CSI™ - Sure-Saf™

Fail-Safe Reverse Buckling Disk
CSI™ - Sure-Saf™

Performance Features

  • Designed for gas, liquid and multi-phase service
  • Suitable for operating pressure to 90% of the marked burst pressure (95% of the minimum)
  • Designed for non-fragmentation, recommended for Relief Valve isolation
  • Damage safety ratio ≤ 1
  • Reversal 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

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

Sizes & Pressures

CSI™ 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 316SS
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 70 500 5 34.47 70 500 5 34.47 80 500 6 34.47 90 500 6 34.47 90 500 6 34.47
1.5 40 50 500 3 34.47 50 500 3 34.47 50 500 3 34.47 80 500 6 34.47 80 500 6 34.47
2 50 50 500 3 34.47 50 500 3 34.47 50 500 3 34.47 75 500 5 34.47 75 500 5 34.47
3 80 45 500 3 34.47 45 500 3 34.47 45 500 3 34.47 70 500 5 34.47 70 500 5 34.47
4 100 45 500 3 34.47 45 500 3 34.47 45 500 3 34.47 65 500 4 34.47 65 500 4 34.47
6 150 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47
8 200 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47 30 500 2 34.47
Note: Consult BS&B for applications where the disk may be rated with a coincident specified temperature below the maximum process temperature to which the disk may be exposed.

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

Sure-Saf Series
Burst Alert Sensors
Saf-T-Change™ QDR Rupture Disk Replacement System
Detec Saf Alarm System - Burst Disk Monitor

Installations

Types CSI™ and CSR™ Rupture Disks CSR-7RS™ Safety Head
Burst Alert Leak Dectector Installation Instruction
Burst Alert Sensor Installation Instruction