Improve performance, lower costs and reduce environmental impact with Eaton’s new digital PpQ control for Hydrokraft pumps

Date: 9/06/2016

MORGES, SWITZERLAND … Power management company Eaton has launched a digital PpQ control unit for its W-series high pressure pump – Hydrokraft TVW and PVW – which enables users in the marine industry to achieve better control, faster response time, higher reliability, and cost savings through a reduced overall component count. The PpQ unit electronically controls displacement (flow), pressure and power on the pump and additional operational costs and environmental impact may be reduced through energy recovery as the control unit allows the pump to be used 100 percent overcenter, functioning as a motor for counter moving applications like, for example, lifting and lowering.

The Hydrokraft swash plate design variable axial piston pumps help provide reliable operation and a long operation life. The key features of these pumps make them ideal for marine and other similarly demanding offshore and onshore applications. They offer fast response times together with rated pressure of 350 bar (420 peak), rated speed up to 1800 rpm and displacement sizes ranging from 130 cm3 to 500 cm3 per revolution. Reliability and safety is enhanced with oversize shafts and bearings, with pressure balancing of rotating and pressure-loaded parts.

The PpQ control unit comprises an electronic controller and a proportional valve, which controls the pump for pressure, power and displacement, without hydraulic-mechanical control parts. It also adds intelligent mooring control and master/slave functions.

Flow control measures the actual swash-plate position from sensor data, comparing the swash-plate angle with the set value and driving the servo or proportional valve accordingly.

Pressure cut-off control measures pressure in both input and output lines with pressure sensors, reducing output levels if actual pressure exceeds the command signal. This adjusts the pump exactly to the application needs. Power cut-off control calculates actual power by measuring pressures and swash plate angle, which is directly proportional to flow.

A master to slave function allows several pumps to be used to facilitate large-scale applications with high flow demand. In this mode the master pump can be used over its full operational and flow span, while the slave pumps follow the master pump settings. A through drive allows multiple pumps from a single shaft.

The electronic PpQ control is implemented with Eaton’s ER9.X-10 digital amplifier and controller card assembly, which meets industrial EMC, EMV, shock and vibration standards. It features four seven-segment displays and six buttons to adjust card parameters easily. Configuration is also possible via an RS232 serial interface and the ER9.X-Tool software provided.

“Eaton works closely with its customers in the marine industry worldwide, providing expert advice on how they can operate efficiently,” said Giuseppe Scozzarella, product manager, EMEA Industrial Hydraulics at Eaton. “For example, in one innovative large-scale marine application, Eaton adapted its Hydrokraft pumps with electronic controls for use with intelligent MAN diesel engines, saving fuel and reducing emissions.”

He continued, “As well as marine implementations, the Hydrokraft pump range, with their modular design, suit many demanding applications like offshore installations, test rigs and simulators, materials handling and recycling, primary metal power units and oil and gas production. And by applying the pumps, our customers will gain a competitive advantage and reduce costs.”

To learn more about Eaton’s Hydrokraft pumps with digital PpQ control visit

Eaton’s hydraulics business is a worldwide leader in supporting companies that want to increase efficiency, reliability and safety within industries including – construction and mining, agriculture and forestry, traditional and renewable energy, manufacturing and processing, oil and gas, transportation and material handling. The global Hydraulics team designs, manufactures and markets a comprehensive line of reliable, high-efficient hydraulic and industrial systems including electro-hydraulics, fan drive, hybrid and steering solutions to leading edge components including adapters, couplings, cylinders, fittings and assemblies, hose and tubing, motors, pumps and valves. For more information and to view the well- known product brand portfolio, please visit

Eaton is a power management company with 2015 sales of $20.9 billion. Eaton provides energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton has approximately 96,000 employees and sells products to customers in more than 175 countries. For more information, visit

Gabriella Paranyi, +36 30 250 7210