Portable Boilers  - Steam Container & Trailers


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Type DT & DTM
Steam Capacities 70 - 4,000 kg/hour
Working Pressures 3 - 190 bar gauge
Energy Source (fuel) Fuel oil, gas
- and combinations hereof.
Efficiencies :
The utilisation of Energy depends on actual working loads and steam pressures.
90 - 93%
96 - 98% (
including economizer)
Designs for extreme high efficiencies provided on request.
The Product General Description
Design Sketch Horizontal / Vertical
Data & Dimensions Tables
Steam System Diagram
Flue Gas Data Data & Calculations
Heat Recovery 'Economisers' (flue gas)
Alternative Type Electric Steam Boilers
Steam table



AB&CO are a well-known Danish steam boiler manufacturer, who have specialised in customised solutions including mobile steam boiler units and steam containers.

The quality is supreme and the prices are most reasonable.

The Mobile Steam Boilers are delivered as customised portable solutions on trailers, in containers or build up on a skid-mounted frame. These mobile steam boilers are based on the compact and heavy-duty TT BOILERS steam generator boiler design type DT / DTM. These steam boilers are starting up very fast, and at the same time 100% safe to operate (no risk of steam explosions).

More details on TT BOILERS steam container and skid-mounted steam boiler solutions.



            inquiry data sheet

           company introduction

                steam table 

     tools for thermal engineers




Containerised steam boiler arrangement


Skid-mounted steam boiler arrangement - in one unit

Portable steam boiler arrangement mounted on trailer


Electric steam boiler on wheels
for sterilising on large Danish brewery













The solutions are adapted to the actual circumstances. Capacities, sizes, efficiencies, burner types, scope of supply and much more are provided at only very reasonable extra costs. The stated table values only indicated the sizes of basic steam boilers.

These steam generator boiler have some special features:

Easy & Safe to Operate
- normally very few or no requirement  on installation, start-up an operation from national authorities (depending on actual state law and regulation).
Rapid Start-Up
- from cold condition, which also means no energy consumption when no steam output.
- no large water volume thus small outer dimension. Easy to fit in almost everywhere
Horizontal or Vertical Design ?
- even more flexible to fit into an existing arrangement. Choose between the
horizontal /vertical design.
Environmental & Customised Design
- Efficiency means low fuel consumption,  low CO2 emission and low NOx emission. Thus this gives low operational cost and an environmental (green) profile. A customized design gives different options in this aspect - depending on the investment.
Heavy Duty Design
- Rigid design and constructed to withstand extreme pressure and temperatures - up to 350°C and 190 barg on request (as delivered for a test bench for safety valves for nuclear submarine)
Price Attractive
- both in purchase, but especially in operation. Particular supreme economy at small operation times with periods with no or low steam rates.
Approved & Proven  
- by the most demanding customers and authorities worldwide. The basic design is 'battle proved' - the first units was put into service by TT BOILERS in the 70ties.
Special Optional Features
 - also suitable for
clean steam and pure steam



TT BOILERS steam generator boilers type DT are industrial steam boilers with small and medium sized steam outputs.

Due to a compact and rigid design, these steam boilers are wide used in mobile units :

  • Container Solutions

  • Skid-mounted Solutions

  • Trailer Solutions


The units are developed and designed especially for reliability even during "heavy duty" operations - with no compromise on quality even though it mean higher purchase price. The focus is dedicated to ensure the best long term investment with lowest operational costs during the longest lifetime.

The pressure parts of the basic steam generator boiler are designed as standard up to 40 bar pressure although operation pressure might between 3 - 10 bar (gauge). Pressure of 190°C and design temperature of 350°C on request.

The industrial type steam generator is also known as the steam generator boiler. It operates as a forced circulation water tube boiler. Unlike the conventional fire-tube steam boiler (fire/smoke tube boiler), the water in the steam generator boiler contains a very small amount of water and steam (equal the volume inside the pressure vessel i.e. inside the tube).

As listed up in the left column, this gives quite a few advantages.

The TT BOILERS steam generators are delivered in the range from 100 to 2,000 kg/h steam at design pressure going from 3 barg and all the way up to 190 barg (for special applications). These complete units are easy to install and does not require any special foundation; they can be place directly on a concrete floor.

The advantages are numerous - just image what you gain with a start-up time down to few minutes on the smaller sizes!


Containerised Steam Boiler Room

AB&CO · TT BOILERS offers container solutions comprising all equipment for ensuring a efficient steam production.

Containerized solutions are used widely as an fast and economical way to establish steam up to 2400 kg/h.

