China Hot selling Single Acting Large Tonnage Lock Nut Hydraulic Jack Cylinder with Low Price a/c vacuum pump

Product Description

Single Acting Large Tonnage Lock Nut Hydraulic jack Cylinder With Low Price


Description of self-locking type hydraulic jack:

  Self-locking type hydraulic jack is used for supporting heavy in the long term, it could support heavy without oil pressure, safe and reliable. It also could be used under water, single acting, return with loading, nut can be locking automatically, making loading more safe, especially in the large project, it is more easily to be operated and controlled, it has pressurizer, pres-relief valve is prevent to over load in the cylinder to protect jack. The connection of the device adopt high pressure and thread couple, it has the function of quick use, and it also could conquer the disadvantage of oil leak. The jack is mainly used for rising, topping, tear downing in electric power, building, machine manufacturing, mining, railway, bridge, shipbuilding and many industrial.

Features of self-locking type hydraulic jack:

1) Single acting hydraulic jack.
2) Nut could be locking automatically, making load more safe.
3) Specially-made composite material coating has stronger anti-corrosion, and less force of friction.
4) Overflow hole has the function of limiting stroke.
5) The top of piston rod is with a ringlike sphere spacer, it is allow about 8% of bias factor, keeping the pressure of the jack balanced, making jack more longevity.
6) Self-locking hydraulic jack can be customized into double acting hydraulic jack according to the requirement of customer, but closed height need to be increased.

Usage of self-locking type hydraulic jack:

1)If the oil capacity is not enough in the pump, it should pour working oil(10#) and then start to work.

2) Estimate tonnage, prohibit to overload.
3) Confirming the center of gravity of jack, finding the point of strength, meanwhile, it should consider the degree of hardness and softness of ground, whether it need to add a plank to prevent jack will be slant when lifting.
4) After jack lift the heavy, it should use some tough wood to support the heavy, prohibit to use jack as upholder to prevent unbalanced load, there has the dangerous of slant.
5) when working, firstly, it should connect quick coupling with jack, choose a suit placement, screw the bolt of oil pump, and then it could start to work, unscrew the bolt, the cylinder will be unloading.

Model Capacity
Effective area
of cylinder
Capacity of hydraulic oil
Closed height
Extend height
Outer diameter
CLL-55-50 55 50 71.3 356.5 164 214 125 16
CLL-55-100 100 713 214 314 21
CLL-55-150 150 1069.5 264 414 26
CLL-55-200 200 1426 314 514 31
CLL-55-250 250 1782.5 364 614 36
CLL-55-300 300 2139 414 714 41
CLL-100-50 100 50 133.3 666.5 187 237 165 31
CLL-100-100 100 1333 237 337 39
CLL-100-150 150 1999.5 287 437 48
CLL-100-200 200 2666 337 537 57
CLL-100-250 250 3332.5 387 637 65
CLL-100-300 300 3999 437 757 74
CLL-150-50 150 50 198 990 209 259 205 53
CLL-150-100 100 1980 259 359 66
CLL-150-150 150 2970 309 459 78
CLL-150-200 200 3960 359 559 92
CLL-150-250 250 4950 409 659 105
CLL-150-300 300 5940 459 759 118
CLL-200-50 200 50 266.5 1332.5 243 293 250 83
CLL-200-100 150 3997.5 343 493 118
CLL-200-150 250 6662.5 443 693 153
CLL-250-50 250 50 366.4 1832 249 299 275 116
CLL-250-150 150 5496 349 499 163
CLL-250-250 250 9160 449 699 210
CLL-300-50 300 50 457 2285 295 345 310 173
CLL-300-150 150 6855 395 545 233
CLL-300-250 250 11425 495 745 293
CLL-400-50 400 50 559 2795 335 385 350 251
CLL-400-150 150 8385 435 585 327
CLL-400-250 250 13975 535 785 403
CLL-500-50 500 50 730 3650 375 425 400 367
CLL-500-150 150 10950 475 625 467
CLL-500-250 250 18250 575 825 568
CLL-600-50 600 50 857 4285 395 445 430 447
CLL-600-150 150 12855 495 645 563
CLL-600-250 250 21425 595 845 680
CLL-800-50 800 50 1179 5895 455 505 505 711
CLL-800-150 150 5895 555 705 871
CLL-800-250 250 29475 655 905 1031
CLL-1000-50 1000 150 1465 7325 495 545 560 951
CLL-1000-150 50 21975 595 745 1143
CLL-1000-250 250 36625 695 945 1335

