Hydraulic Jack Tension Machine
Prestressing Steel Wire Tension Machine
A prestressing steel wire tension machine is a specialized piece of equipment used to apply accurate and controlled tensile force to prestressing steel wires or strands before or during concrete casting. It is a key machine in the production of prestressed concrete components, such as wall panels, hollow core slabs, beams, columns, and fence panels.
Also known as a Hydraulic Jack Tension Machine or Prestressing Strand Tension Machine, this equipment ensures that steel wires or PC strands reach the required tension level, allowing concrete products to achieve higher load capacity, reduced cracking, and longer service life.
As a professional supplier and exporter of Hydraulic Jack Tension Machine in China, Kelai Machinery is committed to providing customers with high-quality, reliable, and cost-effective prefabricated concrete machinery.
For inquiries about precast concrete machinery suitable for your products, please contact us at [email protected]. We’re happy to assist you.
Accurate tension control for prestressing steel wire and PC strand
Stable hydraulic system for consistent and safe operation
Suitable for both pre-tensioning and post-tensioning applications
Improves concrete strength, crack resistance, and durability
Reduces material consumption while increasing load-bearing capacity. etc.
| Machine Model | Rated Tension Force | Strand Capacity | Stroke Length | Center Hole Diameter | Rated Oil Pressure |
|---|---|---|---|---|---|
| Y240Q (Light Duty) | 240 kN | 1 strand | 200 mm | Φ3-20 mm | 50 MPa |
| Y100B (Standard) | 1000 kN | 1 – 7 strands | 200 mm | Φ20-78 mm | 50 MPa |
| Y400B (Heavy Duty) | 4000 kN | 12 – 27 strands | 200 mm | Φ78-165 mm | 50 MPa |
| Specifications can be customized according to project requirements. | |||||
1. High-Precision Hydraulic System
Feature: Equipped with premium imported seals and high-pressure alloy cylinders.
Benefit: Ensures the Hydraulic Jack Tension Machine operates without leakage or pressure drops. This guarantees consistent tension values, meeting the most stringent structural safety codes.
2. Smart Digital Control Integration
Feature: Optional compatibility with intelligent digital tensioning systems (automatic data logging).
Benefit: Eliminates human reading errors. The system automatically generates tensioning reports, significantly simplifying the quality inspection and acceptance process.
3. Versatile Compatibility
Feature: Hollow plunger design with interchangeable anchor accessories.
Benefit: A single Prestressing Strand Tension Machine can be adapted to different strand diameters (e.g., 12.7mm, 15.24mm, 17.8mm) simply by changing the wedges, reducing equipment overhead costs.
4. Rapid Retraction Technology
Feature: Optimized return oil circuit design for faster piston reset.
Benefit: Increases the retraction speed by 30%, drastically shortening the cycle time per strand. This is a game-changer for high-volume projects like bridge decks and pre-cast yards.
5. Rugged Industrial Build
Feature: Hardened alloy steel construction with a wear-resistant, anti-corrosive coating.
Benefit: Built to withstand the harshest environments, from humid tunnels to dusty pre-cast plants, minimizing maintenance downtime and extending service life.
A prestressing steel wire tension machine operates by using a hydraulic jack tension system combined with a high-strength anchoring mechanism to securely grip prestressing steel wires or PC strands. This system ensures accurate and stable tensioning throughout the prestressing process.
During operation, the working steps are as follows:
Prestressing steel wires or strands are firmly positioned and locked between heavy-duty anchors, ensuring safe and slip-free tensioning.
The hydraulic jack tension machine applies a controlled and measurable tensile force according to the structural design requirements, guaranteeing consistent prestress levels.
The required tension is maintained while concrete is poured, compacted, and cured, allowing the prestressing force to be fully transferred into the concrete structure.
After the concrete reaches the specified strength, the tension is gradually released. The stored tensile force in the steel wire or strand converts into compressive stress within the concrete, significantly enhancing its performance.
Through this process, a prestressing strand tension machine greatly improves the load-bearing capacity, crack resistance, and long-term durability of precast concrete components.
A Hydraulic Jack Tension Machine is widely used in:
Precast concrete wall panel production lines
Hollow core slab manufacturing plants
Precast beams, columns, and floor slabs
Boundary wall and fence panel production
This equipment is also commonly known as a Hydraulic Jack Tension Machine or a Prestressing Strand Tension Machine, depending on its driving system and the type of steel reinforcement used. etc.
A Prestressing Strand Tension Machine (commonly referred to as a Hydraulic Jack Tension Machine) is a specialized high-pressure power device used to apply precise tensile force to steel wires, strands, or tendons.
In modern construction, this machine is the heart of the “prestressing” process. By stretching the steel before or after the concrete is poured, the machine creates internal compressive forces that allow concrete structures to handle much heavier loads and longer spans without cracking.
The system typically consists of three integrated parts:
The Hydraulic Jack: The heavy-duty actuator that performs the physical pulling.
The Electric Oil Pump: Provides the high-pressure hydraulic fluid required to move the jack.
The Control System: Often featuring digital displays to ensure the Prestressing Strand Tension Machine reaches the exact “kilo-newton” (kN) requirements specified by the structural engineer.
Compared with mechanical tension systems, a hydraulic jack tension machine offers higher precision, better safety, and easier operation. It is especially suitable for modern precast concrete factories that require high efficiency, repeatable accuracy, and reliable prestressing performance.
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Our Frequently Asked Questions section provides clear and practical information about our precast concrete machinery, including hollow core slab machines, wall panel extrusion equipment, and complete precast production lines. Here you can learn more about machine performance, production capacity, installation support, customization options, delivery time, and after-sales service.
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Reliable quality control system
Technical support & training available
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Customized solutions for different projects
A hydraulic jack tension machine uses a high-pressure hydraulic system to pull prestressing steel wires or strands to a specified force. The tension is maintained during concrete casting and curing, then released to transfer compressive stress into the concrete structure.
The machine can handle various diameters of prestressing steel wire and PC strand, depending on the model and configuration. Customized gripping systems are available to meet different project requirements.
This machine is widely used in precast concrete production lines, including wall panels, hollow core slabs, beams, columns, floor slabs, boundary walls, and other prestressed concrete elements.
Yes. The machine can be customized according to tension force (kN), wire or strand diameter, hydraulic pressure range, control system type, and production line layout.
Compared with mechanical systems, hydraulic prestressing tension machines offer higher accuracy, smoother force control, improved safety, and easier operation, making them ideal for modern precast concrete factories.
If you are looking for a reliable hollow core slab molding machine for your precast concrete production line, feel free to contact us for more details and quotations. Our technical team will recommend the most suitable model according to your production capacity and project requirements.
