3 kW Double-Acting Hydraulic Power Unit with Foot Pedal

Description

3 kW Double-Acting Hydraulic Power Unit with Foot Pedal

· 14 L/min first-stage flow · 2.8 L/min high-pressure flow · 30 L oil reservoir · 700 bar maximum pressure · 220V single-phase power supply

The CraftOil 3 kW double-acting hydraulic power unit with foot-pedal control is designed for demanding workshop and industrial applications where efficient hydraulic movement, repeatable operation and convenient operator control are important.

Powered by a 3 kW electric motor, this hydraulic power pack features a two-stage pump, a 30-litre oil reservoir and an electromagnetic directional valve operated by a foot pedal. Its double-acting hydraulic circuit supplies oil alternately to ports A and B, allowing compatible hydraulic cylinders to extend and retract under hydraulic pressure.

With a maximum operating pressure of 70 MPa (700 bar), a first-stage flow rate of 14 L/min and a high-pressure flow rate of 2.8 L/min, this model is suitable for compatible hydraulic equipment used in cable processing, metalworking, industrial maintenance and repetitive production operations.

The foot pedal allows the operator to activate the hydraulic system while keeping both hands available for positioning or supporting the workpiece.

CraftOil provides equipment selection assistance, service support in Ukraine and delivery arrangements for domestic and international customers.

Why choose the CraftOil 3 kW hydraulic power pack?

• Powerful 3 kW electric motor: designed for demanding hydraulic applications and repetitive work cycles.

• High first-stage flow rate: 14 L/min for faster cylinder movement when operating conditions allow.

• 2.8 L/min high-pressure flow: supports hydraulic movement under higher resistance.

• Double-acting hydraulic circuit: enables powered extension and retraction of compatible cylinders.

• Foot-pedal control: keeps the operator’s hands available for positioning the workpiece.

• 30 L oil reservoir: provides substantial oil capacity for compatible hydraulic systems.

• 700 bar maximum operating pressure: for equipment rated to work within this pressure limit.

• Two-stage hydraulic pump: combines higher flow at lower pressure with lower flow at high pressure.

• Glycerine-filled pressure gauge: helps reduce pointer vibration for easier pressure monitoring.

• 220V single-phase motor configuration: requires an electrical supply designed for the motor’s actual current and starting requirements.

This configuration is worth considering for production environments where hydraulic equipment operates repeatedly throughout a shift. Actual productivity depends on the cylinder, load, required pressure, cycle sequence and operating conditions.

How the 3 kW motor, double-acting circuit and foot pedal improve workflow

Each part of this hydraulic power unit addresses a different aspect of the work process.

The combined effect can be useful in repetitive production, but no single specification guarantees a particular cycle time. The final result depends on the connected equipment and the actual working sequence.

Foot-pedal control for repetitive industrial operations

The foot pedal operates the electromagnetic directional valve, allowing the operator to activate the hydraulic system without reaching for a manual control lever.

This is particularly useful when both hands are needed to hold a cable terminal, position a die or support a workpiece.

Key advantages

Hands remain available for positioning.
The operator can hold or align a component while controlling the hydraulic movement with a foot.

Fewer repeated hand movements.
The operator does not need to move between the work area and a manual lever for every cycle.

Convenient for repetitive production.
Foot control can improve workflow when the same hydraulic operation is performed many times during a shift.

Potentially more consistent positioning.
Keeping the workpiece supported during activation can help reduce unwanted movement.

Electromagnetic valve control.
The directional valve is activated electrically through the foot pedal rather than by manually moving a lever.

Important: train operators to work at the correct speed

The 3 kW configuration can deliver higher flow than smaller power units. Depending on the cylinder and load, the piston rod may move faster during the low-pressure stage.

Operators should become familiar with the movement speed before starting production. For precise positioning, use controlled pedal inputs where the equipment design permits, and follow the machine manufacturer’s operating instructions.