Application of self-locking type hydraulic jack:
Self-locking type hydraulic jack is mainly used for rising, topping, tear downing in electric power, building, machine manufacturing, mining, railway, bridge, shipbuilding and many industrial.


Type: Hydraulic Jack
Structure: Hydraulic Jack
Capacity (Load): 55-1000t
Power Source: Hydraulic
Max Height: 301-350mm
Certification: CE, ISO 9001:2000, SGS


hydraulic cylinder

How do hydraulic cylinders handle variations in temperature and harsh operating environments?

Hydraulic cylinders are designed to handle variations in temperature and harsh operating environments by incorporating specific features and materials that ensure their durability, reliability, and performance. The ability of hydraulic cylinders to withstand extreme temperatures, corrosive environments, and other harsh conditions is crucial for their successful operation in a wide range of applications. Here’s a detailed explanation of how hydraulic cylinders handle variations in temperature and harsh operating environments:

1. Temperature Range:

– Hydraulic cylinders are designed to operate within a specified temperature range. The materials used in their construction, such as cylinder barrels, pistons, seals, and lubricants, are selected to withstand the anticipated temperature variations. Specialized seals and O-rings made from materials like nitrile, Viton, or polyurethane are used to maintain their sealing properties over a wide temperature range. Heat-resistant coatings or thermal insulation may be applied to certain components to protect them from high temperatures.

2. Thermal Expansion:

– Hydraulic cylinders are designed to accommodate thermal expansion and contraction that occurs with temperature changes. The materials used in their construction have different coefficients of thermal expansion, allowing the cylinder components to expand or contract at a similar rate. This design consideration prevents excessive stress, binding, or leakage that could result from thermal expansion or contraction.

3. Heat Dissipation:

– In applications where hydraulic cylinders are subjected to high temperatures, heat dissipation mechanisms are employed to prevent overheating. Cooling fins or heat sinks may be incorporated into the cylinder design to increase the surface area for heat transfer. In some cases, external cooling methods such as air or liquid cooling systems can be used to maintain optimal operating temperatures.

4. Corrosion Resistance:

– Hydraulic cylinders used in harsh operating environments are constructed from materials that exhibit excellent corrosion resistance. Stainless steel, chrome-plated steel, or other corrosion-resistant alloys are commonly used for cylinder components exposed to corrosive substances or environments. Additionally, surface treatments such as coatings, plating, or specialized paints can provide an extra layer of protection against corrosion.

5. Sealing Systems:

– Hydraulic cylinders employ sealing systems that are specifically designed to withstand harsh operating environments. The seals used in hydraulic cylinders are selected based on their resistance to temperature extremes, chemicals, abrasion, and other environmental factors. Specialized seal designs, such as wiper seals, rod seals, or high-temperature seals, are utilized to maintain effective sealing and prevent contamination of the hydraulic fluid.

6. Lubrication:

– Proper lubrication is essential for the smooth operation and longevity of hydraulic cylinders, particularly in harsh operating environments. Lubricants are selected based on their ability to withstand high temperatures, resist oxidation, and provide effective lubrication under extreme conditions. Regular maintenance and lubrication practices ensure that the cylinder components continue to operate smoothly and reduce the effects of wear and friction.

