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Gas application

The DBB-SAVER was originally designed to deal with problems with leaking valves in gas applications. Hazardous conditions due to leaking valves can now be 100% mitigated when the DBB-SAVER is applied, e.g. with explosive and/or toxic gasses.

The exhaust of the DBB-SAVER can vent the gas to the same place as a conventional bleed (e.g. to atmosphere, or to a flare).

Another advantage with the DBB-SAVER, besides mitigation of the leakage, is that the bleed is monitored automaticly and continuously. As opposed to a conventional bleed, which is monitored by an operator, subjectively determining the leakage, perhaps once per shift.

Even in case the bleed is led to a safe location which makes monitoring of the leak rate by an operator difficult or impossible, (e.g. the top of a building, a flare, or outside the topsides in an offshore application), the DBB-SAVER will not be impaired by the location of the vent outlet. It will maintain its automatic monitoring function reliably, indepentent of the vent outlet location.

The standard product range is able to handle gas with a temperature range of -20 / +60 degrees  Centigrade, but higher (steam) or lower (even cryogenic) temperatures  are possible on request.

Material selection is based on the specification of the gas composition. The DBB-SAVER can also handle wet gas.

Explosion safe versions available.

Isolation valves

In case the DBB-SAVER is used on a system containing gas, the isolation configuration can be a classical Double Block & Bleed (DB&B – existing of 2 in line valves and a smaller bleed valve) or Single Valve (SV).

With most common valve types used in the industry (e.g. a ball valve, gate valve, plug valve, etc.) the valve contains two seats.  These can be active seats, mimicking a classical DB&B configuration, or passive (self relieving) seats, usually designed to make bi-directional flow possible.

DB&B provides a higher degree of safety compared to any SV configuration.
And a SV with double active seats provides a higher degree of safety compared to passive seats.

When connecting the DBB-SAVER to the bleed or drain connection of a SV body cavity, the safety level that a SV can provide is increased significantly.

Safe working behind leaking valves becomes possible when deploying a DBB-SAVER. Even if the isolation is provided by only a single valve.

Liquid application

Liquified gas application
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