• Begin with supervised test cycles.

• Keep hands clear of pinch points and moving parts.

• Confirm that the workpiece and tooling are securely positioned.

• Make sure the pedal cannot be activated accidentally.

• Train new operators before allowing routine production work.

The purpose of this guidance is to help users operate the equipment confidently and safely, not to suggest that the foot pedal alone guarantees greater accuracy.

Double-acting hydraulic circuit: powered extension and retraction

The unit has two working hydraulic lines, designated A and B. The directional valve switches the oil supply between the two working chambers of a compatible hydraulic cylinder.

• Extension: oil is directed to the appropriate cylinder chamber to extend the piston rod.

• Retraction: the valve switches the oil supply to the other chamber, allowing the rod to retract under hydraulic pressure.

• Controlled movement in both directions: the cylinder does not have to rely solely on a return spring or gravity for its return stroke.

The actual direction of movement depends on the cylinder design and the hose connections.

How do you know whether you need a double-acting power unit?

A double-acting hydraulic power unit may be required when:

• The cylinder is designed with two hydraulic working ports.

• The piston rod must retract under hydraulic pressure.

• The connected machine requires powered movement in both directions.

• The application involves a controlled return stroke under load.

• The equipment manufacturer specifies a double-acting hydraulic circuit.

Check compatibility before connecting the hoses. Two ports can be a useful initial indication, but the cylinder documentation must confirm the port functions and required hydraulic circuit.

Technical specifications

The values above are based on the supplied product information. Confirm the precise configuration, electrical requirements and connections before purchase.

Two-stage pump: high flow and high pressure

The two-stage pump operates with different flow rates depending on the pressure required by the hydraulic system.

First stage: 14 L/min

At relatively low pressure, the pump provides a higher flow rate to move the cylinder more quickly when resistance is low.

Second stage: 2.8 L/min

As pressure increases, the pump switches to a lower flow rate to develop the force required for more demanding operations.

This design balances faster movement at lower pressure with the ability to perform high-pressure hydraulic work.

Example: filling a 0.5 L cylinder chamber

At a theoretical flow rate of 2.8 L/min, delivering 0.5 litres of oil would take approximately 11 seconds.

For comparison, a flow rate of 1.7 L/min would require approximately 18 seconds for the same theoretical volume.

These are simplified calculations, not guaranteed cycle times. Actual movement time depends on the operating pressure, pump behaviour, cylinder geometry, hose restrictions and other system characteristics.

30 L oil reservoir: capacity and thermal considerations

The 30-litre reservoir provides substantial oil capacity, but reservoir size must be matched to the complete hydraulic system and its duty cycle.

Two separate factors should be considered.

1. Required oil volume

The reservoir must contain enough usable oil to supply the cylinder throughout its working stroke while maintaining the oil level required by the manufacturer.

As a preliminary estimate, a reserve of 20–30% may be useful when assessing the relationship between reservoir capacity and system oil volume. This is not a universal sizing rule or a guaranteed cylinder-volume limit. For a double-acting cylinder, calculate the oil requirements for both chambers and account for the piston rod, stroke length and system layout.

2. Heat generated during operation

During repeated hydraulic cycles, some input energy is converted into heat. A 30 L reservoir should not automatically be assumed suitable for every continuous-duty application at a pump flow of 14 L/min.

For intensive or prolonged operation, assess the duty cycle, operating pressure, ambient temperature and cooling requirements. Monitor oil temperature and follow the manufacturer’s limits. Depending on the application, scheduled pauses or additional cooling may be necessary.

For continuous production: contact CraftOil with your cycle rate and cylinder specifications so the power unit can be assessed for your actual operating conditions.

220V electrical supply: installation requirements

The 3 kW motor requires more electrical capacity than a typical smaller hydraulic power unit.

At 220V, the motor may draw approximately 15–18 A under the assumptions supplied, with a higher current possible during startup. Actual current depends on the motor’s nameplate, efficiency, power factor and operating conditions.

