Performance Features

  • Reusable sensor, external to process
  • One-time electrical installation
  • Zero leakage; no process contact
  • Zero leakage; no process contact
  • Normally closed circuit
  • Immediate open circuit upon disk burst
  • Unaffected by back pressure
  • Magnetic Activation. Activation assembly installed at disk outlet
  • Designed for use with BS&B Burst Disk Monitor, BS&B SmartDisk® Wireless Monitoring System, BS&B Rupture Disk Manager®, and other appropriate electrical systems.
  • Use with Rupture Disk sizes 1” (25mm) to 8” (200mm)

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  • Sizes & Pressures
  • Disks & Safety Heads
  • Accessories
  • Documentation

Sizes & Pressures

Size ASME / ANSI EN JIS SPR-7R and SR-7R Safety Head Thickness
Face-to- Face Dimensions
in mm in mm
1 25 150, 300, 600 10, 16, 25, 40 10, 16, 20, 30, 40 1.776 45.1
1.5 40 150, 300, 600 10, 16, 25, 40 10, 16, 20, 30, 40 1.933 49.1
2 50 150, 300, 600 10, 16, 25, 40 10, 16, 20, 30, 40 1.933 49.1
3 80 150, 300, 600 10, 16, 25, 40 16, 20, 30, 40 1.933 49.1
4 100 150, 300, 600 10, 16, 25, 40 16, 20, 30, 40 2.055 52.2
6 150 150, 300 10, 16, 25, 40 10, 16, 20, 30, 40 2.524 64.1
8 200 150, 300 10, 16, 25, 40 16, 30, 40 3.399 86.33
Note: these dimensions do not allow for the rupture disk which can add up to 1/8” (3mm) or the companion flange gaskets.

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

Burst Alert Sensors
Detec Saf Alarm System - Burst Disk Monitor

Burst Alert® Magnetic Sensor SPR-7R and SR-7R Safety Heads

  1. SPR-7R Safety Head extended outlet contains petals after activation, for easy removal of safety head from flanges after disk burst. Petals are enclosed and will not protrude past safety head.
  2. SR-7R Safety head Outlet
  3. RBS Switch
  4. BAML: Burst Alert Magnetic Low activation assembly for low pressure LPS disk
  5. BAM: Burst Alert Magnetic activation assembly for all other approved disk types
  6. SPR-7R and SR-7R Safety Head inlet
  7. Rupture Disk
  8. Asymmetric locating pins; correctly position Rupture Disk and BAM or BAML within SR-7R Safety Head
  9. Pre-assembly screws; retains Safety Head, Rupture Disk and BAM/BAML components loosely in position ready for installation