Double Acting Hydraulic Power Unit: The Ultimate Guide
Whether at the construction site, on the rescue vehicle platform, or in the logistics warehouse, if you need your equipment to perform the two-way actions ofpushing and pulling or ascending and descending, then the double acting hydraulic power unit is the solution tailor-made for you. This article will take you to a deeper understanding of the double acting hydraulic power unit.
What is a Double Acting Hydraulic Power Unit?
The double acting hydraulic power unit is a type of hydraulic system device. Hydraulic oil can be alternately pressurized on both sides of the piston in the double acting hydraulic cylinder, thereby achieving reciprocating linear motion.
Typical Components of a Double Acting Hydraulic Power Unit
Motor
We offer a wide range of motor selection options, covering the mainstream voltage standards worldwide, and can flexibly match different scenarios. The AC models include 110V, 220V, 240V, 380V, and 415V, while the DC models offer 12V and 24V options.
Among them, the DC 12V and 24V motors are more suitable for mobile devices or scenarios without a fixed power supply, and can operate stably without relying on mains electricity. The AC 380V and 415V motors focus on industrial production lines, heavy machinery, and other high-power demand scenarios, with stronger power output. Some models of motors adopt the S3 working mode, which can achieve equipment protection while achieving efficient power output, and extend the service life of the equipment.
These motors drive high-voltage gear pumps to precisely convert mechanical energy into hydraulic energy, with power ranging from 1.5KW to 3KW and even a wider range. They provide continuous and stable power support for the entire hydraulic system, and are the core foundation for ensuring the efficient and reliable operation of the device.
Solenoid Directional Valve
It drives the valve core to move through electromagnetic force, thereby achieving the alternate supply of hydraulic oil to both sides of the hydraulic cylinder. Its precise reversing capability directly determines the smoothness and reliability of the executed actions. It is widely applicable to equipment such as automated production lines and construction machinery that have high requirements for action accuracy.
Integrated Assembly Components
Our device adopts an integrated design. The core assembly is composed of a high-pressure gear pump, a multi-functional manifold, various valves and an oil tank.
- The high-pressure gear pump is responsible for converting the motor power into hydraulic energy, directly determining the speed of the execution action.
- The multi-functional manifold serves as the central hub for hydraulic oil distribution, integrating multiple control functions through internal channels. It reduces external pipeline connections and lowers the risk of leakage.
- We offer a variety of oil cylinder options ranging from 3L to 100L in different capacities. This enables us to meet the needs of your various flow systems. In terms of material, there are two options available: strong steel and corrosion-resistant engineering plastic. The fuel tank design supports both horizontal and vertical installation methods, providing the equipment with greater flexibility in terms of space integration.
Hydraulic Lock and Speed Control Valve (Optional Accessory)
To meet your personalized needs, our system supports convenient functional expansion.
- You can optionally equip hydraulic locks based on operating conditions. These locks effectively prevent unstable displacement of hydraulic cylinders caused by load changes or sudden events. They are particularly suitable for scenarios such as vertical lifting and heavy-load positioning, providing dual safeguards for equipment and personnel safety.
- The speed control valve employs a coordinated mechanism of throttle regulation and pressure compensation to maintain stable flow during load fluctuations, enabling precise regulation of actuator movement speed. Offering higher control accuracy than standard throttle valves, it is suitable for scenarios demanding strict speed stability, such as precision machine tools and automated assembly lines.
Types of Double Acting Hydraulic Power Unit
DC Type
The core advantage of DC double acting hydraulic power units lies in their exceptional mobility and environmental adaptability. Utilizing 12V or 24V DC motors, they draw power directly from vehicle batteries, portable power sources, or small generators, eliminating dependence on fixed mains electricity. This feature makes them ideal for areas without mains power or scenarios requiring frequent relocation.
To further enhance operational convenience and safety, we offer optional wireless remote controllers. Operators can remotely and flexibly control hydraulic directional changes, enabling precise regulation of lifting, lowering, pushing, and pulling actions.