For this reason, do not assume that every standard socket or extension lead is suitable.

Before installation:

• Check the motor nameplate and manufacturer’s electrical documentation.

• Have a qualified electrician assess the supply, cable size, circuit protection and starting current.

• Confirm whether a dedicated circuit is required for your installation.

• Avoid undersized extension leads and extension cables left coiled during operation.

• Ensure proper grounding and suitable protection.

• Keep the power cable and pedal cable away from walkways and moving machinery.

A 20–25 A circuit breaker and a cable cross-section of 2.5 mm² or larger may be mentioned as a preliminary installation reference, but these values are not universal installation instructions. The correct arrangement depends on cable length, installation method, local regulations, motor characteristics and protective-device requirements. Longer cable runs may require a larger cross-section.

If a suitable 220V supply is unavailable, discuss alternative power-unit configurations with CraftOil. A smaller motor or a three-phase model may be worth considering, provided it meets the hydraulic requirements of your equipment.

Pressure gauge: 1000 bar scale, 700 bar maximum

The supplied glycerine-filled pressure gauge has a scale up to 1000 bar. The maximum operating pressure of the power unit remains 700 bar.

The larger gauge scale does not increase the pressure rating of the pump or any connected component. All cylinders, hoses, couplings, fittings and machine components must be rated for the intended working pressure.

Glycerine filling helps damp pointer vibration, making the gauge easier to read in many operating environments.

Package contents

The standard package is specified to include:

• 3 kW double-acting hydraulic power unit

• Foot-pedal control assembly

• 2 m high-pressure hydraulic hose

• Quick-release hydraulic coupling

• Glycerine-filled pressure gauge, 0–1000 bar scale

• Pressure-gauge adapter

• Operating instructions

Hydraulic oil is not included. The reservoir capacity is 30 litres; the actual filling quantity and oil grade must be confirmed using the manufacturer’s instructions.

Confirm the supplied coupling type and compatibility with your equipment before ordering.

Applications for the 3 kW double-acting hydraulic power unit

The CraftOil hydraulic power pack may be suitable for compatible equipment requiring a double-acting circuit and operating pressure within the unit’s rated limit.

Potential applications include:

• Cable lug and terminal crimping equipment

• Hydraulic cable cutters

• Busbar bending machines

• Hydraulic presses, including cable-processing presses

• Double-acting hydraulic cylinders

• Pipe-bending equipment

• Hydraulic bearing and pulley pullers

• Industrial maintenance and repair equipment

• Other compatible high-pressure hydraulic machinery

Compatibility depends on the equipment’s pressure and flow requirements, cylinder displacement, oil volume, connections, duty cycle and electrical supply.

A 700 bar maximum pressure rating does not mean that every connected machine can safely operate at 700 bar. Always follow the lowest applicable pressure rating in the complete hydraulic system.

Who should consider this hydraulic power unit?

The 3 kW foot-pedal model is worth considering for:

• Cable manufacturers and cable-processing facilities

• Electrical installation companies performing repetitive crimping operations

• Industrial laboratories and production workshops

• Large maintenance and repair departments

• Manufacturing facilities with frequent hydraulic cycles

• Operators who need both hands available for workpiece positioning

For occasional operations, a smaller power unit may be sufficient. For intensive production, assess the required flow, pressure, oil temperature, reservoir capacity and electrical supply before selecting a model.

Compare CraftOil hydraulic power units

The following comparison is based on the supplied model information.

The two 3 kW configurations are listed with the same flow rates and reservoir capacity. The main stated difference is the control arrangement. Confirm the exact model designation and included accessories before ordering.

How to select the right model

Question 1: What type of cylinder do you have?
Check the cylinder documentation to determine whether it requires a single-acting or double-acting hydraulic circuit.

Question 2: Does the operator need both hands available?
If frequent repositioning is involved, a foot-pedal model may improve convenience. For occasional work, a manual-lever model may be sufficient.

