Hydraulic pumps

A hydraulic pump converts the rotation of an engine, power take-off or electric motor into a volumetric flow of oil. This category includes gear pumps, double pumps and helical gear pumps for mobile machinery, power units and trucks, as well as hand pumps. Selection starts with flow and pressure, and the flow is calculated from the displacement and the speed. Equally important is that the pump fits the power source: the shaft, flange and direction of rotation determine whether it can be fitted.

The range covers the most common interfaces, such as tapered and SAE splined shafts, the tractor 1 3/8" PTO, SAE and ISO 3019 flanges, and threaded and flanged ports. Aluminium-body gear pumps have a maximum operating pressure of 100–260 bar depending on size, and cast iron models have a continuous pressure of up to 290 bar. A double pump provides two separate circuits from the same shaft. Suction fittings, connection flanges, bypass valves and seal kits have their own groups.

When the pressure rises to 350–400 bar or the flow must follow the load, choose a piston pump.