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.

Submersible Pump Unit

The up movement of hydraulic equipment types is achieved by pumping a certain volume of oil (gallons per minute or GPM) into the jack. Submersible pumps come in several sizes, and each moves a different, constant volume of oil (GPM). Submersible pumps are coupled directly to the motor with bolts. The motor turns at a constant speed (revolutions per minute or RPM). The pump is either pumping oil at full volume or not at all; it is either on or off.

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