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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
3/8" 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.
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