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DBB-SAVER Working Principle

The working principle of the DBB-SAVER makes leakage to the safe working area physically impossible. It works on a classical Double Block & Bleed configuration but also can be deployed on most Single Valve Isolations.

The bleed volume can either be the section between:

  1. both block valves in a classical DB&B configuration, or

  2. both seats in the body of a single valve, e.g. most ball, plug or gate valves, or

  3. any other combination of two valves in series, e.g. a block valve and (under conditions) a control valve without traditional isolation credits. Or for example a combination of a stopple and mud plugs during pipeline repair.


We are not greasing or sealing and do not affect the condition or the performance of the valve whatsoever. It is a temporary solution only for the duration of the downstream maintenance works when the valves are locked closed.

DBB vac.png

Areas of application

Gasses | Liquified Gasses | Liquids | On- & Offshore


Fully automated design | Fail safe functionality | Local visual and audible alarm | Remote wireless online alarm functionality


A. Standard Tool Capacity: Regular capacity - 1.8L/min | Mid capacity - 2.5 L/min | High capacity - 6.8 L/min

B. Capacity rated to customers request

Design Approvals

PED (Pressure Equipment Directive) or B16.3 and ASME VIII Div.1

Rated for 10 barg / Class #150

Certifications / Licences

  • ATEX certified: EX II 2G Ex h IIB+H1 T4 Gb (For ATEX Zone 1 environment)

  • Explosion safe, North American Hazloc NEC 500/505, Class 1, Div. 1 and Class 1 Zone 1

  • International IECEx compliance

  • CE certified

Pressure Class

No limitation

Temperature Range

No limitation

Pipe Diameter

No limitation

Bleed Connection

Multiple bleed points


Audible and visual, available locally and remotely (remote monitoring - wireless control from the control room)


Maximum safety for workers and asset - Reduction of the remaining risk to "ALARP" condition

Maximizing plant availability - The remaining installation stays in operation, no further depressurization of up- and downstream installation parts

No greasing - no risk on sudden gas blow-through

No sealant necessary - the valve stays fit for purpose afterwards

No dependency on last line of defense PPE

Significant cost reduction - execution of maintenance according to plan, without delays; prevention of expensive valve repairs; automatic proving (no personnel involved).



Heavy leaking valves might be left unrepaired

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