AV™ - Nu-Saf™

Performance Features

  • Same burst pressure in both directions
  • Suitable for operating pressure to 60% of the minimum burst pressure
  • Damage safety ratio ≤ 1
  • Vacuum resistant with additional vacuum support
  • Optional fluoropolymer liner/coating
  • Available with ASME “UD” (0%, Manufacturing Design Range)
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • BS&B proprietary technology
* Type AVV rupture disk has a non-opening vacuum support which will reduce the minimum net flow area. Consult BS&B for flow area information based on size and burst pressure.

Request a Quote

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

Sizes & Pressures

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

Disk Size Stainless Steel
in mm psig barg
min max min max
1 25 10 150 0.7 10.3
1.5 40 7 150 0.5 10.3
2 50 5 150 0.3 10.3
3 80 4 150 0.3 10.3
4 100 2 150 0.1 10.3
6 150 1 100 0.1 6.7
8 200 1 100 0.1 6.7
10 250 0.6 60 0.04 4.1
12 300 0.6 60 0.04 4.1
16 400 0.6 60 0.04 4.1
18 450 0.5 60 0.03 4.1
20 500 0.5 60 0.03 4.1
24 600 0.5 60 0.03 4.1
28 700 0.5 60 0.03 4.1
30 750 0.5 60 0.03 4.1
32 800 0.35 40 0.02 2.8
36 900 0.25 40 0.02 2.8
40 1000 0.25 40 0.02 2.8
44 1100 0.25 40 0.02 2.8
48 1200 0.25 40 0.02 2.8
For sizes larger than 48” (1200mm) contact BS&B for burst pressures. Note: Type AV disks are burst tested by BS&B using ASME/ANSI/B16-s class 150 weld neck flange dimensions. Contact BS&B for alternatives.

Burst Tolerance

Marked Burst Pressure Burst Tolerance
< 5 psig (0.345 barg) ± 1 psig (0.069 barg)
5 psig < 20 psig (0.345 barg < 1.38 barg) ± 1.5 psig (0.103 barg)
20 psig < 40 psig (1.38 barg < 2.76 barg) ± 2 psig (0.138 barg)
> 40 psig (2.76 barg) ± 5%

Sensors

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

AV™ Rupture Disk Atmospheric Vessels
Burst Alert Sensors
Saf-T-Change™ QDR Rupture Disk Replacement System
Detec Saf Alarm System - Burst Disk Monitor