500 tons type hydraulic jack units

We completed final test of 500 tons type hydraulic jack on March 30th.
The units use for loading/unloading of heavy object together with using of moving equipment what was also completed at same time.

Outline of jack unit
Model : Double-acting jack with safety nut
Dimension : Height 1,500 mm Base plate 900 x 900 mm
Stroke : 500 mm
Pushing capacity : 500 tons/unit
Jack up/down speed: 16 mm/min (4 units at same time)
Speed fluctuation : ±5 % (jack up) ±20 % (jack down)
Oil pressure unit : 3.5 L/min