Reciprocating hydraulic pump EPU

radial pistoninternal-gearelectro-hydraulic

Overview
The electrohydrostatic pump unit (EPU / EPU-G) from Moog is the core of electrohydrostatic drive systems and enables the realization of high-performance decentralized drives. It makes a hydraulic power pack and complex piping unnecessary and helps reduce the overall machine footprint. The compact product design features a connection interface that allows direct mounting to a cylinder or valve block, minimizing the additional space required on each axis.

Functions and features
The EPU(-G) meets customer requirements for functionality, modularity, electrification, energy efficiency, robustness, serviceability and sustainability. Thanks to its compact design and simple handling, extensive hydraulic expertise is not required, enabling flexible integration into existing machines.

Pump types and nominal sizes

• EPU-G: nominal sizes 13 and 20, use an internal gear pump to generate flow.
• EPU: nominal sizes 19, 32, 80 and 140, use a radial piston pump. These radial piston pumps are available in two versions: fixed or variable displacement.

Advantages

• High energy efficiency.
• Reduces oil volume by up to 90%, supports sustainable and clean operation, lowers maintenance and operating costs and reduces fire risk.
• Ability to generate high forces provides a practical alternative to electrohydrostatic (EH) drive systems.
• Connection interface enables direct mounting, reducing piping and maintenance effort as well as machine footprint.
• Self-contained, compact product design.
• Four-quadrant operation.

Characteristics / Technical specifications

• Product family: EPU (Electrohydrostatic Pump Unit) / EPU-G.
• Compact, enclosed design; direct mounting to a cylinder or valve block possible.
• Pump types: internal gear pump (EPU-G, nominal sizes 13 & 20) and radial piston pump (EPU, nominal sizes 19, 32, 80, 140).
• Radial piston pumps available as fixed or variable displacement.
• Eliminates external hydraulic power pack and complex piping; minimizes required machine space.
• Increases energy efficiency and significantly reduces oil volume (up to 90%).
• Robustness, serviceability and support for electrification and sustainability requirements.
• Four-quadrant capability (bidirectional power capability).