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Zook URA - Reverse Acting Disks
URA - Reverse Acting Disks

The URA reverse acting rupture disk (bursting disc) covers the majority of rupture disk (bursting disc) applications. Designed to be used in the URAI Holder

Sizes 1" - 30" (25 mm - 762 mm)
Burst Pressure Range 12 psig - 1000 psig (0.83 barg - 68.97 barg)
Operating Ratio Operating ratio up to 95% of the low end of burst tolerance
Vacuum Support Required No
  • Designed for Non-fragmentation
  • Operating ratios up to 95% of the low end of burst tolerance
  • Disk design offers high cycle life
  • Suitable for liquid, gas, or two-phase applications
  • 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
  • Withstands back pressure up to the positive set pressure of the disk
  • Sizes from 1" (25 mm) through 30" (750 mm)
  • Burst ratings from 12 psig (0.83 barg) to 1000 psig (68.97 barg)
  • Resists product build-up. The smooth convex side of the disk is exposed to the process media
  • Damage ratio of 1.0 or less
  • 3-dimensional stainless steel tag permanently engraved with complete disk specifications
  • ASME UD, CE (PED), and TUV compliance available
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