The QSB quarter swing valves are compact, quick acting, high conductance isolation valves. The QSB valves have a polished, stainless steel, ISO flanged body with fluoroelastomer O- ring sealed valle plate and shaft. The valve plate O-ring groove is vented to help maintain a stable high vacuum. The valve shaft O-rings and bearings are lubricated with Fomblin® grease to prevent gas bursts from behind the shaft seals.

QSB Quarter Swing Butterfly Valves

Features and benefits

  • Manual operation
  • High conductivity
  • Resists atmosphere in either direction
  • Compact and quick acting
  • Corrosion resistant construction



Click here to download the PDF file: Measurement and Control

Click here to download the PDF file: Vacuum Valves and Fittings

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