10 HP Closed-Loop Hydraulic Power Unit — Up to 40 LPM

The HydoPax CP28 is a compact and robust closed-loop hydraulic power unit designed to deliver up to 40 LPM of bidirectional hydraulic flow with precise electronic control.

Powered by a 10 HP / 7.5 kW three-phase electric motor and a Bosch Rexroth A4VG28 variable-displacement axial piston pump, the CP28 provides efficient and responsive hydraulic power for applications requiring bidirectional flow, variable speed, and precise hydraulic control.

The A4VG28 features a 28 cc/rev maximum displacement and proportional electric (EP) control, allowing pump displacement and flow direction to be continuously adjusted according to the control signal. At a motor speed of 1,450 RPM, the pump provides a theoretical maximum flow of approximately 40.6 LPM.

Its closed-loop architecture provides direct hydraulic power transmission between the pump and actuator, making the CP28 particularly suitable for applications requiring controlled hydraulic motion, reversible operation, and dynamic speed control.

The CP28 features a modular design that can be configured with different control interfaces, hydraulic tank capacities, filtration systems, instrumentation, cooling systems, and application-specific accessories.

Key Features

• Up to 40 LPM theoretical hydraulic flow

• 28 cc/rev variable-displacement axial piston pump

• Bosch Rexroth A4VG28

• Closed-loop hydraulic circuit

• Proportional electric (EP) control

• Bidirectional hydraulic flow

• 10 HP / 7.5 kW three-phase electric motor

• Recommended continuous working pressure: up to 1,000 PSI*

• Variable flow according to system demand

• Electronic forward, neutral, and reverse control

• Precise speed and flow control

• Integrated charge/boost circuit

• High-pressure circuit protection

• Hydraulic filtration

• Optional VFD for variable-speed motor operation

• Customizable hydraulic tank and circuit configuration

• Application-specific instrumentation and accessories

• Compact and space-efficient design

• Suitable for industrial, mobile, testing, simulation, and custom hydraulic applications

Technical Specifications

Product Series

HydoPax CP28

System Type

Closed-Loop Hydraulic Power Unit

Power Rating

10 HP / 7.5 kW

Flow Configuration

Variable / Bidirectional

Pump Type

Variable-Displacement Axial Piston Pump

Pump Model

Bosch Rexroth A4VG28

Maximum Pump Displacement

28 cc/rev

Maximum Motor Speed

1,450 RPM

Maximum Theoretical Flow

40.6 LPM

Typical Actual Flow

≈36–39 LPM

Control Type

Proportional Electric (EP)

Flow Direction

Bidirectional

Recommended Continuous Working Pressure

1,000 PSI*

Motor Type

Three-Phase Electric Motor

Motor Power

7.5 kW / 10 HP

Rated Frequency

50 Hz

Phase

3 Phase

Rated Speed

1,450 RPM

VFD

Optional

Charge / Boost Circuit

Integrated

Pressure Protection

High-Pressure Protection

Hydraulic Filter

Included

Circuit Protection

Included

Hydraulic Tank Capacity

Customizable

Dimensions

Application dependent

Weight

Application dependent

*Actual pressure capability depends on pump efficiency, motor loading, duty cycle, hydraulic temperature, and system configuration. Maximum pump pressure ratings and manufacturer's operating limits must always be observed.

Configuration Options

The HydoPax CP28 can be configured according to the requirements of your application, including:

• Proportional electric pump control

• Forward / neutral / reverse control

• External controller or PLC integration

• VFD-controlled motor speed

• Adjustable pressure control

• Charge-pressure configuration

• Custom hydraulic tank capacity

• Additional filtration and contamination-control systems

• Hydraulic cooling systems

• Pressure, temperature, and flow instrumentation

• Electronic monitoring and data acquisition

• Custom hydraulic ports and connections

• Application-specific hydraulic manifolds

• Electrical control panels and protection systems

• Custom frame, mounting, and enclosure configurations

• Application-specific accessories

Built for Controlled Hydraulic Motion

The HydoPax CP28 combines a 28 cc/rev Bosch Rexroth A4VG28 variable-displacement piston pump with a 10 HP electric motor to provide precise, electronically controlled bidirectional hydraulic power in a compact package.

With up to 40.6 LPM theoretical flow at 1,450 RPM, the CP28 provides a balanced combination of flow capacity, pressure capability, controllability, and motor power, making it an efficient platform for closed-loop hydraulic applications.

From pump control and hydraulic circuit configuration to instrumentation, filtration, cooling, and installation requirements, the CP28 can be configured to match the specific requirements of your hydraulic system.