AVB-ST™ Sanitary Rupture Disks

Atmospheric Vacuum Breaker

AVB-ST™ Sanitary Rupture Disks

Performance Features

  • Designed for gas, liquid and multi-phase service
  • Suitable for operating pressure to 70% of the marked burst pressure (75% of the minimum burst pressure) – Overpressure direction
  • Suitable for operating pressure to 55% of the marked burst pressure (60% of the minimum burst pressure) – Vacuum direction
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • BS&B proprietary technology
  • Suitable for use in a flanged or sanitary holder

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

Sizes & Pressures

AVB™ Positive Pressure Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)
Disk Size Burst Pressure Relief Area
psig barg
in mm min max min max
3 80 5  100 0.35 6.89 Full
4 100 5 100 0.35 6.89 Full
6 150 3 85 0.21 5.86 Full
8 200 3 85 0.21 4.48 Full

Note: Burst range includes all tolerances. No additional manufacturing design range

AVB™ Vacuum Relief Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)
Disk Size Burst Pressure Burst Range Relief Area
psig barg
in mm min max min max psig barg in2 cm2
3 80 3  10 0.2 0.7 ± 0.5 ± 0.4 2.0 13.1
4 100 2 10 0.1 0.7 ± 0.5 ± 0.4 3.6 23.1
6 150 1.5 6 0.1 0.4 ± 0.3 ± 0.02 5.9 38.3
8 200 1 6 0.1 0.4 ± 0.3 ± 0.02 9.3 59.7
Note: Burst range includes all tolerances. No additional manufacturing design range

Burst Tolerance

Marked Burst Pressure Burst Tolerance
3 to 5 psig (0.2 to 0.4 barg) ± 25 psig
6 to 8 psig (0.4 to 0.6 barg) ± 20 psig
9 to 12 psig (0.6 to 0.8 barg) ± 15 psig
13 to 17 psig (0.9 to 1.2 barg) ± 10 psig
18 to 25 psig (1.2 to 1.7 barg) ± 7 psig
26+ psig (1.8+ barg) ± 5 psig

Safety Heads

VB-C Safety Head
VB-C Safety Head

Sensors

KBA-S™

Product Literature

Bio-Saf Series Rupture Disk Brochure

Installations

Sanitary Alert Sensor Installation Instructions