Duplex - Graphite Disks


The DUPLEX Type Graphite Disk is the best choice for applications involving highly oxidizing agents and halogens.


  • The best choice for applications involving highly oxidizing agents and halogens
  • Disks extend corrosion resistance by utilizing a liner on the flat surface of the disk that contacts the process media
  • Disks are capable of resisting virtually any corrosive except elemental free fluorine
  • Sizes 1/2” (13 mm) thru 24” (610 mm) diameters
  • Designed to fit industry standard flanges ASME B16.5, ISO and JIS
  • Burst ratings 0.50 psig (0.03 barg) to 1000 psig (68.95 barg) or higher
  • 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 (2.76 barg)
  • Temperature ratings –290°F to +700°F (–143°C to +371°C) Maximum temperature rating without insulation is 430°F (221°C) or 700°F (371°C) with insulation. 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
  • External type vacuum supports are available for vacuum service (Contact ZOOK when vacuum is present)
  • All flange group 2 disks are armored
  • Liners available: PTFE (Standard Liner), PFA and FEP. Contact ZOOK for further materials available
  • ASME (UD) and PED (CE) compliance available


Duplex Specifications