Boilers & Reboilers for Food & Sanitary Applications


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AB&CO are a well-known Danish clean steam boiler manufacturer, who have specialised in small and medium-size customised heaters and boilers.

Clean steam can actually be produced directly in a stainless steel
steam generator boiler, electric steam boiler (see left) or as a reboilers that heat exchange industrial steam to clean steam production (see below).

extract of references

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What is Pure Steam - and what is Clean Steam ?

Conventional steam contains foreign particles from chemicals, from the metal and from the feed water. Normally this does not cause any problems. But even though the temperatures are high, killing most germs etc., conventional steam cannot be considered 100% clean.












 Introduction to Clean Steam Boilers


Special high quality steam is used in special applications on hospitals, special institutions, pharmaceutical industry, biochemical industry, food industry etc. 

The terms often used for this high quality steam, are clean steam and pure steam.

Clean Steam at Danish Hospital

Clean steam
is made in an hygienic environment of stainless steel. It is clean, which means that it does not contain significant amounts of particles with e.g. iron, iron oxide and dirt of any kind. The feed water quality is likewise in an appropriate quality. Application could be food industry, and chemical industry.

Stainless steel steam boiler. Design 350°C / 190 bar for testing safety valves at Rolls Royce in UK. Tube coil and all part in contact with steam are made in high grade stainless steel


Pure steam is both something similar to clean steam, and still something quite different. The quality of pure steam is extremely high. This kind of steam is often used in direct contact with medicals and controversial sterile parts - it must not for contains any particles what so ever. It is therefore generated in a super sanitary environment. Application is being even more common within hospitals, but also special institutions, pharmaceutical industry, biochemical industry. Both clean steam and pure steam applications can be solved by TT BOILERS solution.


Polished surface of steam heating element
for pure steam application
(Reboiler Heating Coils)



The clean and pure steam application both requires a special design on the feed water provider and the steam generating plant. Obviously the quality of feed water determine the quality of the steam. The general design comply with materials in stainless steel only.

Pure steam requires that the surface in contact with the pure steam, including weldings, are polished. The design must not allow any traps in which condensate cannot be drained off 100%. All parts - materials and components - must be of a very special pure steam quality.

Available heat sources for making clean steam and pure steam:

   >  Pressurized Water
   >  Thermal Fluid
   >  High pressure steam (reboiler)
   >  Electrical
   >  Oil/gas-fired (clean steam only)

Basically reboilers use high pressure steam to produce low pressure steam. Thus the design can be made in a customized degree of sanitarily.

Clean steam and pure steam boilers and generators are available up to 25 barg working pressure. Sanitary design with thermal fluid is an option. See the chapter about Thermal Fluid (Hot Oil) Heater Units.



Small Economical Clean Steam Boilers
Culinary & Sanitary Applications


Unfired Steam Generators

TT BOILERS manufactures reboilers as unfired steam generators for conventional steam production without any sanitary requirement. Standard boiler armatures and materials in carbon steel are used.

Pure Steam Reboiler
for Pharmaceutical Industry

01   Steam Outlet
02   Feed Water Supply
03   Drain, Blow-Down
04   Safety Valve(s)
05   Steam Blow-Out
06   Control Box
07   Pressure Gauge
08   Water Level Control
09   Pressure Control
10   Water Level Gauge
11   Heat Exchanging Coil


More info about
  the 'Boiler Works'



Pure Steam Plants for Pharmacosmo Ltd. 300 kg/h and 600 kg/h.


 inquiry data sheet           company introduction           steam table       tools for thermal engineers



Manufacturer of Clean Steam Boilers since 1990

- when the World, Kasper and Morten were young.