Classroom on demand

Welcome to Classroom on demand, your source for educational materials related to the vertical transportation industry. This site represents the knowledge and expertise of the best engineers and mechanics in the elevator industry, and will help those new to the elevator industry learn about the basic workings of elevator systems, and also will serve as a reference for people with more experience.

Power Unit Module

Power Unit Module: A power unit is used on all hydraulic elevator equipment types. A standard power unit consists of a tank, pump, motor, control valve, and silencer. The power unit pumps oil to push the piston up. It also allows the oil to return to the tank as the car travels down. This diagram shows a submersible power unit located in an adjacent machine room.

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