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opens in one ­direction at defined overpressure + in the other direction at vacuum.


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.
The ZW can be supplied with an integrated SNR signalling unit suitable for use in hazardous areas. When the disc ruptures in either the overpressure or vacuum direction, the SNR gives an open circuit signal to advise of an activation. 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 rupture disc that responds at two different but precisely defined burst pressures.
REMBE® ZW with Accessoires

signaling devices

Automated processes use intelligent signaling systems to keep you informed at all times about the status of your entire plant and any faults that may arise. You can even install signaling devices for rupture discs that have already been installed.


For all process conditions. For example, for high temperature or sterile requirements.
  • 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.
  • chemical industry
  • oil and gas separation and treatment
  • petrochemical plants
  • power plants
  • process vessels
  • refineries
  • silo
  • brewery
  • chemical- petrochemical
  • food
  • oil and gas industry
  • pharmaceutical industry
Process mediumSuitability
Gas | Steam
Liquid with gas cushion
Two phase flow
Hygienic applications
✓✓ recommended
✓ suitable
Click and drag image to view.
Scan the QR code with your iOS camera* to see an AR preview of the product.
ZW AR Viewer Ru
The dimensions shown may differ from those of the actual product.
* Requires iOS 13, iPadOS 13, ARCore 1.9 or higher.
Dietmar Wiedemeier, responsible for bidirectional rupture discs
"Almost every bidirectional rupture disc that has left our premises over the last 20 years was built by me. What most customers find so convincing is that it has a single installation point and combines the functions of two rupture discs. Perfect, isn’t it?"
Any Questions?
We would be happy to show you solutions tailored to your process that limit the effects of an explosion to a harmless level and ensure that production can be resumed quickly after an explosion event.
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© REMBE® Inc.