The design of the internal gear pumps, series QXEH, is completely focused on high customer benefits. The pumps are ideal for use with variable speed drives over a very wide speed range and for operation in reverse mode. They work with just one gear stage, and thanks to their compact design they can be incorporated in machines in a particularly space-saving manner. The QXEH range displays further advantages in difficult environments with high cyclic loading: the rugged design provides high reliability throughout the long service life and enables the pumps to be used with various pressure media, because even with critical fluids they resist cavitation. The minimised number of moving parts and the special tooth geometry ensure maximum acceleration values. This shortens the cycle time, which raises the productivity of the machine. Compared to other drives, including gap-compensated internal gear pumps, the QXEH range offers distinct advantages in this area.