From a construction point of view, at the time of installation, repair or maintenance, the hydraulic lift is safer because it is installed at a low height and maintenance is generally carried out at ground level. The opposite occurs with the electric lift, since the assembly with heavy elements (counterweight) is carried out at a height (motor at the top of the shaft).
On the other hand, in emergency situations the evacuation manoeuvre is much simpler than with an electric lift: we can release the passengers manually without the need for external help thanks to a hand pump, integrated in the control unit, which serves to unlock the cabin (this manoeuvre can even be carried out by non-specialised personnel). The lift ends up descending by the force of gravity with the help of a small emergency battery that operates in the event of a power failure.
Considering the increasing number of elevators installed, especially in residential buildings (single-family homes), it is important that a family member knows the procedure by which the cabin can be lowered manually to the ground floor in order to free a passenger in the event of a power failure or any other emergency. This method is the safest due to the slow speed of the manual hydraulic elevator system, accessible from the ground floor and easy to repair.
Continued in Safety of hydraulic elevators (II)
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