SAUNDERS® Serial Weir

Saunders® Serial Weir design typically incorporates a common chamber shared by two weirs or operating points. The Tandem valve (Sterile Access Valve) is the most common design variation and is available in machined block or fabrication welded orientation to suit customer specification.

Features And Benefits

  • Machined Block construction, free from internal fabrication welds to enhance structural integrity
  • Zero or minimum deadleg – depending on selected orientation
  • Reduced internal wetted area to optimise CIP/SIP cycle time
  • Highly compact size envelope provides ideal solution

Technical Details


Incorporating a common chamber shared by two weirs or operating points, Serial weir options minimise the distance between associated valves to reduce internal wetted area, improve cleanability and minimise risk of contamination. Available in the following design orientations to provide flexibility in system design and configuration:

  • Main Valve Horizontal, Tandem or Purge Vertical
  • Main Valve Vertical, Tandem Purge Horizontal
  • Main Valve and Tandem Purge both Horizontal


  • Standard 316L ASTM A-479
  • DIN 1.4435, AL6XN, Hastelloy and other materials available on request


  • DN8 (0.25”) – DN100 (4.00”)