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Jiaxing Weiying Industry And Trade Co., Ltd., a professional manufacturer established in 2004, proudly introduces the 25 Ton Hydraulic Jack with Four-Point Linkage and Hydraulic Lock Valve, engineered specifically for demanding bridge repair projects. Our jack combines robust construction with advanced hydraulic technology to deliver synchronized lifting force and secure load holding. With a factory area of 10,000 to 30,000 square meters and an experienced team of 51 to 100 employees, we ensure reliable manufacturing and strict quality control. This product is designed to improve safety and efficiency in heavy lifting operations, making it an ideal choice for contractors, construction firms, and infrastructure maintenance teams.
Product Overview
The 25 Ton Hydraulic Jack is a high-capacity lifting device featuring a four-point linkage system that ensures uniform load distribution and simultaneous height adjustment. It is equipped with a hydraulic lock valve that prevents unexpected descent, providing a secure work environment during bridge repair and maintenance. The jack is built to withstand harsh construction site conditions and offers precise positioning capabilities, which are essential for aligning heavy bridge components.
Key Features
- High Capacity: Rated at 25 tons, suitable for large structural lifting tasks.
- Four-Point Linkage: Synchronizes the movement of all lifting points to avoid uneven stress on the structure.
- Hydraulic Lock Valve: Automatically maintains load position even if the pump loses pressure, protecting operators and equipment.
- Durable Construction: Made from high-strength steel components with protective coatings for long service life in outdoor environments.
- Easy Operation: Designed with simple controls, reducing training time and minimizing operational errors.
- Portable Design: Compact footprint with lifting handles for convenient transport between work sites.
- Customizable Configurations: Optional stroke lengths, base sizes, pump types, and coatings are available upon request.
Technical Specifications
| Parameter | Value |
| Rated Capacity | 25 tons |
| Lifting System | Four-point mechanical linkage + hydraulic cylinders |
| Locking System | Hydraulic lock valve with automatic pressure holding |
| Primary Material | High-strength alloy steel |
| Surface Finish | Anti-corrosion paint / optional hot-dip galvanized |
| Operation Mode | Manual hydraulic pump / electric pump (optional) |
| Stroke | Customizable (standard range available upon request) |
| Applications | Bridge repair, steel structure installation, tunnel support, heavy equipment positioning |
Working Principle
The four-point linkage system connects multiple hydraulic cylinders through a set of synchronized pivot arms. When hydraulic pressure is applied, all cylinders extend simultaneously, moving the lifting points at an equal speed and stroke. This minimizes torsion and bending moments on the load, which is critical when raising precast concrete beams or steel girders during bridge rehabilitation. The integrated hydraulic lock valve is positioned inside the oil circuit to create a one-way sealing effect. Once the lifting stroke reaches the desired height and the pump stops, the valve closes instantly, trapping the oil in the cylinder and holding the load securely without continuous energy consumption.
Operational Safety
Safety is the top priority in any bridge repair project. This jack is designed with several protective elements:
- The hydraulic lock valve prevents accidental lowering caused by hose leakage or pump failure.
- The four-point linkage reduces the risk of uneven load distribution that could lead to tilting.
- The wide steel base increases contact area with the ground, enhancing stability.
- Optional overload protection devices can be integrated to alarm when approaching rated limits.
- All exposed components are treated to resist weather and corrosion, ensuring safe use in outdoor environments.
Because of these features, workers can operate the jack with confidence, even when performing precision tasks such as bearing replacement or deck leveling. The jacks can also be used in groups, with the four-point linkage providing consistent performance across multiple units.
Why Choose Our Hydraulic Jack?
- Proven Manufacturing Experience: With more than 20 years in the mechanical industry, we have refined our production processes to deliver dependable equipment.
- Customization Capacity: Our engineering team can modify stroke, cylinder positioning, pump connections, and safety options to match project requirements.
- Global Shipping: Direct shipment from Shanghai, Ningbo, Guangzhou, or Qingdao ports ensures timely delivery for international clients.
- After-Sales Support: We provide technical documentation, spare parts, and responsive communication for maintenance and troubleshooting.
- Cost Efficiency: Our factory-direct pricing reduces procurement costs without compromising quality.
Application Scenarios
This hydraulic jack is primarily used in bridge repair and construction, but its versatility extends to other heavy lifting tasks:
- Bridge bearing replacement and temporary support
- Jacking of concrete box girders and steel beams
- Leveling of large industrial equipment and machinery
- Construction of overpasses, viaducts, and elevated roadways
- Emergency structural stabilization in repair campaigns
For large-scale projects, multiple jacks can be used in synchronized sets. The four-point linkage makes it easier to coordinate several units, reducing the time required to lift a span and improving overall project efficiency.
At Jiaxing Weiying Industry And Trade Co., Ltd., we maintain a strong quality management system throughout our 10,000 to 30,000 square meter factory. Our team of experienced engineers and operators conducts strict inspections at every stage, from raw material selection to final assembly. With annual exports between US$1 million and US$1.5 million, our products are shipped to trusted partners across North America, South America, Eastern Europe, Southeast Asia, the Middle East, Eastern Asia, Western Europe, and other regions. We are dedicated to supplying high-performance lifting equipment that meets the needs of the global construction and infrastructure market.
Choosing our 25 Ton Hydraulic Jack means investing in safety, durability, and precision. We invite procurement managers, project engineers, and contractors to contact us for detailed specifications, customization options, and quotations. Our responsive team is ready to help you select the right configuration for your bridge repair projects. With rigorous quality checks, reliable export experience, and strong engineering support, we are confident that our product will exceed your expectations. Place your order now and benefit from a trustworthy B2B partner headquartered in Jiaxing, Zhejiang, China.
Frequently Asked Questions
Q1: What is the main advantage of a four-point linkage hydraulic jack?
A: The four-point linkage ensures synchronized lifting of all support points, preventing uneven load distribution and reducing the risk of structural damage. It is especially helpful for long-span bridge components.
Q2: How does the hydraulic lock valve work?
A: When lifting is completed and the pump is released, the lock valve closes automatically and seals the hydraulic fluid inside the cylinder. This holds the load at the desired height without depending on continuous pump pressure.
Q3: Can this jack be used for purposes other than bridge repair?
A: Yes, it is well suited for industrial maintenance, steel structure installation, heavy equipment positioning, and any application that requires safe and accurate lifting of heavy loads.
Q4: Is customization available?
A: Absolutely. We can adjust stroke length, base dimensions, pump type, hydraulic fittings, and surface coating. Please provide your requirements, and our engineering team will offer a tailored solution.
Q5: What safety features are included?
A: The standard design includes the hydraulic lock valve, four-point synchronization, and a robust steel base. Optional overload alarm systems and anti-slip pads can also be added based on your needs.
Q6: What is the typical lead time for export orders?
A: For standard products, lead time is usually 15 to 25 days after order confirmation. Customized configurations may require 25 to 40 days depending on complexity. We will provide an accurate schedule when you inquire.
Q7: Do you provide after-sales support?
A: Yes, we offer technical guidance, maintenance documentation, and spare parts supply. Our support team is available to help with installation, operation, and troubleshooting.
Q8: What are the available shipping ports?
A: We ship from Shanghai, Ningbo, Guangzhou, and Qingdao ports. We can work on FOB, CIF, CFR, or other incoterms according to your purchasing preferences.
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