SJZ series double acting hollow hydraulic jack

Double acting hollow hydraulic jack
Stretching force: 30-150ton

Journey: 38-258mm

Maximum working pressure: 70MPa

characteristic:
Double acting design, hydraulic reset.

The hollow plunger design can be used for both tension and thrust.

The dual dust ring structure keeps the inside of the oil cylinder clean.

The special guide ring design provides support for the offset center pressure and effectively prevents direct friction between the piston rod and the inner wall, reducing wear and extending the service life of the hydraulic cylinder.

The safety valve prevents damage caused by overpressure.

The painted surface has stronger corrosion resistance.

The outer ring thread of the cylinder body, the inner thread of the piston rod, and the bottom mounting hole provide reliable and convenient installation.

All models come with NPT3/8 "-18 quick couplings and dust caps.

Floating center tube extends product lifespan.

Can be customized according to customer needs.

Usage of double acting hollow hydraulic jack:
1. Before use, it is necessary to check if all parts are functioning properly.
2. When using, the main parameters should be strictly followed, and overloading should be avoided. Otherwise, when the lifting height or lifting tonnage exceeds the regulations, serious oil leakage will occur at the top of the oil cylinder.
3. When the oil volume of the manual pump body is insufficient, it is necessary to first add hydraulic oil that has been thoroughly filtered to the pump before it can work.
4. Please refer to the user manual for the electric pump.
5. The center of gravity of heavy objects should be chosen moderately, and the force point of the jack should be reasonably selected. The bottom should be leveled, and the soft and hard conditions of the ground should be considered. Whether to pad with tough wood and place it steadily should be ensured to avoid sinking or tilting of the load.
6. After lifting the heavy object with a jack, it should be firmly supported with a support in a timely manner. It is forbidden to use the jack as a support. If you need to support heavy objects for a long time, please use a self-locking jack.
7. When several jacks are needed to lift at the same time, in addition to correctly placing the jacks, multiple diversion valves should be used, and the load of each jack should be balanced, paying attention to maintaining synchronous lifting speed. It is also necessary to consider the possibility of the ground sinking due to uneven weight, in order to prevent dangerous tilting of the lifted object.
8. When using, first connect the quick connector of the manual pump to the top, then select the position and tighten the oil drain screw on the oil pump to start working. To lower the piston rod, slightly loosen the handwheel of the manual oil pump in a counterclockwise direction, unload the oil cylinder, and gradually lower the piston rod. Otherwise, if the descent speed is too fast, it will pose a danger.
9. This jack is a spring reset structure that can be quickly removed after lifting, but cannot be pulled by a connected hose.
10. Due to the small lifting stroke of the jack, users must not exceed the rated stroke when using it to avoid damaging the jack.
11. Avoid severe vibration of the jack during use.
12. Not suitable for use in workplaces with acidic, alkaline, and corrosive gases.
13. Users should regularly inspect and maintain according to their usage.