The biggest advantages of hydraulic oil are its tremendous power density and the transfer of high forces, and this in a compact design and with high dynamics. Where the toughest conditions prevail and the same reliability and durability are demanded, this is exactly where Wepuko oil hydraulic pumps are used and where they prove their worth. And for good reason. Because the 80 years of expertise of the pump pioneer Wepuko “flows” into every one of our radial piston pumps. Our pumps with variable as well as constant flow rates are particularly in demand at pressures between 300 and 420 bar in normal conditions, and up to 1000 bar in special applications.
Of course, we not only supply individual pumps, but also provide solutions to the problems of our customers, in the form of small units or large hydraulic systems up to 30 MW of installed capacity.
A speciality of Wepuko PAHNKE – the PMSD drive
PMSD stands for PAHNKE Modified Sinusoidal Direct drive. This is a specialty in the field of press drives, developed by PAHNKE Engineering in accordance with plans from Hans-Joachim Pahnke.
This drive does not need any valves for the control of the press movement, but works with the quicklycontrollable Wepuko PAHNKE RX-series high-pressure pumps to be able to determine the force, the speed, and the direction of movement of the press. This drive system is characterised by a particularly smooth operation (free of shocks) and thus extreme reliability, not least because the pumps in this equipment last for at least 30,000, sometimes much more than 50,000 hours of operation without needing repair.
Another elementary advantage is the fact that this drive system needs considerably less energy than any comparable drive. The energy saving can be between 20 % and 30 %, depending on the design, in comparison to other oil-hydraulic drives and up to more than 60 % in comparison to waterhydraulic
drives. All of the new presses mentioned above with hydraulic drives have a drive in accordance with the PMSD principle.