Porcelain tube

The most commonly used solution


This type of heaters are manufactured in protective tubes made of firm porcelain. They are delivered with protective caps and connection cables. The main advantage is the possibility of changing the ceramic cartridge (or tubular element) without changing the protective tube. They are used for heating of fluids in electroplating baths and tanks. The heaters are immersed directly in liquid. Porcelain coat is long standing. Due to high content of Al2O3 it is resistant to frequent changes of temperature. Porcelain tubes are not resistant to mechanical damage and shocks. Porcelain tubes can be seriously damaged when operating on dry, outside of fluid. As a rule porcelain tubes are resistant to acids, but hydrofluoric acid is an exception.


  • Phosphating baths
  • Nickel-plating baths
  • Tin-plating baths
  • Other electroplating baths and tanks

Technical data

Type of

Liquid heating


Porcelain tube
Polypropylene (PP) protective cap
Ceramic heater or stainless steel tubular heater


Diameter of tube: Ø48, Ø54, Ø58mm
Length of tube: 400, 600, 800, 1000, 1250mm
Inactive length: 150, 200, 250mm
Protective cap: Ø96x100mm


Vertical position in the bath


PVC cable 2m included


Standard range or acc. to customer specification

With ceramic heater inside tube
With tubular element inside tube


Voltage: 230V, 400V, 3x400V
Power: 800W, 1000W, 1500W, 2000W, 2500W, 3000W, 3500W, 4000W
Operating temperature: 30-90°C
Protection class IP66

Regulation: External thermostat, Liquid level controller


  • Resistant to frequent changes of temperature
  • Changing the heater without changing the tube
  • Porcelain tubes are resistant to acids

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