Whatever its type, a hydraulic pump is a mechanical element that moves a liquid within a circuit. They all operate on a simple physical principle: the creation of a partial vacuum on priming by setting their moving part in motion. The liquid to be displaced is drawn into the pump inlet by the vacuum effect. The liquid is then pressurised by this moving part and released into the entire circuit.
Hydraulic gear pumps are particularly reliable, and are widely used in industrial mechanics and the automotive industry. They can be connected to a motor via a drive shaft and gearbox, or set in motion by a small electric motor. They provide constant pressure to circuits of up to 250 bar.
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