Rupture Disc Leak Detection

A double-disc assembly is well suited for applications involving toxic, highly corrosive, or high-value media. If the process-side rupture disc develops a leak, a pressure gauge installed in the mid-flange can detect the pressure increase, while the secondary rupture disc continues to maintain a sealed system. This allows the primary disc to be replaced during scheduled maintenance rather than under emergency conditions.

Actuated Rapid-Opening Device

A double-disc assembly can also function as a rapid-opening device by pressurising the cavity between the two rupture discs. When the interstitial pressure is released, the assembly achieves full opening within milliseconds. This configuration is commonly used to activate pressure systems or simulate sudden pressure changes during testing.

Elimination of Back Pressure

In double-disc configurations, the secondary rupture disc absorbs system back pressure and isolates the primary disc from pressure fluctuations. This prevents back pressure from affecting the pressure differential across the primary rupture disc, allowing it to burst at its specified rated pressure. The secondary disc can also be selected with a lower burst rating to accommodate maximum expected back pressure during relief events.

Double-disc holder designs are available for HPX, UNISERT, LOTRX, 7I, and RCS holders.