7. Robust Construction:

– Hydraulic cylinders designed for harsh operating environments are built with robust construction techniques to withstand the rigors of such conditions. The cylinder barrels, rods, and other components are manufactured to meet strict quality and durability standards. Welded or bolted construction methods are employed to ensure the structural integrity of the cylinders. Reinforcements, such as flanges or tie rods, may be added to enhance the cylinder’s strength and resistance to external forces.

8. Environmental Protection:

– Hydraulic cylinders can be equipped with additional protective features to shield them from harsh operating environments. Protective covers, boots, or bellows can be used to prevent contaminants, debris, or moisture from entering the cylinder and compromising its performance. These protective measures help extend the service life of hydraulic cylinders in demanding conditions.

9. Compliance with Standards:

– Hydraulic cylinders manufactured for specific industries or applications often comply with industry standards or regulations related to operating temperature ranges, environmental conditions, or safety requirements. Compliance with these standards ensures that hydraulic cylinders are designed and tested to meet the specific demands of their intended operating environments.

In summary, hydraulic cylinders are designed to handle variations in temperature and harsh operating environments by incorporating suitable materials, thermal expansion considerations, heat dissipation mechanisms, corrosion-resistant components, specialized sealing systems, proper lubrication, robust construction techniques, protective features, and compliance with industry standards. These design considerations and features enable hydraulic cylinders to operate reliably and effectively in a wide range of demanding applications and environmental conditions.

hydraulic cylinder

Ensuring Consistent Force Output for Repetitive Tasks with Hydraulic Cylinders

Hydraulic cylinders are designed to ensure consistent force output for repetitive tasks. This consistency is essential for maintaining precise control, achieving uniform results, and optimizing the performance of hydraulic systems. Let’s explore how hydraulic cylinders achieve consistent force output for repetitive tasks:

  1. Design and Manufacturing Standards: Hydraulic cylinders are manufactured to meet strict design and manufacturing standards. These standards ensure that the cylinders are built with precision and accuracy, enabling them to deliver consistent force output. The components, such as the piston, cylinder barrel, seals, and valves, are engineered to work together harmoniously, minimizing variations in force generation.
  2. Pressure Regulation: Hydraulic systems incorporate pressure regulation mechanisms to maintain a constant pressure level. Pressure relief valves, pressure regulators, and pressure-compensated pumps help maintain a consistent hydraulic pressure throughout the system. By regulating the pressure, hydraulic cylinders receive a consistent supply of pressurized fluid, resulting in consistent force output for repetitive tasks.
  3. Flow Control: Flow control valves are utilized in hydraulic systems to manage the flow rate of hydraulic fluid. These valves regulate the speed at which the fluid enters and exits the hydraulic cylinder, influencing the force output. By controlling the flow rate, hydraulic cylinders can achieve consistent force output for repetitive tasks. This is particularly important when it comes to tasks that require precise and uniform force application.
  4. Effective Seal Performance: Sealing systems play a crucial role in hydraulic cylinders by preventing fluid leakage and maintaining pressure integrity. High-quality seals and proper installation ensure effective sealing throughout the cylinder’s operation. By minimizing internal leakage, hydraulic cylinders can maintain consistent force output, even during repetitive tasks.
  5. Maintenance and Inspection: Regular maintenance and inspection of hydraulic cylinders are essential for ensuring consistent force output. By following maintenance schedules, replacing worn-out components, and monitoring cylinder performance, any potential issues that could affect force consistency can be identified and addressed promptly. This proactive approach helps maintain the reliability and performance of hydraulic cylinders over time.

In summary, hydraulic cylinders employ various mechanisms to ensure consistent force output for repetitive tasks. Adherence to design and manufacturing standards, pressure regulation, flow control, effective seal performance, and regular maintenance all contribute to achieving consistent force output. By maintaining precision, minimizing variations, and addressing potential issues, hydraulic cylinders provide reliable and consistent force generation, facilitating the successful completion of repetitive tasks in various applications.

hydraulic cylinder

How do hydraulic cylinders handle variations in load and pressure during operation?

