Two-Way

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

  • Applications include protection of storage tanks against both excess vacuum and over-pressure when single vessel entry is required
  • Designed to fit ASME B16.5 Class 150 flanges. Contact ZOOK for ASME B16.5 Class 300 flanges
  • 0% manufacturing range
  • Operating pressures to 90% of the disk’s marked burst pressure (Contact ZOOK for operating ratio for burst pressures below 40 psig)
  • Temperature ratings –290°F to +430°F (–179°C to +221°C). Contact ZOOK for higher temperature ratings. The specified temperature shall be at the disk location at the time when the disk is expected to rupture
  • Optional liner available on flat side of disk to extend corrosion resistance
  • Carbon steel armor standard, 316SS optional
  • Furnished complete with TFE gaskets attached. Other gasket materials are available
  • Generally a minimum differential of 10 psi is required between burst ratings. Contact ZOOK for other burst rating combinations