Fluidlexikon
Internal gear pump
Figure I 11: Internal gear pump with axial and radial play compensation
With axial play compensation they can achieve average pressures of up to around 160 bar, while 300 to 320 bar is possible with combined axial and radial play compensation at the sprocket and ring gear (Figure I 11). Their geometric displacement cannot be adjusted (constant pump). External gear pumps are also well suited for low-pressure drives and are an inexpensive alternative.
