Safe-Gard (DSC-SGD)

Safe-Gard (DSC-SGD)

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Precision scored, forward acting rupture disc, Safe-Gard

Most technically advanced tension-loaded rupture disc with cross scoring for increased safety

Safe-Gard is a precision scored, tension-loaded forward acting rupture disc solution to suit a wide range of liquid gas and vapour applications. The Safe-Gard rupture disc acts as a reliable solution across a complete line of sizes, materials, burst pressures and process conditions. The single membrane, domed rupture disc combines the versatility of conventional metal discs with the performance benefits of scored technology making this one of the most advanced Forward-acting bursting discs on today’s market.

Forward Acting Disc with superior performance

Accurately scored on the vent-side for precise burst control and increased safety, Safe-Gard benefits from an industry best 5% tolerance with a 90% operating to burst pressure ratio. Its non-fragmenting design makes it ideal for relief valve isolation.

Full vacuum capability

Safe-Gard is a solid metal bursting disc with smooth surface finish. Available in Stainless Steel as standard as well as other materials upon request, with or without a process side liner. Elfab can manufacture Safe-Gard to be used in the harshest of operating conditions while maintaining high levels of corrosion resistance and superior leak tightness. For lower burst pressures Safe-Gard is available with an additional Vacuum support when back pressures or vacuums are present to further enhance the life cycle of the disc.

Cutting costs on rewiring

Safe-Gard is installed into Elfab’s forward-acting, raised face rupture disc holder.



It is fitted with the Flo-Tel actuator as standard to allow for use of Elfab’s unique, reusable, non-invasive burst detection system Flo-Tel™+. As the only ATEX, IECEx or XD approved detection system on the market, Flo-Tel has been offering significant cost savings to customers for almost 20 years. Elfab’s rupture disc holders are available in a wide range of materials and can be manufactured to fit a multitude of industry standard flange specifications.

Leading the industry in advanced quality performance

Elfab pride themselves in offering the highest level of quality and are accredited to a number of leading industry standards. Elfab’s rupture discs can be manufactured to ISO 4126 or ASME VIII dependent on customers’ requirements.

When used in combination Elfab’s rupture discs and detection systems can offer industry leading SIL ratings to offer customers increased safety information. Please contact our technically trained sales engineers for more information.

• Industry leading 5% tolerance, up to 90% operating ratio
• Manufactured to ISO4126 or ASME VIII (UD stamp available)
• Available with protective lining if requested
• Available in a wide range of materials
• Very good life cycle
• Non-fragmenting bursting disc design
• Full vacuum capability
• Suitable for liquid, gas and vapour applications
• Smooth operating surface
• Compatible with reusable detection systems Flo-Tel™ and Flo-Tel™ xd


Contact Elfab about this product
Size Range 15mm to 500mm (1/2” to 20”)
Burst Pressure Range 3.1 barg to 185 barg (51 Psig to 2680 Psig)
Temperature Range See product downloads
Maximum Operating Ratio 90% of minimum burst pressure (86% of nominal burst pressure)
Fragmentation on Burst Non- fragmenting design
Relief Valve Isolation Excellent
Vacuum Service Full Vacuum
Fluid Compatibility Liquid, Gas or Vapour
KR Values 0.68
Torque Sensitive No
Cycle Life Very Good
Material Range Stainless Steel as Standard. Others Available.
Reversal Ratio <1 Fail Safe
Damage Ratio <1 Fail Safe
Leak Tightness Excellent
Performance Tolerance +/- 5% (zero manufacturing design range)
Protective Linings Available
Disc Surface Finish N/A