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Removable immersion heater
energy saving

Removable immersion heater - Glass Service - energy saving
Removable immersion heater - Glass Service - energy saving
Removable immersion heater - Glass Service - energy saving - image - 2
Removable immersion heater - Glass Service - energy saving - image - 3
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Characteristics

Type
removable
Other characteristics
energy saving
Power

Max.: 16,000 W
(21.75 hp, 67.98 hp)

Min.: 7,000 W
(9.52 hp, 27.19 hp)

Description

Technology description
  • Immersed dry molybdenum electrodes mounted on side-walls of each section provide direct electrical heating of distributor and forehearth glass.
  • Electrodes transfer heat by direct current passage through the molten glass, improving local thermal control.
  • Electrode cooling is air-based via a centrifugal fan (waterless), simplifying installation and eliminating water piping and management.


Startup & maintenance
  • Dedicated preheating procedure enables safe hot insertion of electrodes during startup.
  • Electrode holders engineered for efficient cooling with low-pressure centrifugal fan air; holders allow straightforward replacement and inspection.
  • Ground electrode placed near the spout and monitored with current control and alarm for electrical safety.


Power, voltage & safety
  • Power per electrode is limited to ensure thermal homogeneity and extend molybdenum life.
  • Typical installed power per section: 20–50 kW; delivered power per heating zone typically 7–16 kW.
  • Electrode voltage is kept very low for operator safety (typically ~50–100 VAC max).
  • Low per-electrode power and voltage reduce risk during maintenance and production operations.


Electrical control & protection
  • Power electronics based on thyristor control with low-power dry-type transformers for precise regulation at low electrical powers.
  • Dedicated fuse per electrode (fuse-board) provides short-circuit protection and electrical isolation for single-channel maintenance.
  • Design addresses short-circuit protection and elimination of residual voltage in the glass gob.
  • Optional Vdc current/voltage compensator available for advanced control.


Performance & environmental benefits
  • Immersed electrode heating can reduce combustion energy demand by up to ~60% versus traditional air/gas heating.
  • Corresponding CO2 emissions can be reduced by up to ~60% compared to air/gas systems.


Applications & materials
  • Suitable for all common glass types: flint, amber and green glass.
  • For extra flint or lead crystal, tin oxide electrodes can replace molybdenum to avoid slight grey shading from chemical interaction.


Additional notes
  • Design strategy favors a larger number of low‑power electrodes to ensure thermal uniformity across sections.
  • Ground electrode monitoring and alarm systems reduce risk from insulation faults.


Technical specifications
  • Heating method: immersed dry molybdenum electrodes (side-wall installation)
  • Electrode cooling: air-cooled (centrifugal fan), no water cooling
  • Typical installed power per section: 20–50 kW
  • Typical delivered power per zone: 7–16 kW
  • Typical electrode voltage: 50–100 VAC (maximum)
  • Control: thyristor-based power panels with low-power dry-type transformers
  • Protection: dedicated fuse per electrode and short-circuit protection; ground electrode current monitoring and alarm
  • Optional: Vdc current/voltage compensator; tin oxide electrodes for special glass types
  • Energy/Emissions benefit: up to ~60% reduction in combustion energy and CO2 vs air/gas heating

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.
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