RTC™ Reverse Buckling Rupture Disk

Performance Features

  • Gasketed for installation between flanges
  • Designed for gas service (acceptable for liquid service with a compressible gas/vapor pocket)
  • 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 ≤ 1.5
  • Reversal safety ratio ≤ 1.5
  • Suitable for cycling service
  • Vacuum resistant
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • BS&B proprietary technology

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  • Sizes & Pressures
  • Burst Tolerance
  • Accessories
  • Documentation

Sizes & Pressures

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

Disk Size Inconel® Alloy 600 Monel® Alloy 400 316ss
psig bar psi barg psi barg
in mm min max min max min max min max min max min max
3 80 181 500 12.5 34.5 72.5 500 5 34.5 181 500 12.5 34.5

Burst Tolerance

Marked Burst Pressure Burst Tolerance
2 ≤ 15 psig (0.14 ≤ 1.03 barg) ± 1.5 psig (0.1 barg)
15 < 40 psig (1.03 < 2.8 barg) ± 2.0 psig (0.14 barg)
≥ 40 psig (2.76 barg) ± 5%


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

ITC™ & RTC™ Rupture Disk (Cargo-Gard)
Burst Alert Sensors
Saf-T-Change™ QDR Rupture Disk Replacement System
Detec Saf Alarm System - Burst Disk Monitor


The BS&B Safety Systems RTC™ Reverse Rupture Disk (Bursting Disc) has been developed for the protection of intermodal tank containers from overpressure during storage and transportation of liquefied gases. This bursting disk used in series with a safety relief valve, protects the vessel by reversing at its burst pressure and shearing along cross score lines provides a full pressure relief opening. The RTC™ Reverse Rupture Disk (Bursting Disc) can be used to isolate the relief valve and prevents leakage through the valve.

RTC™ Rupture Disk (Bursting Disc) Material Options

Standard disk materials are Stainless Steel grade 316 & Monel® (Nickel alloy 400). Other materials are available on request. All standard disks are available with 0%, 5%, and 10% manufacturing ranges.



The RTC™ Reverse Rupture Disk (Bursting Disc) has been flow tested with most major world tank valve manufacturers.



The RTC™ Reverse Rupture Disk (Bursting Disc) is easily installed by bolting the disk between the relief valve disk holder and a disk support flange. International codes require that the space between the disk and the safety relief valve is monitored using a pressure gauge to detect a burst or leaking disk.