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US Patent 5,194.1993 (May 16, 1993)
In the shipbuilding sector, it is an obligatory duty to reduce the risk to human life to an absolute minimum and to restrict any damage to property within limits.
AEG Isolier-und Kunstsoff GmbH (now AIK Flammadur Brandschutz GmbH) has many years of experience in the fields of fire protection and marine electrical engineering at their disposal. One of the results of this is the Geaquello cable sealing system, which complies with the basic principles of optimum ship safety. It has been specially developed for the penetration of cables through shipboard partitions in order to guarantee their safety even if damage should occur.
The test results surpass the safety requirements of the SOLAS and IMO for A60 bulkhead and decks type divisional surfaces.
It is therefore possible to design cable penetrations exactly as required for shipbuilding applications, allowing for the minimum length (sealing length plus end wall thicknesses) and the proportion of cable (max. 40 %) (refer to user information).
Building up the end wall (damming wall)
The end wall is built by fitting the swell strips roughly around the cables. This ensures that the minimum clearance is maintained between the individual cables. The strips can be torn apart at the preformed cuts to produce short sections. The swell strips must be used to separate all of the cables from one another and from the supporting wall to ensure that each cable is later enclosed by the sealing compound.
Sealing the end wall
The swell strips expand when sprayed with the blue impregnation fluid E824, creating a stable, sealant-proof, green end wall in a matter of minutes. Once the strips have been sprayed correctly and have swollen, the resulting end wall is flame-resistant, fire-retardant, self-extinguishing and free of halogen. The porous structure of the swell strips stimulates the drying process.
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Mixing the sealing compound
The sealing compound powder is mixed into the corresponding liquid component according to the respective mixing ratio (refer to the technical data). Once mixed, the resulting sealing compound can be poured and pumped easily. If the mixing ratio is correct, the compound will run from the mixing stick in a thin stream, without forming drops and free of lumps, from a height of around 0.3 m (approx. 1 foot) (mixture check). All items of equipment can be cleaned with water within the application time.
Sealing the cable penetration
Penetrations have been properly sealed when the filling and venting apertures have been filled to the brim and the sealing compound no longer sinks. All cables are then hermetically encapsulated by the sealing compound. The compound thickens after an application time of approx. 3 - 4 hours at room temperature. Chemical hardening takes place over a period of approx. 72 hours.
Sealing with either compounds E 795 or E 950
Both sealing compounds are produced by mixing two components: liquid and powder. If the mixing ratio is correct, both compounds can be poured and pumped easily during the respective application time. They are inorganic and achieve their good sealing effect by expanding during the hardening process. They are generally recognized as physiologically safe, are safe to use and are not harmful to the environment.
E 795 (relative density: approx. 1.65). Earlier product
The liquid component A and powder component B of this sealing compound are supplied in a weight ratio of 1:3, which also constitutes the correct mixing ratio. The outstanding quality of sealing compound E 795 is its high mechanical stability when hardened.
E 950 (relative density: approx. 1.0). Later product
Only the powder component is supplied for this sealing compound. Its liquid component, drinking water, is simply added on site and mixed until the sealing compound is ready to use. The correct mixing ratio is around two parts powder to one part water. This sealing compound can be removed easily for subsequent cable installation. The light density is particularly advantageous. The outstanding quality of sealing compound E 950 is its high mechanical stability when hardened.
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