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Unpressurised gas depot

Suspended in the container is a gas membrane, which is usually filled by the pressure of the upstream digestion tank. By means of a downstream compressor, the gas is fed for further utilisation. The membrane unfurls or contracts depending on the gas fill level.

With centrally suspended gas bags, the fill level can be measured continuously. The container is operated without pressure. An overpressure safety device activates at at 5 mm WS.

Operating instructions

If a gas network is connected directly to an unpressurised gas depot and no pressure-retaining measures (e.g. pressure-retaining valve) are in place, the prevailing condition is virtually unpressurised. Consumers can only be operated with a downstream compressor.

Pressure curve

In regular operation, the gas bubble of the container is unpressurised. Because the gas bubble unfolds, there is no significant increase in pressure when the tank is filled further. Only when the pressure bubble is full and bulging does the pressure increase.

Current references

Technology Accessories

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stainless steel lightweight roof

Lightweight roofs are supplied in the stainless steel grades V2A, 1.4301 (AISI 304) and V4A, 1.4404 (AISI 316L). The construction is selected to fit the diameter, static loads and openings. stainless steel lightweight roofs are used, for example, in wastewater tanks, thick sludge depots and leachate depots. Alternative roof systems are also available, such as double-membrane roofs, tarpaulin covers or special solutions.

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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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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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Hydraulic pressure protection

We build our DEKRA-approved overpressure and underpressure protection systems for a wide variety of installation sites. These can be integrated – so as to be impervious to frost – or externally mounted on the tank. An externally positioned design is also possible. The response pressure, maximum pressure and maximum volume flow are considered according to your requirements; the pressure protection is designed and built accordingly. On request, we can examine the system on our test bench and prepare a corresponding report. We can also carry out an individual acceptance test in cooperation with DEKRA.

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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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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.

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Walkway 

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.