HiLo-S™ Sanitary Two Way Acting Rupture Disks

Higher Temperature Ultra Low Pressure Two Way Acting Rupture Disk


Performance Features

  • Unique, two-way acting HiLo disk prevents vessel damage from overpressure or implosion under vacuum
  • Vacuum pressure relief through reverse buckling of the disk (lo-side)
  • Positive pressure relief through forward acting burst of the disk (hi-side)
  • Available in sizes 2 to 12 inches (50 to 300 mm)
  • Temperature capability up to 400°F (200°C)
  • Set pressures starting at 5 inch water column and up (12.5 mBar)
  • Gas service (acceptable for liquid service with a compressible gas / vapor pocket between the liquid and disk. Minimum 20 pipe diameter gas volume on process and vent side of disk)
  • TSE-BSE Free
  • BS&B proprietary technology

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

Sizes & Pressures

Fluoropolymer Seal Burst Pressure Range from 50°F to 150°F (10°C to 65°C)
Disk Size Low Pressure Direction Burst Pressure High Pressure Direction Burst Pressure
WC inches mbar psi bar
in mm min max min max min max min max
2  50 10 51 25 127 11 28 0.8 1.9
3 80 6 36 15 90 8 28 0.6 1.9
4 100 5 28 12.5 70 7 28 0.5 1.9
6 150 6 19 15 47 4 22 0.3 1.5
8 200 5 15 12.5 37 3 22 0.2 1.5
Available with other pressure/temperature combinations. Contact BS&B.

Chemfilm® DF2919 Seal Burst Pressure Range from 50°F to 400°F (10°C to 204°C)
Disk Size Low Pressure Direction Burst Pressure High Pressure Direction Burst Pressure
WC inches mbar psi bar
in mm min max min max min max min max
2  50 18 300 45 747 39 75 2.7 5.2
3 80 7 300 17.5 747 28 75 1.9 5.2
4 100 5 300 12.5 747 22 75 1.5 5.2
6 150 6 300 15 747 15 75 1 5.2
8 200 5 300 12.5 747 12 75 0.08 5.2
For some combinations of size, temperature and burst pressures: Temperature range is -100ºF to 350ºF (-73C to 176ºC). Chemfilm is a registered trademark of Saint-Gobain Performance Plastics Corporation.

Burst Tolerance

Hi direction burst tolerance
Specified Burst Pressure Burst Tolerance
psig barg
> 4 to 9 > 0.3 to 0.6 ± 20%
> 9 to 13 > 0.6 to 0.9 ± 15%
> 13 to 18 > 0.9 to 1.2 ± 10%
>18 to 25 > 1.2 to 1.7 ± 7%
> 25 > 1.7 ± 5psig

Lo direction and RLB disk burst tolerance
Specified Burst Pressure Burst Tolerance
inch WG mbar
< 8 < 2.76 ± 1.5 in WG (3.8mbar)
> 8 > 2.76 ± 20%

Hi direction manufacturing design range
Specified Burst Pressure Burst Tolerance
psig barg
≤ 40 ≤ 2.76 ± 2psig (0.1bar)
> 40 > 2.76 - 10%

Product Literature

Burst Alert Sensors Brochure

Installations

Burst Alert Leak Dectector Installation Instruction
Burst Alert Sensor Installation Instruction
Sanitary Alert Sensor Installation Instructions