Single Acting Hydraulic Cylinder
An efficient and reliable industrial power core.
Ever-power is one of the professional hydraulic cylinder manufacturers, providing high-performance single-acting hydraulic cylinders suitable for multiple fields such as agriculture, industry, and construction machinery, and supporting customization, OEM and global delivery services.
What is a Single Acting Hydraulic Cylinder?
A Single Acting Hydraulic Cylinder is a hydraulic actuator that enables the piston to move unidirectionally through the pressure of hydraulic oil and achieves reset through spring force or external load. It is widely used in scenarios that require linear push but no reverse power, such as lifting platforms, clamping devices and some agricultural machinery.
Structurally speaking, the single acting cylinder design is usually simpler. Typically, there is only one oil port for oil intake. When the system is pressurized, the hydraulic oil enters the cylinder and pushes the piston to move in one direction. When the pressure is released, the piston returns to its original position by relying on the weight of the spring or the load itself. Due to its compact structure and simple operation, it is often used as an economical and efficient single acting hydraulic actuator.
According to the single acting hydraulic cylinder working principle, this type of hydraulic cylinder is particularly suitable for systems that start infrequently, are cost-sensitive or have limited space, featuring both high efficiency and convenient maintenance.
Types of Single-Acting Hydraulic Cylinders
Single Acting Telescopic Cylinder
Multi-stage piston rod design provides a long stroke and is compact when retracted.
Application: Dump trucks, garbage trucks, lifting equipment.
Single Acting Hydraulic Jack
Short stroke, high thrust, specially designed for lifting, safe and reliable.
Application: Automotive repair, bridge maintenance, industrial heavy-duty jacking.
Single Acting Plunger Cylinder / Hydraulic Ram
Plunger design, with large thrust and simple structure.
Application: Heavy machinery, agricultural equipment, presses.
Custom Hydraulic Cylinders
Customize the stroke, thrust and installation method according to customer requirements.
Application: Special industrial scenarios, OEM equipment.
Ever-power has been deeply engaged in the field of hydraulic technology for over 20 years and is a national high-tech enterprise integrating R&D, production and sales. The core production base is located in Qingshanhu Science and Technology City, covering an area of 68,000 square meters. Among them, 51,300 square meters is a modern intelligent manufacturing base, equipped with CNC machining centers, automated assembly lines and intelligent detection systems, achieving full-process digital control.
Relying on the industry-leading R&D team (with over 30% holding doctoral and master’s degrees) and the cooperation among industry, academia and research, we have mastered more than 50 national patents, led the drafting of 8 industry standards, and our products have passed international certifications such as ISO 9001, CE and API. They are widely used in fields such as construction machinery, mining machinery and new energy, and are exported to more than 30 countries around the world.
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Applications
Typical application scenarios of single-acting hydraulic cylinders
Dump trailer
Provide stable lifting power to ensure the safe and efficient unloading of goods.
Industrial machinery
Provides precise unidirectional power output in equipment such as stamping machines and injection molding machines.
Agricultural equipment
Compatible with lifting systems of tractors, harvesters, etc., to enhance operational efficiency.
Heavy lifting
The single-acting hydraulic jack is suitable for heavy load scenarios such as bridges and buildings.
Single-acting Cylinders Design and Specifications
| Parameter | Specification |
|---|---|
| Working Pressure | 10-35MPa (customizable) |
| Stroke Range | 50mm-5000mm (optional multi-level extension) |
| Sealing System | Imported sealing components (zero leakage guaranteed) |
| Design Features | – Built-in buffer device (reduces impact) – Optional displacement sensor (enables intelligent control) |
| Customization | Port type, installation method, anti-corrosion coating |
Single Acting Hydraulic Cylinder Working Principle
The working principle of the single-acting hydraulic cylinder is based on the core mechanism of converting hydraulic energy into mechanical motion. Its design is simple yet efficient, and it is widely used in scenarios that require unidirectional thrust. Hydraulic oil enters one side of the cylinder block (usually the bottom end of the piston) through a pump, generating high pressure to push the piston and piston rod out, and output linear thrust to complete tasks such as lifting, pushing, pulling or hoisting. The key point is that a single-acting hydraulic cylinder is driven only by hydraulic oil in the extension direction, while the reset (piston retraction) relies on external forces, such as an internal spring, the weight of the load, or external mechanical forces. This design is different from the double-acting hydraulic cylinder, which controls the extension and retraction directions through hydraulic oil.
Specifically, when the hydraulic pump injects oil into the cylinder block, the oil pressure acts on the piston, overcoming the load resistance and causing it to extend. After the action is completed, the hydraulic system releases pressure, and the piston returns to its initial position under the elastic force of the spring or the effect of gravity. For instance, in a dump truck, the single-acting telescopic hydraulic cylinder relies on hydraulic oil to lift the cargo compartment during unloading. After unloading, the gravity of the cargo compartment causes the piston to return to its original position. This unidirectional drive mechanism simplifies the hydraulic system, reduces costs and maintenance difficulty, but also limits its application in scenarios that require bidirectional precise control.
When comparing “single vs double acting hydraulic cylinders”, single-acting hydraulic cylinders are often preferred due to their simplicity and economy. Single-acting cylinders only use hydraulic oil to push the piston out, and reset by a spring or gravity. They have a simple structure, and their cost and maintenance expenses are much lower than those of double-acting cylinders. They are suitable for single-direction thrust scenarios such as dump trucks and jacks. Its compact design is also more suitable for environments with limited space. In contrast, the double-acting hydraulic cylinder, although it can hydraulically control the extension and retraction and is suitable for complex bidirectional movements, has a more complex system and a higher risk of failure. However, the reset of the single-acting cylinder relies on external force. If the external force is insufficient, the efficiency may be low. Therefore, if the task is simple and the budget is limited, a single-acting cylinder is a practical choice, but in complex scenarios, a double-acting cylinder is more flexible.
Why Choose Single Acting over Double Acting Cylinder?
Testimonials
The single acting hydraulic cylinder we purchased performs reliably in our dump trailers. Its compact design fits perfectly, and the spring return works smoothly. Delivery was prompt, and specs were accurate.
Our single acting hydraulic jacks are robust for heavy lifting in construction. They’re easy to maintain, and the stroke length suits our needs. Customer support was helpful with setup queries.
Customized Single-Acting Hydraulic Cylinder Solution
As an OEM supplier, we offer:
Customized design
Optimize parameters such as size, stroke and pressure according to customer requirements.
Materials and process
High-strength steel and wear-resistant coating are adopted to extend the service life.