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SVI Rupture Disk (Bursting Disc) Assembly |
A new
one piece disposable rupture disk (bursting disc) assembly for isolating safety-relief
valves.
For retrofit with fixed piping.
Features
- Solid
reverse buckling S-90 Disk welded into a flange assembly.
- Petals open up along scored (pre-weakened) lines.
- Petals open up to give full flow.
- Available in sizes 1 1/2 " thru 6" including 2 1/2".
- Teflon* Boot available upon request for process side of
SVI.
- Designed specifically to isolate relief valves from the process
media and keep the process fluid from leaking to the atmosphere.
- The
SVI fits between ANSI flanges.
- A
pair of gaskets supplied with each SVI assembly
- Standard disk materials will be Nickel and Inconel. The body and
flange will be 316 Stainless Steel. Consult BS&B for other Disk
Materials.
Benefits
- No
piping changes are required for retrofit of existing relief valve
systems.
- No
knife blades to maintain.
Selection
Data
NOMINAL
PIPE SIZE
(INCHES) |
SVI
SIZE
(INCHES) |
DISK BURST
PRESSURES PSIG |
| NICKEL
200 |
INCONEL
600 |
| MIN |
MAX |
MIN |
MAX |
| 1
1/2 |
1
1/2 |
125 |
400 |
150 |
400 |
| 2 |
2 |
90 |
400 |
110 |
400 |
| 2
1/2 |
1
1/2 |
90 |
400 |
110 |
400 |
| 3 |
3 |
75 |
350 |
90 |
350 |
| 4 |
4 |
60 |
300 |
72 |
300 |
| 6 |
6 |
50 |
250 |
60 |
250 |
Engineering
Information
Minimum
and maximum pressure ratings are applicable at 72° F.
SVI
Flanges are 316 stainless steel or Inconel.
Manufacturing Range:
- Inconel and nickel rupture disks (bursting discs) are available with 5% and 10%
manufacturing range.
- On
these 5% and 10% manufacturing ranges, the total range is placed on the
minus side of the requested pressure rating.
Example:
If a 200
psig SVI is ordered with a 10% manufacturing range, it may be tagged at
any pressure between 200 psig and 180 psig.
Burst
Tolerances:
Burst
tolerances are the maximum variation from the above tagged burst
pressure.
Disks tagged above 40 psig. Burst Tolerance ± 5%.
Disks
tagged 40 psig and below: ± 2 psi.
Recommended maximum temperatures for
each metal are:
Inconel: 900° F.
Nickel: 750° F.
How to
Select
STEP 1:
Select the proper SVI to fit your nominal pipe ID in the chart
above.
NOTE: Fits schedule 80 and lighter piping.
STEP 2: Check
proper material for your application pressures and temperatures
required:
STEP 3: To Order Specify:
- Quantity
- Temperature
- Burst
Pressure
- Teflon*
- Boot
(optional)
- Size
- Disk
- Material
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 Department.
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