Before installation, verify the:

• Motor rotation
• Coupling orientation
• Pump shaft configuration
• Hydraulic circuit

against the actual pump nameplate.

Protect the Suction Side

For Size 125 pumps, suction conditions are critical.

The Rexroth technical documentation specifies an absolute inlet pressure range of 0.8–2.5 bar.

The suction circuit should therefore be checked for:

• Adequate pipe diameter
• Excessive line length
• Low reservoir level
• Filter restriction
• Excessive oil viscosity
• Air ingress

Maintain Hydraulic Cleanliness

The documented maximum contamination level is ISO 4406 Class 18/15, while Rexroth recommends Class 17/14 for longer service life.

Contamination control is especially important for vane-to-control-plate interfaces, bearings and other precision surfaces.

Keep Leakage Back Pressure Within Limits

The maximum leakage outlet pressure specified in the technical data is 2 bar.

Excessive housing pressure can place additional load on the shaft seal and may result in:

• Seal leakage
• Excessive temperature
• Reduced service life
• Internal mechanical damage

Maintain Correct Oil Viscosity

The specified operating viscosity range is 16–160 mm²/s, with an operating fluid temperature range of −10 to +70 °C.

Low viscosity at elevated oil temperature can increase internal leakage and reduce volumetric efficiency, so oil cooling and viscosity selection should be considered as part of the complete hydraulic-system design.