A review of direct drive proportional electrohydraulic spool valves: Industrial state-of-the-art and research advancements

Paolo Tamburrano, Andrew R. Plummer, Elia Distaso, Riccardo Amirante

Research output: Contribution to journalArticle

11 Citations (Scopus)
29 Downloads (Pure)


This paper reviews the state of the art of directly driven proportional directional hydraulic spool valves, which are widely used hydraulic components in the industrial and transportation sectors. First, the construction and performance of commercially available units are discussed, together with simple models of the main characteristics. The review of published research focuses on two key areas: investigations that analyze and optimize valves from a fluid dynamic point of view, and then studies on spool position control systems. Mathematical modeling is a very active area of research, including computational fluid dynamics (CFD) for spool geometry optimization, and dynamic spool actuation and motion modeling to inform controller design. Drawbacks and advantages of new designs and concepts are described in the paper.

Original languageEnglish
Article number020801
Number of pages16
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Issue number2
Early online date5 Oct 2018
Publication statusPublished - 1 Feb 2019


  • CFD
  • control systems
  • direct-drive
  • discharge coefficient
  • flow forces
  • proportional valves

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Instrumentation
  • Mechanical Engineering
  • Computer Science Applications

Cite this