Vertical hydraulic jacks, hydraulic jack, jack Product Description: Jack is commonly used in the production of a lifting tool. QYL vertical hydraulic jack is a national stereotypes of new products. Its simple structure, convenient operation, small size, light weight, easy to repair. Widely used in lifting operations facility in warehouses, bridges, docks, construction and other transportation sectors. This product can only be upright use, the working environment temperature of -20 degrees Celsius to +45 degrees Celsius, should not be used in acid and corrosive gases. How it works: hydraulic jack is working according to the principle of Pascal's law. It consists of several parts of the fuel tank, two pressure cylinders of different size, and close the needle valve rocker and so on. When working, the mention of the small piston oil suction pressure cylinders, when pressed into the big small piston hydraulic pressure cylinder. By controlling the two valves, the small piston of the pressure oil is passed to the large piston, the heavy top up. Small reciprocating piston is constantly on top of the weight can be to a certain height. After work, turn off the needle, so much pressure cylinder and oil tank. At this time, just a little pressure on the larger piston, the piston to the whereabouts of a large oil tank to go back