FAX - Forward Acting Disks


The FAX forward acting rupture disks (bursting discs) are a solid metal cross-scored disk design. Designed to be used in the FAH Pre-Torque holder.


  • A Fail-Safe Design. If the disk is damaged or incorrectly installed, it will always burst at or below the marked burst rating as indicated on the disk tag
  • Designed for Non-fragmentation
  • Operating ratios up to 90% of the low end of burst tolerance
  • Disk design offers high cycle life
  • Excellent for liquid, gas or 2 phased flow
  • Standard manufacturing design range and total tolerance ensures marked rating on disk tag does not exceed the MAWP of equipment
  • Withstands full vacuum without vacuum support
  • Wide range of standard and exotic materials available
  • Sizes from 1” (25mm) through 12” (300mm)
  • Burst ratings from 45 psig (3.10 barg) to 3600 psig (248.28 barg)
  • Resists product build-up. The smooth concave side of the disk is exposed to the process media
  • Unique alignment pin design ensures proper disk orientation into FAH Series disk holder
  • 3-dimensional stainless steel tag permanently engraved with complete disk specifications
  • ASME UD, CE (PED), and TÜV compliance available


Sizes: 1″ – 12″ (25 mm – 300 mm)
Burst Pressure Range: 45 psig – 1,500 psig (3.10 barg – 103 barg)
Standard Operational Range: 90%
Vacuum Support Required : Contact ZOOK

FAX Specifications