Hydraulic cylinders are designed to handle variations in load and pressure during operation, making them versatile and efficient in various applications. Hydraulic systems use the principle of transmitting force through incompressible fluid to generate linear motion. Here’s a detailed explanation of how hydraulic cylinders handle variations in load and pressure:

1. Load Handling:

– Hydraulic cylinders are capable of handling different loads by utilizing the principle of Pascal’s law. According to Pascal’s law, when pressure is applied to a fluid in a confined space, the pressure is transmitted equally in all directions. In a hydraulic cylinder, the force applied to the piston results in an equal force output at the rod end of the cylinder. The size of the piston and the pressure exerted determine the force generated by the cylinder. Therefore, hydraulic cylinders can handle a wide range of loads by adjusting the pressure applied to the fluid.

2. Pressure Compensation:

– Hydraulic systems incorporate pressure compensation mechanisms to handle variations in pressure during operation. Pressure compensating valves or regulators are often used to maintain a consistent pressure in the hydraulic system, regardless of load changes. These valves automatically adjust the flow rate or pressure to ensure stable and controlled operation of the hydraulic cylinder. By compensating for pressure variations, hydraulic cylinders can maintain a consistent force output and prevent damage or instability due to excessive pressure.

3. Control Valves:

– Control valves play a crucial role in managing variations in pressure and load during hydraulic cylinder operation. Directional control valves, such as spool valves or poppet valves, control the flow of hydraulic fluid into and out of the cylinder, enabling precise control of the cylinder’s extension and retraction. By adjusting the position of the control valve, the speed and force exerted by the hydraulic cylinder can be regulated to match the load and pressure requirements of the application. Control valves allow for efficient handling of variations in load and pressure by providing fine-tuned control over the hydraulic system.

4. Accumulators:

– Hydraulic accumulators are often used to handle fluctuations in pressure and load. Accumulators store hydraulic fluid under pressure, which can be released or absorbed as needed to compensate for sudden changes in load or pressure. When the load on the hydraulic cylinder decreases, the accumulator releases stored fluid to maintain pressure and prevent pressure spikes. Conversely, when the load on the cylinder increases, the accumulator absorbs excess fluid to maintain system stability. By utilizing accumulators, hydraulic cylinders can effectively handle variations in load and pressure, ensuring smooth and controlled operation.

5. Feedback and Control Systems:

– Advanced hydraulic systems may incorporate feedback and control systems to monitor and adjust the operation of hydraulic cylinders in real-time. Position sensors or pressure sensors provide feedback on the cylinder’s position, force, and pressure, allowing the control system to make continuous adjustments to optimize performance. These systems can automatically adapt to variations in load and pressure, ensuring precise control and efficient operation of the hydraulic cylinder.

6. Design Considerations:

– Proper design considerations, such as selecting the appropriate cylinder size, piston diameter, and rod diameter, are essential for handling variations in load and pressure. The design should account for the maximum anticipated load and pressure conditions to ensure the hydraulic cylinder operates within its specified range. Additionally, the selection of suitable seals, materials, and components that can withstand the anticipated load and pressure variations is crucial for maintaining the reliability and longevity of the hydraulic cylinder.

By utilizing the principles of hydraulic systems, incorporating pressure compensation mechanisms, employing control valves and accumulators, and implementing feedback and control systems, hydraulic cylinders can effectively handle variations in load and pressure during operation. These features and design considerations allow hydraulic cylinders to adapt and perform optimally in a wide range of applications and operating conditions.

China Hot selling Single Acting Large Tonnage Lock Nut Hydraulic Jack Cylinder with Low Price   a/c vacuum pump		China Hot selling Single Acting Large Tonnage Lock Nut Hydraulic Jack Cylinder with Low Price   a/c vacuum pump
editor by CX 2023-10-17

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