Hydraulic elevators are powered by a piston that travels inside a cylinder, controlling the ascent and descent of the elevator Cab.

The Piston is controlled by an electric motor and valve system that regulates the flow of oil to the cylinder for a smooth ride.

While there are several types of hydraulic elevator, the example below illustrates the components that make up a conventional, hydraulic systems.

The maximum travel distance for an elevator of this type is approximately 18 mtrs (60 feet).