It is particularly well-suited for mobile cranes, emergency rescue tools, scissor lifts, and similar equipment. Certain models also feature a low-power consumption design, with endurance suitable for extended continuous operation.
AC Type
The AC double acting hydraulic power unit is driven by single-phase or three-phase AC motors. It delivers stable power output and smooth lifting cycles. Without requiring an external spring-assisted reset, it relies entirely on bidirectional hydraulic oil drive to achieve the reciprocating motion of the actuator.
Models utilizing three-phase AC motors deliver higher power ratings, making them suitable for continuous operation and heavy-duty equipment. This unit can be deployed in various balers, hydraulic presses, injection molding machines, and large-scale industrial production lines, providing reliable and efficient core power for these systems.
Advantages of a Double Acting Hydraulic Power Unit
High Efficiency and Precision
The core advantage of the double acting hydraulic power unit lies in its bidirectional controllable power output. It is actively driven by hydraulic oil during both the extension and retraction strokes of the hydraulic cylinder. This enables the equipment to perform more complex, faster and more precise cyclic movements.
Whether it is frequent lifting and lowering, precise pushing and pulling, or the clamping operation that requires maintaining a specific position, it can ensure consistent repetitive movements and enhance the level of automation and work efficiency.
Operate Steadily
Since there is no spring component, the device achieves bidirectional movement through liquid pressure. The movement process is smoother and fluid. It avoids the failure risks caused by spring fatigue, failure or response delay. This ensures that the entire system has greater reliability and a longer service life when subjected to heavy loads and high-frequency usage.
Compact Structure
Our device is designed with a highly integrated approach, featuring light weight and a compact structure. This facilitates the installation and integration within the limited device space and enhances the layout flexibility of the entire system significantly. It is very suitable for modern production lines with strict space requirements.
The Application of the Double Acting Hydraulic Power Unit
Mobile and Rescue Equipment
The DC double acting hydraulic power unit can perfectly fit with vehicle batteries or mobile power stations. This makes it an ideal power source for mobile cranes, hydraulic rescue tools and scissor lifts. It can provide stable and reliable two-way hydraulic power for these devices in situations such as remote areas without electricity, accident scenes, or narrow spaces in cities. It can perform precise lifting, pushing, pulling and demolition tasks.
Industrial Manufacturing
The double acting hydraulic power unit is suitable for driving various metal baling machines, scrap steel shearing machines and plastic injection molding machines. The device provides a strong and controllable bidirectional force, which can complete the compression and shaping of materials, as well as the closing and ejection actions of the mold. Its stable cyclic characteristics ensure the continuity and high efficiency of the production process, meeting the stringent requirements for power stability of industrial production lines.
Logistics and Warehousing
The logistics and warehousing sector has frequent and flexible demands.
The DC double acting hydraulic power unit is highly flexible and is suitable for various equipment such as forklifts and hydraulic stackers. It can achieve the functions of lifting and lowering the forks and pushing and pulling the pallets in scenarios such as warehouses and logistics parks. It can operate without a fixed power supply, enhancing the adaptability of the site.
The AC type is more commonly used in fixed equipment such as the pushing mechanisms and lifting platforms of logistics sorting lines. It achieves precise material transportation and stacking through smooth bidirectional movement. Its low failure rate and high durability features meet the continuous operation requirements of the logistics industry, reducing downtime and maintenance time.
Agriculture
The high degree of automation of modern agricultural machinery cannot be achieved without stable and reliable hydraulic power support. The double acting hydraulic power unit can be widely integrated into various agricultural equipment, such as the lifting system of tractors, the harvesting platform control mechanism of combine harvesters, and the clamping and cutting units of forestry logging machines.
With its precise two-way control capability, it efficiently realizes key actions such as the lifting and lowering of agricultural tools, adjustment of operation angles, and opening and closing of actuators. This not only significantly improves the accuracy and overall efficiency of agricultural operations but also effectively reduces the labor burden on operators and provides a strong guarantee for the large-scale and automated production in modern agriculture.
