Rupture Disk

MRB High Pressure
Rupture Disk (Bursting Disc)

Highlights

For high pressure applications. MRB (The Machined Reverse Buckling Rupture Disk (Bursting Disc)) offers a one-piece design including both disk and housing. It is a uniform metal slug machined to a thin diaphragm in the center and then formed. When the reversal pressure is reached the disk snaps through and shears out completely at the disk/housing junction

Features

  • Sizes ⅜" to 4"
  • Pressure Ratings available up to 70,000 psig
  • Opens full bore with no flow restrictions
  • Design assures long service life with a very high resistance to fatigue
  • Non-torque sensitive
  • Maximum Operating Pressure to 90% of disk pressure rating
  • No knife blades required for opening
  • Use in gas or liquid service
  • Designed to adapt to customer's unique application

Sample MRB Installations

Selection Data

Specifications for Standard MRB Rupture Disks

Min/Max Pressure Ratings at 72° F. (psid)

Nominal Size (Inches) A (Inches) B (Inches) C (Inches)
3/8 .965 .375 .375
1/2 1.000 .375 .500
5/8 1.250 .375 .625
3/4 1.500 .500 .750
1 2.000 .625 1.000
1-1/2 2.750 1.000 1.500
2 3.500 1.250 2.000
3 4.750 1.750 3.000
4 6.000 2.500 4.000

*Consult factory for availability of other materials or pressure ratings.

Engineering Information

Minimum and maximum pressure ratings are applicable at 72° F.

Manufacturing Range:
Available with either 2%, 5% or 10% manufacturing range. The total range is placed on the minus side of the requested rating.

Example:
If a 20,000 psig MRB is ordered with a 10% manufacturing range, it may be tagged at any pressure between 20,000 psig and 18,000 psig.

Burst Tolerances: ± 5%
Tolerances are the maximum variation from the above tagged burst pressure.
Recommended maximum temperatures for each metal are:

Hastelloy C-276 900° F.
Inc/Alloy 600 900° F.
304L SS 900° F.

Burst Pressure Capability

Disk Size (Inches) Disk Material*
Hastelloy C-276 Inconel/Alloy 600 304 L SS
Min Max Min Max Min Max
3/8 4300 49,000 4500 55,000 6000 70,000
1/2 3800 48,000 4000 54,000 4900 70,000
5/8 3500 46,000 3500 52,000 4400 66,000
3/4 2900 44,000 3100 49,000 3900 62,000
1 2500 39,000 2500 43,000 3400 56,000
1-1/2 2100 31,000 1900 35,000 2800 45,000
2 1900 25,000 1800 29,000 2500 37,000
3 1600 18,000 1500 21,000 2200 27,000
4 1500 14,000 1500 16,000 2000 21,000

*Consult factory for availability of other materials or pressure ratings.

STANDARD DESIGN

NOTE: Products, specifications, and all data in this literature are subject to change without notice. Questions regarding product selection and specifications for specific applications should be directed to BS&B, Attn: Customer Service Dept.


  
Further Information
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