XB™ Forward Acting Rupture Disk

Performance Features

  • Smooth surface on inlet side; resistant to product accumulation
  • Suitable for operating pressure to 80% of the minimum burst pressure
  • Designed for gas, liquid and multi-phase service
  • Designed for non-fragmentation, recommended for Relief Valve isolation
  • Damage safety ratio ≤ 1
  • Suitable for cycling service
  • Vacuum resistant
  • Available with ASME “UD” (select 0%, -5%, -10% Manufacturing Design Range)
  • Pressure Equipment Directive “CE” marking and/or other International Certifications.
  • BS&B proprietary technology

A 90% operating pressure ratio may apply under static operating conditions; consult factory


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  • Sizes & Pressures
  • Burst Tolerance
  • Safety Heads & Sensors
  • Accessories
  • Documentation

Sizes & Pressures

XB™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)

Disk Size Nickel Alloy 200 Monel® Alloy 400 Inconel® Alloy 600 Hastelloy® Alloy C-276 and 316SS Aluminum
in mm psig barg psig barg psig barg psig barg psig barg
min max min max min max min max min max min max min max min max min max min max
1 25 250 4000 17 276 250 4000 17 276 250 6000 17 414 300 6000 21 414 125 1000 9 69
1.5 40 200 2600 14 179 200 2600 14 179 200 4000 14 276 250 4000 17 276 100 750 7 52
2 50 175 2300 12 159 175 2300 12 159 175 3500 12 241 225 3500 16 241 85 500 6 35
3 80 150 2000 10 138 150 2000 10 138 150 3000 10 207 175 3000 12 207 75 300 5 21
4 100 135 1750 9 121 135 1750 9 121 135 2500 9 172 150 2500 10 172 70 250 5 17
6 150 125 1250 9 86 125 1250 9 86 125 2000 9 138 - - - - - - - -
8 200 110 1100 8 76 110 1100 8 76 110 1750 8 121 - - - - - - - -
10 250 100 1100 7 69 100 1000 7 69 100 1500 7 103 - - - - - - - -
12 300 90 850 6 59 90 850 6 59 90 1250 6 86 - - - - - - - -
14 350 80 650 6 45 - - - - 80 1000 6 69 - - - - - - - -
16 400 75 525 5 36 - - - - 75 800 5 55 - - - - - - - -
18 450 70 400 5 28 - - - - 70 600 5 41 - - - - - - - -
20 500 65 350 5 24 - - - - 60 500 5 35 - - - - - - - -
24 600 60 175 4 12 - - - - 60 250 4 17 - - - - - - - -
Optional liner: A flurocarbon film liner is available as an option on the process side of the XT disk. Fluoropolymer film application range -40°F to 500°F (-40°C to 260°C)

Burst Tolerance

Marked Burst Pressure Burst Tolerance
≤ 40 psig (2.76 barg) ± 2 psig (0.138 barg)
> 40 psig (2.76 barg) ± 5%

Accessories

BS&B supplies many of the Accessories required to safely and conveniently install our overpressure relief devices and complementary products. Through our professional team and global network of sales engineers and procurement personnel, we are able to provide the highest quality accessory products to meet your installation requirements.

Saf-T-Change Quick Disk Replacement (QDR)

After activation, the replacement disk is quickly slid into place. Saving hours of lost production due to blown rupture disks.

Tell-Tale Assemblies & Excess Flow Valves/Gauges

A gauge tap in the outlet flange of the safety head may be considered when the safety head is installed in a vertical position.

Spare Safety Heads & Cap Screws

Jackscrews

When activated, the jackscrews effectively separate the flanges, providing adequate clearance to remove or insert a safety head and external gaskets.

Lifting Lug Eye Bolts

Eye bolts are recommended when weight and/or accessibility is a factor in lifting safety heads.

Baffle Plate

When a safety head is free-vented to atmosphere, a baffle plate may be considered to disperse overpressure and absorb recoil.

Product Literature

Nu-Saf™ Series Scored Forward Acting Rupture Disks
Burst Alert Sensors
Saf-T-Change™ QDR Rupture Disk Replacement System
Detec Saf Alarm System - Burst Disk Monitor