Performance Features

  • When differential pressure of 10 psig (0.69barg) downstream of the rupture disk indicates a burst or leakage, the piston will move to its fully extended position providing a visual warning of the ruptured disk.
  • The electronic Vis-U-Tec™ provides an electrical signal and visual warning of a ruptured disk when used with a BS&B Burst Disk Monitor™, Rupture Disk Manager™ or other suitable electrical monitoring equipment.

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  • Sizes & Pressures
  • Disk Type
  • Safety Heads
  • Accessories
  • Documentation

Sizes & Pressures

Vis-U-Tec™ Free venting disk

Disk Size Burst Pressure
in mm psig barg
1 25 100 6.89
1.5 40 100  6.89
2 50 100 6.89
3 80 200 13.79
4 100 200 13.79
6 150 500 24.13

For larger disk sizes, consult BS&B. The maximum burst pressure is 2,000 psig (137.89barg). Values are based on using a free vented outlet flange with no down stream piping.


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


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

Burst Alert Sensors
Electronic Vis-U-Tec Sensor
Detec Saf Alarm System - Burst Disk Monitor