Hydraulic elevators are preferred to machine driven elevators in some applications due to their different features. Although their speed is much lower than machine-driven elevators and their electricity consumption is higher, they should be preferred in some architectures due to their structure.
Hydraulic control panels are manufactured with 3 different engine driving techniques, which will drive the hydraulic systems optimally. These techniques can be summarized as driving directly, star-delta, soft star ter  according to engine power, elevator travel speed and comfort expectations. In hydraulic elevator control, motor driving technique and control type of hydraulic elevator valves should be designed according to the project and hydraulic unit type.