A hydraulic pump is a mechanical device that converts mechanical power into hydraulic energy. Hydraulic pumps work through displacement – which is the amount of liquid transferred from a pump’s inlet to its outlet in one revolution or cycle.
During operation, it performs two functions. Mechanical action creates a vacuum at the pump inlet which allows atmospheric pressure to force liquid from the reservoir into the inlet line to the pump. Next, it delivers this liquid to the pump outlet and forces it into the hydraulic system. The flow generates enough power to overcome pressure induced by the load.
Often, hydraulic pumps are used in high-pressure environments such as hydraulics and manufactured for a wide variety of systems.