Question 3: How frequently will the unit operate?
For repetitive production, a higher flow rate may reduce hydraulic movement time, but actual cycle time and thermal performance must be assessed under the intended load.

Question 4: What electrical supply is available?
The 3 kW, 220V configuration requires an appropriately designed electrical installation. Confirm this before ordering.

Compatibility with CraftOil hydraulic presses

CraftOil manufactures hydraulic presses in 50-tonne and 70-tonne configurations and has practical experience with hydraulic systems in its own workshop.

However, press tonnage alone is not enough to establish compatibility with a power unit. The cylinder’s pressure and flow requirements, displacement, stroke, return arrangement, hydraulic connections and duty cycle must also be checked.

Before purchasing, provide CraftOil with:

• Your press or equipment model

• Cylinder type and working ports

• Required operating pressure

• Cylinder stroke and displacement, if available

• Number of cycles per shift

• Available electrical supply

• Distance between the power unit and the machine

We can help assess whether this 3 kW foot-pedal power unit is suitable or whether a smaller or differently configured model would be a better choice.

Recommended hydraulic oil

Use an industrial hydraulic oil that meets the power unit manufacturer’s requirements.

The supplied product information identifies ISO VG 32 and ISO VG 46 hydraulic oils as possible options, including compatible HLP 32/HLP 46 products and equivalents. Products such as I-20A or MGE-46V should only be used if their specifications are confirmed as suitable for this power unit and its operating conditions.

Oil selection and maintenance

• Oil grade: follow the manufacturer’s manual and the expected operating temperature.

• Filling quantity: the reservoir capacity is 30 litres, but the actual filling quantity must follow the specified oil level and system requirements.

• Cleanliness: use clean filling equipment and suitable filtration. Contaminated oil can accelerate pump wear and interfere with directional-valve operation.

• Temperature: monitor oil temperature during intensive use and follow the manufacturer’s operating limits.

• Oil changes: follow the specified maintenance interval and inspect the oil regularly for contamination, abnormal darkening or a burnt smell.

• Mixing oils: do not mix different grades or products unless compatibility has been confirmed.

The required oil quantity should be based on the reservoir’s filling instructions and the complete hydraulic system, not solely on the cylinder’s nominal displacement.

Safety and operating guidelines

High-pressure hydraulic equipment must be installed and operated by trained personnel.

• Position the foot pedal to prevent accidental activation.

• Keep the pedal cable out of walkways and away from moving machinery.

• Train operators to recognise the cylinder’s movement speed before starting production.

• Inspect hoses, fittings and couplings before each operating session.

• Replace damaged hoses immediately if cracks, bulges, leaks or other defects are found.

• Verify that ports A and B are connected according to the cylinder and valve documentation.

• Never exceed the rated pressure of the power unit, cylinder, hoses, fittings or connected machine.

• Never disconnect a quick-release coupling while the system is pressurised.

• Wear suitable eye protection and follow the equipment’s safety instructions.

• Isolate the electrical supply and release hydraulic pressure before maintenance.

• Use appropriate lifting equipment or assistance when moving the 52 kg unit.

• Ensure proper grounding and a suitable electrical installation.

Remember: 700 bar is the maximum stated operating pressure of the power unit, not a guarantee that every connected component can withstand that pressure.

Warranty, spare parts and service

According to the supplied product information, CraftOil offers:

• Warranty: 3 months.

• Spare parts: availability in Ukraine for seals, pressure gauges, hoses, quick-release couplings, foot pedals and electromagnetic valve coils, subject to current stock.

• Technical assistance: consultation on connection and setup by phone, Viber or Telegram.

• Collection: from the CraftOil warehouse in Kharkiv.

• Domestic delivery: dispatch via Nova Poshta, subject to current arrangements.

For international orders, confirm delivery availability, shipping cost, dispatch time and warranty terms with CraftOil.

