BI-Directional Rupture Discs - The 2-in-1 rupture disc


The bi-directional acting rupture disc opens in one direction for a defined overpressure and in the other direction for vacuum. It is primarily used in storage tanks and processes involving gases or liquids. The rupture disc permits a standard operating ratio of 80 %* in the overpressure direction and 70 %* in the vacuum direction.

* Depending on the specific application

By combining the principles of the KUB® reverse acting rupture disc with the buckling pin and the three-section design of the ODV forward acting rupture disc, we can offer you a REMBE® rupture disc that responds at two different but precisely defined burst pressures.

Your advantages

  • Performs the work of two rupture discs at one installation point.
  • No additional holder required: mounted directly between flanges or angular rings.
  • Suitable for a wide range of applications.


Rupture disc / bursting disc ZW
REMBE® bi-directional rupture disc
Technical data
NPS[in] 2'' 2½'' 3'' 4'' 6'' 8'' 10'' 12''
DN[mm] 50 65 80 100 150 200 250 300
Min. burst pressure at 71 °F
Pressure [barg] 0.50 0.50 0.50 0.30 0.15 0.10 0.10 0.10
Vacuum [barg] -0.40 -0.30 -0.15 -0.025 -0.02 -0.02 -0.02 -0.015
Vent area
In pressure direction [cm2]17253560125245400600
In vacuum direction [cm2]4.56.01120556090110
Standard material combination: stainless steel/PTFE/stainless steel up to max. 462 °F.
Different nominal widths, pressure classes, temperatures, materials and fittings available on request.



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