What type of power transmission uses pressurized fluid?

Hydraulic power transmission is characterized by the use of pressurized fluid to transmit power. In hydraulic systems, a fluid—typically oil or water—is pressurized in a closed system and used to transfer force through hydraulic cylinders or motors. This method is effective for generating high torque with relatively small components, making hydraulic systems ideal for heavy machinery and equipment, particularly in construction and industrial applications. The ability to exert a large amount of force through fluid pressure allows for precise control of movements, which is crucial in many mechanical operations.

Pneumatic systems also use pressurized fluid but rely on compressed air rather than liquid fluid. Mechanical power transmission involves physical components like gears, belts, and chains to transfer power, while electrical power transmission uses electrical energy to operate devices. Each of these methods has different applications and characteristics, but hydraulic power stands out for its ability to handle significant loads with efficiency and control.