- A hydraulic pump converts mechanical energy into hydraulic energy. … A pumpproduces liquid movement or flow: it does not generate pressure. It produces the flow necessary for the development of pressure which is a function of resistance to fluid flow in the system.
- When a hydraulic pump operates, it performs two functions. First, its 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. … A pump produces liquid movement or flow: it does not generate pressure.