Drive system with closed oil circuit
Frequency-controlled pump units with closed oil circuit enable hydraulic drive systems with an oil volume reduced by up to 75% and improved efficiency.
Unlike the conventional design of hydraulic pump units, filtering and cooling is performed in the secondary circuit in these systems. This results in advantages in oil conditioning, monitoring and maintenance. The main oil flow, which is used to control the differential speed of the scroll drive (ROTODIFF®) or the bowl drive, is operated in a closed loop.
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