Self-locking type hydraulic jack
A self-locking hydraulic jack is a special type of hydraulic lifting device that uses a ratchet, pawl, or hydraulic lock to automatically lock the piston position after lifting to the correct position, thus maintaining the load for an extended period without the need for continuous hydraulic pressure. Prioritize products with CE and ISO9001 certifications to ensure reliable quality.
A self-locking type hydraulic jack is a specialized hydraulic lifting device that incorporates a mechanical or hydraulic locking mechanism to hold its position under load without requiring continuous hydraulic pressure. This feature enhances safety, stability, and energy efficiency—especially in applications where loads must be held for extended periods or in the event of hydraulic system failure.

Description of the self-locking type hydraulic jack:
1. The tonnage of the self-locking type hydraulic jack ranges from 55- 1000 tons, and its stroke ranges from 50-300mm.
2. A self-locking type hydraulic jack is used for supporting heavy loads in the long term; it can support heavy loads without oil pressure, safe and reliable.
3. It could be used underwater, single acting, return with loading, nut can be locked automatically, making loading more safe, especially in large projects. It is easier to operate and control, it has a pressurizer, a pre-relief valve prevents to over load in the cylinder to protect the jack.
4. The connection of the device adopts high-pressure and thread coupling, it has the function of quick use, and it also conquers the disadvantage of oil leaks.

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, typical applications:
1. Self-locking jacks are used wherever a hydraulic failure would be disastrous.
2. Heavy Construction & Steel Erection: Holding up steel beams or pre-cast concrete panels while they are permanently bolted or welded into place.
3. Bridge Lifting and Maintenance: Supporting bridge decks or girders during repair or replacement.
4. Power and Petrochemical Plants: For precise alignment of heavy equipment (turbines, reactors, transformers) where safety and stability are paramount.
5. Aerospace Industry: Supporting aircraft during maintenance and assembly.
6. Shipbuilding: Holding large sections in place during assembly.
7. Any “Lock-out/Tag-out” Scenario: Where workers need to go under a load supported by the jack.

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

All the tonnage, stroke, and height can be customized according to the client’s requirements. We will supply the best quality and service. Our warranty period is 2 years.