RE™ - Saf-t-Graf™

Performance Features

  • Designed for gas, liquid and multi-phase service
  • Suitable for operating pressure to 80% of the marked burst pressure (85% of the minimum)
  • Vacuum resistant (additional vacuum support required for some burst pressures)
  • Available with ASME “UD” (select 0% Manufacturing Design Range)
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • Optional fluoropolymer liner/coating
  • Optional HTA™ High Temperature Assembly
  • BS&B proprietary technology

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

Sizes & Pressures

RE™, REL™, REV™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)

Disk Size Burst Pressure Total Assembly Thickness ‘A’
psig barg 316ss Graphite
in mm min max min max in mm in mm
1 25 10 435 0.7 30 1.1 28 1.1 28
1.5 40 7 290 0.5 20 1.1 28 1.2 31
2 50 3 217 0.2 15 1.1 28 1.3 32
2.5 65 3 174 0.2 12 1.2 30 1.5 37
3 80 2.2 145 0.2 10 1.4 35 1.7 42
4 100 2.2 116 0.2 8 1.5 37 1.9 47
5 125 1.5 87 0.1 6 1.6 40 1.9 47
6 150 1 72 0.1 5 1.7 44 1.9 47
8 200 1 58 0.1 4 2 50 2.4 61
10 250 1 43 0.1 3 2 53 2.7 68
12 300 1 36 0.1 3 2.4 61 3 76
14 350 1 29 0.1 2 2.5 63 3.2 80
16 400 1 21 0.1 2 2.8 70 3.3 83
18 450 1 21 0.1 2 3 77 3.6 92
20 500 1 17 0.1 1 3.5 88 4.1 105
24 600 1 17 0.1 1 3.7 93 4.4 111
For proper sizing, see the BS&B website or contact BS&B for appropriate KR values

Burst Tolerance

Marked Burst Pressure Burst Tolerance
< 1 psig (0.07 barg) -0/+0.75 psig (0/0.05 barg)
1 - 15 psig (0.07 barg < 1.03 barg) ± 0.75 psig (0.05 barg)
> 15 psig (1.03 barg) ± 5%
For sizing, see the BS&B website or contact BS&B for appropriate KR

Example: If a Saf-T-Graf RE type disk is ordered with a 29 psig (2 bar) burst pressure, it will burst between 27.5 psig (1.9 bar) and 30.5 psig (2.1 bar). For reduced tolerances contact BS&B.

Armored Option

An armoring ring is recommended for all graphite disks for added safety eliminating premature bursting of the disk due to uneven or excessive torquing of the pipe flange studs. Armoring minimizes the probability of damage in transit and during installation. Carbon steel armor is standard with stainless steel offered as an option. Armoring is standard in the following sizes and with burst pressures in excess of the following:

Size Burst Pressure
in mm psig barg
1 25 130 8.9
1.5 40 115 7.9
2 50 100 6.9
2.5 65 93 6.4
3 80 85 5.9
4 100 70 4.8
5 125 60 4.1
6 150 50 3.4
8 200 40 2.8
10 250 25 2.1
12-24 300-600 25 1.7

Product Literature

Saf-T-Graf™ Graphite Disks
Burst Alert Sensors
Detec Saf Alarm System - Burst Disk Monitor