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Low pressure gas depot

As dry gas depots, low pressure gas depots are excellently suited for the storage of sewage gas. The digester acts as a pressure generator, lifting the weighted ballast plate and storing the produced gas under constant pressure. Downstream consumers can be operated without any additional increase in pressure.

Low pressure gas depots have the advantage that there is permanent pressure in the entire gas system and therefore no risk of oxygen entering the gas system when the depot is full. The linear movement of the ballast plate furthermore enables very accurate measurement of the stored volumes.

We supply low pressure gas depots from 50 m³ to 7,000 m³ and at pressures ranges from 20 mbar to 65 mbar.

The depots are designed as biogas containers with a weighted membrane in accordance with DWA M-376. Since all roller guides are located outside the gas compartment, the ballast plate guide is maintenance-free. Since corrosion-resistant materials are used, such as stainless steel and enamelled steel, refurbishment of the depot - as with coated black steel constructions - is unnecessary.

A common feature of all our gas depots is that they are bolted together onsite from individual steel segments after careful preliminary planning and construction. The advantages of this are:

  • Quality control of components still in the factory
  • Precisely fitting construction elements
  • Short construction time with maximum independence of weather conditions
  • No work at great heights, no scaffolding, no sandblasting or coating work on the system
  • Excellent corrosion protection thanks to the use of enamelled steel and stainless steel

Current references

Technology Accessories

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Nozzles

For connection of the pipeline, we use nozzles with external loose flange or internal fixed flange. The surfaces in contact with the medium are made of V4A, 1.4404 (AISI 316L).
We also design and install special customer-specific solutions.

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Pipeline construction

To ensure an optimal construction process, we offer our customers delivery and installation of piping construction on and in the tank during assembly.
The pipelines are designed according to customer’s desires and specifications.

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Manhole / roof hatch

For inspection and maintenance work on the tank or technical installations, we recommend installing a manhole in the lower ring. In accordance with DIN EN ISO 28765, covered tanks must have a manhole DN 800. Manholes can be epoxy-coated or made of V4A stainless steel. In addition to lateral manholes, roofs can be supplied with various hatches. For gas depots, doors are also available. 

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Ladder

With a ladder, various operating points on your tank can be easilyreached. The standard material is hot-dip galvanised steel; on request, however, stainless steel or fibreglass (GfK) versions are also available. Alternative access options such as winding staircase, spiral staircases or staircase towers are available. 

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Tank jacket staircase

With a tank jacket staircase, various operating points on your tank can be easily reached. The standard material is hot-dip galvanised steel; on request, however, stainless steel versions are also available. We supply winding staircase in widths of 800 mm and 1,000 mm. Alternative access options such as ladders, spiral staircases or staircase towers are available. 

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Spiral staircase

With a spiral staircase, various operating points on your tank can be easily reached. The standard material is hot-dip galvanised steel; on request, however, stainless steel versions are also available. Alternative access options such as ladders, winding staircase or staircase towers are available. 

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Platform

We offer walkways in various designs. Polygonal walkways on the jacket or straight/sloping roof walkways are designed in accordance with EN 14122. We use standard widths of 800 mm or 1,000 mm. Walkways and platforms have gratings according to R12. They are connected to the tank wall via the substructure.