Forward Acting Rupture Disk - XN-85™

  • Designed for gas service (acceptable for liquid service with a compressible gas/vapor pocket)
  • Suitable for operating pressure to 85% of the marked burst pressure (90% of the minimum)
  • Designed for non-fragmentation, recommended for Relief Valve isolation
  • Damage safety ratio ≤ 1
  • Suitable for cycling service
  • Vacuum resistant

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Forward Acting Rupture Disk - XN-85™

  • The XN-85 is specially manufactured by forming the disk first and then scoring. 
  • This creates a minimally stressed score pattern offering optimum service life and an extended operating pressure limit of 85% of marked burst pressure or 90% of minimum burst pressure, even under cyclic conditions. Consult us with your particular operating requirements.

Key features

  • Solid metal
  • Precision scored
  • Designed for non-fragmentation
  • Withstands full vacuum without support
  • Operates up to 85% of the disk’s marked pressure or 90% of minimum burst pressure
  • Liquid and gas service (acceptable for liquid service with gas driven liquid conditions; consult factory)
  • Damage safety ratio <1
  • Optimum forward acting disk for pulsating or cycling conditions
  • 0%, -5% and -10% manufacturing design range
  • For use in pretorqued BS&B safety heads type NFI-7RS and NF-7RS or preassembled safety head types NX-7R and NF-7R

Contact us

  • Interested? Please contact BS&B Safety Systems by filling in te contact supplier form.
BS&B Safety Systems Ltd

BS&B Safety Systems Ltd is a global leader in pressure safety management, providing comprehensive overpressure, underpressure, and explosion protection solutions tailored for the expanding hydrogen industry. With over 90 years of experience, BS&B offers specialized rupture disks, flame arresters, and safety relief valves designed for the production, storage, transportation, and usage of hydrogen fuel. The company's solutions ensure critical protection for equipment and personnel across the entire hydrogen value chain.

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