DKB™ Forward Acting Rupture Disk

Performance Features

  • Smooth surface finish
  • Designed for gas service (acceptable for liquid service with a compressible gas/vapor pocket)
  • Suitable for operating pressure to 80% of the marked burst pressure (85% of the minimum burst pressure) – Overpressure direction
  • Suitable for operating pressure to 75% of the marked burst pressure (80% of the minimum burst pressure) – Vacuum direction
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • BS&B proprietary technology

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

Sizes & Pressures

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

Disk Size Vacuum Relief Vacuum Relief Area Overpressure Relief
in WC mbar psig barg
in mm min max min max in2 cm2 min max min max
2 50 7.5 44 19 110 1.5 9.7 18 170 1.2 12
3 80 6.5 30 16 75 3.6 23.0 16 170 1.1 12
4 100 5.5 30 14 75 5.9 38.3 13 119 0.9 8.2
6 150 5.5 30 14 75 12.3 79.4 13 90 0.9 6.2
8 200 5.5 20 14 50 18.5 119.4 7 55 0.5 3.8

Burst Tolerance

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

Sensors

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.