A hydraulic lifts is a device for moving objects using force created by pressure on a liquid, inside a cylinder that moves a piston upward. In this compressible oil is pumped into the cylinder, which forces the piston upward. When a valve opens to release the oil, the piston lowers by the gravitational force.
It is suitable for the site where less pit and low head room is available. These elevators are energy savers as there is no power used downwards. In case of power failure, elevator can be called downwards by rotating emergency knob.
