Conventional Domed (DSC-CDD)

Conventional Domed (DSC-CDD)

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Conventional Domed Forward Acting Rupture Disc

Forward Acting rupture disc solution for high burst pressure applications

Conventional Domed is a versatile, solid metal domed disc which can be used to suit a wide range of burst pressures and process conditions. The Conventional Domed (CDD) is suitable for very high burst pressure applications, available in a wide range of materials and sizes.

Widest burst pressure range of any product type

The conventional domed disc offers the widest size and burst pressure range of any Elfab rupture disc product type. The size range of this product is available in sizes up to 800mm with a pressure range from 0.5barg to 1400barg. It is available in various materials from Stainless Steel as standard, to nickel and Inconel as well as others available on request meaning this rupture disc is suitable for a vast range of burst pressure applications.

Single design for full vacuum capability

When exposed to vacuum, the Conventional Domed bursting disc can be manufactured with back pressure support to withstand the harshest of operating conditions. No vacuum support is required above burst pressures of 30barg. With its solid metal construction and smooth surface finish, this forward acting rupture disc benefits from a 5% tolerance with an 85% operating to burst pressure ratio making it a reliable solution for various applications.

Cutting costs on rewiring

Conventional Domed is installed into Elfab’s forward-acting, raised face rupture disc holder and fitted with Flo-Tel™+ as standard. Flo-Tel is the only ATEX, IECEx or XD approved detection on the market and it’s been offering significant cost savings to customers for almost 20 years.



When it comes to harsh operating conditions, Elfab can supply a wide range of rupture disc holders, manufactured to fit a multitude of industry standard flange specifications.

Leading the industry in advanced quality performance

The Conventional Domed rupture disc has been offering reliable burst protection for several decades. Elfab is an industry leader in the manufacture of technically advanced rupture disc solutions and maybe able to offer a more superior performance product as a direct replacement to this design, please contact our technically trained sales engineers for more information.

Elfab’s rupture discs can be manufactured to ISO 4126 or ASME VIII dependent on customers’ requirements.

• Industry leading 5% tolerance, up to 85% operating ratio
• Manufactured to ISO4126 or ASME VIII (UD stamp available)
• Available with protective linings if requested
• Excellent life cycle
• May fragment on burst
• No vacuum support is required above burst pressures of 30 barg
• Suitable for liquid, gas and vapour applications
• Compatible with reusable detection systems Flo-Tel™ and Flo-Tel™ xd




Contact Elfab about this product
Size Range 3mm to 800mm (1/8” to 32”)
Burst Pressure Range 0.5 barg to 1400 barg (7 Psig to 20300 Psig)
Temperature Range See product downloads
Maximum Operating Ratio 85% of minimum burst pressure (81% of nominal burst pressure)
Fragmentation on Burst May Fragment
Relief Valve Isolation Not Recommended
Vacuum Service No support required above burst pressure of 30 barg
Fluid Compatibility Liquid, Gas or Vapour
KR Values 1.4 (no support)
Torque Sensitive No
Cycle Life Excellent
Material Range Stainless Steel as Standard. Others Available
Reversal Ratio <1 (Fail Safe) Dependent on Back Pressure Support
Damage Ratio <1 (Fail Safe)
Leak Tightness Excellent
Performance Tolerance +/- 5% (zero manufacturing design range)
Protective Linings Available
Disc Surface Finish N/A