Why Choose the Target Double Acting Hydraulic Power Unit?
Precise Design
Target ensures product performance from the very beginning. We will optimize the bidirectional power output through computer simulation technology, combined with flow analysis and pressure balance verification. This ensures that the bidirectional performance of the device is completely consistent.
During the product development stage, we will conduct 3D modeling to present the structural details and assembly logic to you in an intuitive manner. Before production, we will submit all the technical documents for your approval, which will ensure that the product precisely matches the actual requirements.
At the same time, each device will undergo strict electrical safety inspections to identify and eliminate potential circuit hazards. The full-process standardized operation from design to production ensures greater product adaptability and safety.
High-Precision Manufacturing Process
Target prioritizes machining precision and material quality for core components. Hydraulic elements feature ultra-smooth surface finishes. Critical parts like manifolds and valves are crafted from high strength steel or aluminum alloy through CNC machining and precision drilling.
High precision manufacturing ensures tighter component fits and superior sealing performance. This significantly reduces hydraulic fluid leakage risks while minimizing operational wear.
The combination of premium materials and meticulous craftsmanship significantly enhances the product’s wear resistance and service life. Even during prolonged continuous operation or under harsh conditions, it maintains stable performance while reducing maintenance frequency and costs.
Comprehensive Testing
Target insists on conducting 100% full-process testing before delivery, covering aspects such as bidirectional cyclic operations, efficiency analysis, computer energy consumption assessment, and pressure balance verification.
Through precise pressure balance verification, it is ensured that the performance of the device is completely consistent in both directions, with no differences in pushing or pulling force or speed. Energy consumption analysis enables the product to improve power output while achieving efficient energy utilization and reducing long-term usage costs.
Our multi-dimensional tests not only verified the stable operation capability of the product under complex conditions such as high frequency and heavy load, but also ensured that every piece of equipment leaving the factory has reliable performance.
Final Thoughts
With over 10 years of experience in the hydraulic power system industry, Target focuses on professionalism and reliability, providing you with comprehensive service support. Choose Target, and you will not only get a high-performance double-acting hydraulic power unit, but also a mature and reliable system service. Contact us immediately and embark on your hydraulic upgrade journey.
Usually, it is possible. However, the prerequisite is that the pump, fuel tank, valve group, pipeline dimensions, flow rate, and pressure of the power unit must all meet the requirements for simultaneously driving multiple cylinders.
If the load fluctuates significantly or if precise synchronization of multiple cylinders is required, we recommend that you install a flow divider valve or an independent circuit to prevent uneven flow distribution and asynchronous operation.
The core cause of this sound is air being drawn into the oil pump, typically due to insufficient oil in the tank or restricted flow in the return oil line. You can follow these steps to troubleshoot and resolve the issue:
Check if the oil tank level meets the standard mark. If low, promptly refill to the specified range to prevent the pump inlet from being exposed above the oil surface.
Inspect the return oil line for kinks, blockages, or loose connections to ensure unobstructed oil flow.
Confirm sufficient air release space exists between the oil tank and pump inlet, allowing trapped air to escape before entering the pump with the oil.
Our double acting hydraulic power units are designed for standard operating conditions ranging from -10°C to 60°C. Core components feature temperature-resistant seals, meeting the demands of most industrial, logistics, and outdoor applications. For extreme environments, you can choose to customize a cold-resistant / high-temperature-resistant sealing kit to maintain stable performance.
Our default model does not have an explosion-proof function. If it is to be used in flammable and explosive environments, you can customize an explosion-proof version.
Our explosion-proof equipment is equipped with explosion-proof motors, flame-retardant hydraulic oil and anti-static fuel tanks. The key electrical components have undergone explosion-proof treatment while maintaining all the original performance advantages, which enables safe operation in hazardous environments.
When placing your order, please specify the exact explosion-proof grade requirements. Our engineers will select the appropriate components that comply with the relevant standards for you, and provide you with complete explosion-proof certification documents.