Newsletter 2021/06

Newsletter position monitoring for directional poppet valves

Directional poppet valves with position monitoring WVM-6I-R

Bieri Hydraulik AG introduces its new directional poppet valves WVM-6I-R with position monitoring. The feature position monitoring enables the detection of the valve piston position. The electrical signals from the non-contact sensors can be used for diagnosis in safety-relevant parts of electronic control systems and in condition recording in the context of industry 4.0.

Thanks to the position monitoring, a higher diagnostic coverage (DC) of the overall system can be achieved, which enables the use in control systems of higher categories.



Technical data

  • 2/2 and 3/2 valve types

  • Monitored positions ROA and RO/RA

  • Directly operated

  • Poppet tight

  • NG 6 ISO

  • Max. flow rate up to 12 l/min

  • Operating pressure up to 500 bar



Our products and services


You will find powerful Radial Piston Pumps up to 1000 bar as well as space-optimizing Axial Piston Pumps with the smallest flow rates and high pressures.


Our valves in nominal sizes 4 and 6 with pressures up to 1000 bar have been well tested and are reliable. They are available in several switching positions and designs.

Systems and accessories

Modular High-Pressure Power Units, Pressure Switches, Level Switches and various accessories complete our product range.

Bieri Hydraulik AG
Könizstrasse 274
CH-3097 Liebefeld

Tel. +41 31 970 09 09