GFR-S™ Sanitary Reverse Rupture Disks

Performance Features

  • Superior surface finish
  • Recommended for CIP / SIP service
  • 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
  • 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
  • Multiple design options available
    • Integral or stand-alone sensor
    • Novaseptic compatibility to minimize dead leg
    • Welded design for robust leak free operation
    • Asymmetric gasket/outlet to ensure correct orientation
    • Symmetric gasket design for use with standard ASME and ISO sanitary connections

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

Sizes & Pressures

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

Disk Size Relief Area Burst Pressure
in mm in2 mm2 psig barg
min max min max
1 25 0.2 129 40 300 2.7 21
1.5 40 0.8 510 13.5 300 0.9 21
2 50 1.8 1142 11.5 275 0.8 19
3 80 4.9 3167 11.5 160 0.5 11
* Other materials available upon request

Burst Tolerance

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


Integral Burst Disk Option Available


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

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

GFR Series Disk Types

Disk Type Connection Integral Sensor
GFR-S GR-C Outlet No
GFR-SS GR-C Outlet Yes
GFR-SM Standard* No
GFR-SMS Standard* Yes
* Standard assumes Tri-Clover® or equivalent sanitary ferrule connections. Tri-Clover® is a registered trademark of Alfa Lavel Corporate AB.