For the glass industry SENN supplies polycrystalline fibre mats and microporous high-temperature insulation for melting tank and forehearth, plus fabric expansion joints for hot-gas ducts — made in Erl.
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Melting tank, forehearth and ducts run continuously at the highest temperatures — insulation and expansion joints have to absorb the movement safely. SENN supplies polycrystalline high-temperature insulation and expansion joints for flat and hollow glass from one source.

Applications in detail

  • Melting tank: polycrystalline fibre mats and microporous insulation for the highest temperatures.
  • Forehearth & working end: calcium silicate and fibre modules against heat loss.
  • Hot-gas ducts: fabric expansion joints absorb the movement.
  • Contact protection: removable textile jackets on hot components.
  • Feeder & working end: fibre mat modules against heat loss.
  • Hot-gas ducts: metal expansion joints for movement, refractory concretes for heavily loaded zones.
  • Contact protection: textile jackets, removable for maintenance.
  • Regenerator & working end: high-temperature insulation for regenerators, working end and feeder channels.

Why SENN

  • Refractory insulation, Expansion joints from one house — one partner for the whole plant.
  • Made in Erl, fabricated to drawing.
  • Insulation to 1000 °C (silica), ceramic-fibre ceiling 1260 °C; chains from EU steels.
  • Removable insulation for turnarounds, tool-free mounting.
  • Refractory concretes, fibre modules and expansion joints — matched to melting tank and ducts.

Service & Installation

  • On-site survey: measuring components, lines and conveyor runs before production.
  • Turnaround service: replacement and repair during plant revisions and shutdowns.
  • Custom fabrication to drawing: production to drawing, sample or measurement from Erl.

Planning a project in this sector? We deliver the right components from one source.

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Frequently Asked Questions (FAQ)

Which insulation withstands the melting tank and feeder?

Polycrystalline fibre mats and microporous insulation for the melting tank, calcium silicate and fibre modules for feeder and working end. Ceramic fibre up to 1260 °C.

How do you absorb movement in hot-gas ducts?

With fabric expansion joints, sized to temperature and cross-section. Plus removable textile jackets as contact protection on hot components.

Do the insulation and expansion joints come from one source?

Yes. Refractory insulation and expansion joints come from the same house. Made in Erl, custom to drawing.

What do you use in heavily loaded hot zones?

Refractory concretes, bricks and masses for heavily loaded zones, plus polycrystalline fibre mats and microporous insulation at the melting tank.


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