MD balloons
These multidimensional balloons for sealing gas pressure in pipelines are made by double vulcanization from a mixture of rubber and Kevlar. This process creates robust yet highly flexible balloons that adapt very well to differences in the internal diameters of steel, cast iron, or polyethylene pipes.
These balloons withstand an internal inflation pressure of up to 4.5 bar, which is three times the maximum allowable back pressure in the pipelines they are designed to seal. In practice, for safety reasons, the maximum allowable pressure for sealing is 1.0 bar. Compared to standard balloons made of rubber or plastic coverings, these balloons offer significantly increased resistance to mechanical and thermal damage.
They are supplied with a rubber-protected pressure gauge with a measurement range of 0–2.5 bar, featuring a red limit mark at 1.5 bar for internal overpressure. Alternatively, they can be supplied with a gauge with a range of 0–1 bar for balloons with DN 250–600 mm. The inflation connector has a diameter of 5 mm for balloons with DN 50–400 mm or 7.5 mm for balloons with DN 450–600 mm.
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