RB-7R™ and RB-7RS™ Safety Heads (Holders)

Pre-Assembled Safety Head with Knife Blades


Performance Features

  • Insert type safety head that fits inside the bolt circle of companion flanges to allow for easy installation and removal
  • Pre-Assembled cost-effective solution
  • Flow arrows on the side of the safety head indicate correct directional installation with process flow
  • Proprietary ‘bite seal’ on flat seating surface to optimize sealing between rupture disk and safety head process side allowing leak tightness of 10^-6cc/s He or greater
  • Can be equipped with pressure tapping in either inlet or outlet to allow installation of monitoring devices and sensors
  • For use with flanged piping connections; Raised face, Ring joint and tongue and groove flange facings. Designed for multi flange ratings and piping standards
  • The rupture disk dome fully protected within safety head inlet to avoid damage when installed into piping system
  • Disk activation achieved by knife blade technology
  • Available in Torque resistant version, specify RB-7R-TR or RB-7RS-TR

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  • Sizes & Pressures
  • Disks & Sensors
  • Materials & Option
  • Accessories
  • Documentation

Sizes & Pressures

RB-7R Safety Head Specifications
Nominal Pipe and Disk Size Assembly Height Dimensions Outside Diameter
RB-7R RB-7FF RB-7FS Assy RB-7R Assy RB-7FF, RB-7FS
in mm in mm in mm in mm in mm in mm
1 25 1.5 38 1.6 41 1.5 38 2.5 64 4.3 108
1.5 40 1.6 40 1.8 46 1.6 40 3.3 83 5.0 127
2 50 1.7 43 1.9 48 1.7 43 4.0 102 6.0 152
3 80 2.1 54 2.3 59 2.1 54 5.3 133 7.5 191
4 100 2.7 68 2.8 70 2.8 70 6.8 172 9.0 229
6 150 3.4 87 3.6 90 3.4 87 8.6 219 11.0 279
8 200 4.4 113 4.4 113 4.4 113 10.9 278 13.5 343
10 250 5.1 130 5.1 130 5.1 130 13.3 337 16 406
12 300 5.9 149 5.9 149 5.7 149 16 406 19 483
14 350 6.4 164 6.4 164 - - 17.6 448 21 533

* Displayed here is a particle table. Click here to see complete table.

Standard Materials

316 stainless steel and carbon steel.

Also available Monel® alloy 400, Inconel® alloy 600, Hastelloy® alloy C and C-276, aluminum, and titanium.

Torque Resistant Safety Head Option

The Type TR™ Series torque resistant safety head option offers the identical performance and flow characteristics valued from standard BS&B safety heads. The only difference – the TR Series Safety Heads are designed with a wider seating surface to be used with metal spiral wound gaskets at the flange. This distinct safety feature protects rupture disks from situations where plant personnel may overtorque rupture disks within piping systems.

Because of the wider seating surface of the TR Series Safety Head, the load is distributed over a much broader area reducing the influence of excessive torque transmitted to the disk.

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

RB-90™ Rupture Disk Brochure
Burst Alert Sensors Brochure

Installations

RB-90™ Rupture Disk (Bursting Disc) and RB-7R RB-7FF RB-7FS Safety Heads Installation Instructions
Burst Alert Sensor Installation Instruction