Parker Automation
VSO Series Miniature Proportional Valve

Key Features

  • Enables precise flow control for improved instrument accuracy
  • Thermally compensated to maintain precise flow over a wide range of media
  • Computer automated calibration and serialization for performance traceability
  • Cleaned for Oxygen and Analytical Service use
  • Proven performance tested to 100 million life cycles
  • RoHS compliant


  • Pressure & Flow Control
  • Gas Chromatography
  • Ventilators
  • O2 Concentrators/Conservers
  • Anaesthesia Delivery & Monitors
  • Mass Flow Control
  • Mass Spectrometry

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The VSO® miniature proportional valve provides enhanced flow control for applications where precise control flow control is required up to 56 slpm. The VSO® miniature proportional valve provides precise flow control of gas in proportion to input current. The valve can be controlled with either DC current or pulse width modulation along with closed loop feedback to deliver optimal system performance. Together with its ability to provide precise control over varying temperatures and media types, the VSO® miniature proportional valve is ideally suited for manufacturers of medical and analytical equipment.