Accessories
Over-/under pressure safety valve
The over-/under pressure safety valve is a safety device to securely prevent unacceptable gas pressures in tanks and gas storage covers. Sealing is achieved by a sealing liquid, generally a water-glycol mixture with a density depending on the mixing ratio. We offer pressure safety valves in different designs for different operating pressures and volume flows according to your requirements. On request, we are also happy to offer you a suitable booster heating system to go with it.
Thermal protection foil
By additionally installing our thermal protection foil, we estimate that you can reduce heat loss in the double membrane gas storage by up to 30%.
The gas storage volume that is located above this heat protection foil is nonetheless available without limitations. Subsequent installation of the thermal protection foil is possible.
Calming system
Flexible and expandable tension elements above the gas storage membrane cause stabilization of the shape of the gas storage membrane independent of the gas filling level.
As a result, peaks and excursions during level measurement are considerably damped and mapped more accurately. The stored gas volume can be better utilized and the control of the BHKW can be more precise.
The advantages are:
• much more accurate level measurement,
• less movement of the gas storage membrane and
• the possibility of reducing the number of measuring points in hydraulic systems.
The installation of our calming system is also possible afterwards.
Supporting air blower
Depending on the structure, size and operation of the gas storage, we plan the design of the required supporting air blowers (ATEX design).
By selecting the appropriate blowers, it is possible to adjust the pressure ratios in the individual storage units within the permissible pressure specifications and thus optimally control the gas flow and ensure safe operation. Overloading of the membrane during pressure peaks is reduced many times over, which considerably extends the service life.
All blower types are kept in stock by us to ensure quick delivery in case of replacement needs.
Belt tensioning system
The belt tensioning system is used to support additional loads acting on the weather protection membrane.
The way the belts are arranged over the weather protection membrane distributes the loads evenly among the belts. Thus, the membrane is substantially relieved precisely in the area of maximum stress.
The reserves for higher internal pressures, wind loads and stability of the storage units as well as during overpressure events are increased many times over. This provides the operator with real added value in terms of operational reliability and costs.
Measurement technology
Level measurement with cable pull system and level measuring rod
In the mechanical rope pull system, a rope is laid over the gas storage foil and guided outward through the weather protection foil. This is guided in a transparent tube and connected to a weight. A level measuring rod transmits the level with a signal range of 4-20 mA to the system control unit.
This system is simple and easy to maintain due to separation of sensor and mechanics. It also includes a visual indicator on the container.
Level measurement with Laser Sensor
Laser level measurement system provides accurate distance measurements between both membranes while being powered by a 4 to 20 mA current loop.
Measurement points for further measured values
For optimal system control, we can provide you with preparations for additional measuring points in the foil. On request, we can also offer you suitable sensors, such as pressure measurement or supporting air monitoring.
Compressed air supply
If the foils are fixed with a clamping hose, a compressed air supply is necessary. The compressed air set distributes the air to the clamping hose and is equipped with a pressure gauge and a pressure switch.
We additionally recommend the installation of a glycol unit (see below).
