FRB™ Frustum Rupture Disk

Performance Features

  • Standard sizes: 1/8, 1/4, 3/8 , 1/2, and 3/4 inch (3, 6, 9, 12 and 19 mm)
  • Pressure ratings from 20 to 900 psig (1.4 to 62 barg)
  • Full opening along circular score
  • Solid metal, reverse buckling technology
  • Standard materials: 316ss, nickel 200, Inconel® 600 and aluminum
Note: Most FRB disks are supplied as an assembly, often with screw threaded connections

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  • Sizes & Pressures
  • Burst Tolerance
  • Accessories
  • Documentation

Sizes & Pressures

FRB™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C) for gas or vapor service
Disk Size Nickel Alloy 200 Inconel® Alloy 600 316ss Aluminum
in mm psig barg psig barg psig barg psig barg
min max min max min max min max min max min max min max min max
0.125 3 200 500 13.79 34.47 250 850 17.24 58.61 300 900 20.68 62.05 125 400 8.62 27.58
0.25 6 100 450 6.89 31.03 150 800 10.34 55.16 150 850 10.34 58.61 60 300 4.14 20.68
0.375 9 50 400 3.45 27.58 60 750 4.14 51.71 60 800 4.14 55.16 35 250 2.41 17.24
0.5 13 35 200 2.41 13.79 45 650 3.10 44.82 45 675 3.10 46.54 25 200 1.72 13.79
0.75 19 30 120 2.07 8.27 35 390 2.41 26.89 40 405 2.76 27.92 20 120 1.38 8.27

FRB™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C) for liquid service
Disk Size Nickel Alloy 200 Inconel® Alloy 600 316ss Aluminum
in mm psig barg psig barg psig barg psig barg
min max min max min max min max min max min max min max min max
0.125 3 Consult factory
0.25 6 250 450 17.24 31.03 250 800 17.24 55.16 250 850 17.24 58.61 60 300 4.14 20.68
0.375 9 150 400 10.34 27.58 150 750 10.34 51.71 150 800 10.34 55.16 35 250 2.41 17.24
0.5 13 80 200 5.52 13.79 80 650 5.52 44.82 80 675 5.52 46.54 25 200 1.72 13.79
0.75 19 Consult factory

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

FRB™ – Frustum Reverse Buckling Rupture Disks
Custom Engineered Products
Threaded Rupture Disk Assemblies
Burst Alert Sensors
Detec Saf Alarm System - Burst Disk Monitor