Zook RA6 Bursting Discs – Reverse Acting Metal

The Zook RA6 Bursting Discs (rupture disks) are designed to cover the majority of medium pressure Bursting Discs (rupture disks) applications. They are specifically designed to be used in the RAH type holder. This is a Pre-Torque holder specifically designed for easier maintenance in your process line. They are a unique holder designed for use with multiple types of ZOOK Reverse-Acting metal rupture discs.

  • Sizes from 1″ (25mm) through 24″ (600mm)

Safety Relief Valve Protection:
When a disc is mounted under a Safety Relief Valve, the working components of the valve are isolated from hostile environments.

Option Liners:
TFE liners are available to provide protection from corrosive media. Note that the maximum temperature ratings for discs supplied with liners is lower than an unlined disc.


  • Designed for Non-fragmentation
  • Scoreless design offers higher cycle life when compared to scored reverse acting discs
  • Standard operating ratio of 90% of the marked rating on disc tag.May be extended to 95% of the minimum burst pressure. (Contact your Zook supplier for operating ratio on pressures below 40 psig)
  • Certified for liquid, gas, or two-phase applications
  • Standard manufacturing ranges of 0%, -5%, and -10% ensures marked rating on disc 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 disc
  • Sizes from 1″ (25mm) through 24″ (600mm)
  • Burst ratings from 12 psi (0.83 barg) to 200 psig (13.97 barg)
  • Resists product build-up. The smooth convex side of the disc is exposed to the process media
  • Damage ratio of 1.0 or less
  • Unique alignment pin design ensures proper disc orientation into RAH holder
  • 3-dimensional stainless steel tag permanently engraved with complete disc specifications
  • ASME UD, CE, and TUV compliance available

Contact our Process Equipment Team:

Noel Bracken – Tel: 083 0891204

Conor Foley- Tel: 021 461 7206