Why buy your hydraulic power unit from CraftOil?

Practical hydraulic experience.
CraftOil manufactures hydraulic presses and understands the importance of matching the power unit to the cylinder, required pressure and production cycle.

Support before purchase.
We help assess the hydraulic circuit, reservoir capacity, electrical supply and control requirements before you order.

Spare parts and service assistance.
We can advise on available components and troubleshooting for the foot-pedal and electromagnetic control system.

A model matched to your workload.
A 3 kW motor is not automatically the best choice for every application. If a smaller unit meets your requirements, we will help you consider that option.

Ordering and delivery support.
Subject to availability, dispatch can be arranged from Kharkiv. Payment options and delivery arrangements are confirmed at the time of ordering.

Order the CraftOil 3 kW hydraulic power unit

Looking for a 3 kW double-acting hydraulic power pack with foot-pedal control, a 30 L reservoir and 700 bar maximum pressure?

Contact CraftOil with your cylinder specifications, operating cycle and electrical supply details. We will help you assess hydraulic compatibility and choose the configuration that fits your production requirements.

CraftOil — hydraulic equipment selected for your real working conditions.

Frequently Asked Questions

1. What is the maximum pressure of this hydraulic power unit?

The maximum operating pressure is 70 MPa, equivalent to 700 bar. The pressure gauge has a scale up to 1000 bar, but the unit’s maximum operating pressure remains 700 bar.

2. What are the pump flow rates?

The stated first-stage flow rate is 14 L/min at lower pressure, and the second-stage flow rate is 2.8 L/min at high pressure. Actual flow and cycle time depend on operating conditions and the connected hydraulic equipment.

3. How is the 3 kW model different from the 1.5 kW version?

The supplied specifications list 14 / 2.8 L/min for the 3 kW model, compared with 7.9 / 1.7 L/min for the 1.5 kW models. The 3 kW version also has a 30 L reservoir, compared with 10 L on the listed 1.5 kW units. The higher flow rate may reduce hydraulic movement time, subject to the cylinder and load.

4. Why choose a foot-pedal hydraulic power unit?

The foot pedal allows the operator to activate the hydraulic system while keeping their hands available for positioning the workpiece. It can be useful in repetitive production operations.

5. Can I connect a single-acting cylinder?

This model is specified for a double-acting hydraulic circuit. A single-acting cylinder may require a different valve arrangement. Confirm compatibility with the equipment manufacturer or a qualified hydraulic technician before connecting it.

6. Is the 30 L reservoir suitable for continuous operation?

Reservoir capacity alone cannot determine continuous-duty suitability. Oil temperature depends on the duty cycle, operating pressure, ambient conditions and cooling arrangements. For intensive operation, assess the system requirements and monitor oil temperature.

7. Can I plug the 3 kW unit into a standard 220V socket?

Do not assume that a standard socket or extension lead is suitable. The motor’s running and starting current, circuit protection, cable size and installation must be assessed against the nameplate and local electrical requirements by a qualified electrician.

8. Which hydraulic oil should I use?

The supplied information lists ISO VG 32 and ISO VG 46 hydraulic oils as possible options. Follow the manufacturer’s manual to confirm the correct grade for your operating conditions.

9. Is hydraulic oil included?

No. Hydraulic oil is not included in the stated package. The reservoir capacity is 30 litres; use the manufacturer’s filling instructions to determine the required quantity.

10. What is included in the package?

The stated package includes the hydraulic power unit, foot-pedal control, 2 m high-pressure hose, quick-release coupling, glycerine-filled pressure gauge, gauge adapter and operating instructions.

11. What warranty does CraftOil provide?

The supplied product information specifies a three-month warranty. Confirm the current warranty terms with CraftOil before ordering.

12. Can CraftOil deliver this power unit to Europe?

International delivery can be discussed with CraftOil. Availability, shipping costs, delivery time and payment arrangements depend on the destination and current logistics options.