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CMC Technologies supplies FDC rupture disc holders for flange assembly applications, including Pre Assembly Type, Semi Pre Torque Type, and Pre Torque Type designs. These designs are also known as Safety Heads.
Rupture Disc Holders for Flange Assemblies in Australia
FDC rupture disc holders are available for flange assemblies in Australia and are offered in Pre Assembly Type, Semi Pretorque Type, and Pretorque Type designs aslo known as safety heads.
FDC rupture disc holders are designed for process applications where installation, inspection, and cleaning are important. The available holder designs support different flange facings, assembly types, and rupture disc applications.
Rupture Holder Types and Main Features
Pre Assembly Type
- Pre Assembly Type holder
- Standard FDC holder
- Tightening: stud bolt / nut fastening force
- Simple design
- Low cost
Semi Pre Torque Type
- Semi Pre Torque Type holder
- Standard FDC holder
- Tightening: FDC standard
- Self tightening
- Reasonable cost
Pre Torque Type
- Pre Torque Type holder
- Standard FDC holder
- Tightening: FDC standard
- Self tightening
- High cost
Rupture Disc Holders for Easy Inspection Without Disc Replacement
The pretorque and semi pretorque designs allow the customer to apply torque in the workshop via the cap screws on the holder. The holder can then be installed on the process using only the sealing torque on the flanges.
When it is time to inspect the rupture disc assembly, the customer can use the pretorque or semi pretorque design to:
- release the sealing torque on the flanges
- remove the sealing gaskets
- remove the entire assembly
- inspect and clean it
- reinstall it without replacing the bursting disc
If this is done with an insert holder, the disc must be replaced because the disc will not reseal if the sealing torque on the flanges is released.
FDC Holder Design Benefits
Pre-Torqued Holders
FDC pre-torque type holders allow the assembly to be removed for inspection and reinstallation without affecting seal integrity, using the built-in cap screws.
The FS(PT) full faced design has additional bolt holes corresponding to the flanges, which makes it easier to secure and install.
The FS(SPT) design makes removal of the assembly easier.
A pre-torqued holder also has pre-torque bolts or guiding holes, which allow for easier installation and better aligned seating. One disc is also pre-assembled into the holder.
Flat Seat Insert Type Holder
A Flat Seat Insert Type Holder has also been known as it is the most cost effective option from FDC.
This type is suitable when the main requirement is a cost-effective rupture disc holder solution.
Holder Types Vs Applicable Rupture Discs
FDC rupture disc holders are matched to specific rupture disc types:
| Holder Type | Applicable Rupture Disc |
|---|---|
| FS Type | KSRRK, KSRSR, KSRSF, KSRST, KSRRCH(D) |
| KS Type | KSRR |
| H Type | KSROH(D) |
| SS Type | KSRC, KSRCT |
| BFS Type | KSRBKH |
Size Range
FDC rupture disc holders are available in a wide size range:
- 1/2″ to 24″
- DN15 to DN600