The TWO-WAY Type Graphite Disk is dual rated to protect against two different pressures in opposite directions.


  • Applications include protection of storage tanks against both excess vacuum and overpressure when single vessel entry is required
  • Designed to fit ASME B16.5, PN and JIS Flange Classes. Contact ZOOK for Class 300 Flange requirements
  • Burst Ratings of 0.25 to 1,000 psig

Options / Accessories

  • Optional liner available on flat side of disk to extend corrosion resistance
  • ASME UD, PED/CE and TUV markings available
Two-Way Graphite Disk

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