It can be used as an emergency steam back-up, when a steam supply fails and a fatal situation occurs. With a container solution from AB&CO · TT BOILERS you can rapidly be "on-steam" again.

This solution is used for end-user of steam, but it is certainly also as an attractive business opportunity to buy these for renting out - and thus offering the above services to end-users.
Delivery options
10 / 20' containers :
Up to 4000 kg/h steam
operating pressures :
1 - 190 bar
20 / 40' containers :
Up to 8.000 kg/h steam
on two steam generator boilers
operating pressures :
3 - 190 bar




Steam Troll.JPG (23704 bytes)

Steam Generator - Vertical type



Type DT generally offers very high efficiencies equal low fuel consumption and low CO2 emission.

But special request on extra high efficiencies and extra low CO2 emission can be offered as a part of our general customized solution features. It costs a little more, but the overall cost are normally lower - and the environmental issue should also been taken into account.

Additional efficiency can be obtained by using an
economiser (optional extra).



The steam generators are prepared with combustion chambers for ensuring Low NOx when choosing an appropriate Low NOx burner. This design also offer high efficiencies. More green solution, often a request. The long term extra costs are very often modest due to the higher efficiency.

NOTE! Without a suitable combustion chamber design, no Low NOx burner can ensure  environmental values with regard to NOx emissions - the boiler design is essential to ensure Low NOx.




DT steam generators can be delivered in horizontal execution (with low height), or in vertical execution (occupying limited floor space). They are delivered insulated with stainless steel cover sheets and complete with burner, armatures, instrumentation, safeties and a control panel - and with full documentation including necessary certificates.

All DT steam generators are carefully checked, controlled and function tested prior to dispatch from the workshop.


The steam generators heaters are made with coils made of seamless tubes, where the feed water is preheated and evaporated during the flow through these. The heat is transferred to the water/steam mixture as radiant heat in the combustion chamber, where the inner cylindrical tube coil and a flat tube coil forms the chamber wall and the bottom respectively. Consequently refractory concrete is avoided. The combustion gasses are hereafter cooled in the outer convection part, as the gasses pass the space between the two tube coils. The thermal design ensures a modest volume of steam relative to the size of the heater, and allows unlimited thermal expansion due to the high temperatures. All TT BOILERS steam generators and steam boilers are designed and equipped according to German TRD boiler regulations and Danish boiler regulations and corresponding EN-norms.

DT steam generators are made in carbon steel, but also different grades of stainless steel.


Stor_Coil_2_Cut.jpg (23562 bytes)

Making the Steam Generators


Beside the standard execution the DT steam generators can be delivered in e.g. following variations:



More info about
  the 'R&D Workshop'


As standard the heaters are provided by international recognized and only high quality burner brands - for natural gas, light fuel oil, heavy fuel oil and combinations (dual fuel). This include Low NOx burner designs. Demands for special burner designs can be fulfilled and adapted in the heater design.


There are indeed some major differences between a steam generator and a classic 3-pass fire-tube steam boiler.

Advantages and disadvantages are present depending on the actual circumstances.

Read more about different type of steam boilers and about making the right choice on selecting the correct type of steam boiler. TT BOILERS manufacture both types and have no preferences in advising in favour of either type.





TT BOILERS steam generators are also delivered for production of clean steam for food industry, pharmaceutical industry, electronically industry etc.

oil/gas-fired clean steam generator     Tube coil of a clean steam generator                                   steam generator with reboilers for pure steam

Sanitary steam (clean steam) for food applications are provided by a steam generator made in high grade stainless steel. The photo above shows a unit  for Rolls Royce in UK which should also have other special features such as steam of  190 barg / 350°C. See more details here about clean steam.


For pharmaceutical industry a special grade of high quality sterile steam is used -  so-called pure steam. The photo above shows steam generators with capacity of 300 kg/h and 600 kg/h - with reboiler, grinded and polished internally. See more details here about clean steam..

wpeA.gif (11196 bytes)

   Steam Generator - Low NOx


Horizontal type only



Oil · Gas
[kg/h · Nm³/h]

A **






E **





   DTM 125

125 87 8,5 · 9 1700 1300 800 700 800 Ø150 150 175

  *    Measurement including control panel , which can be placed anywhere or delivered separately.
  **  Measurement adjusted with respect to nozzles (inlet feed water, outlet steam) which are located at the front.




Oil · Gas
[kg/h · Nm³/h]









   DT 300/100 100 67 7 · 7 1,800 1,400 1,400 1,000 1,500 ø210 440 460
   DT 300/150 150 100 10 · 10 1,900 1,400 1,400 1,000 1,500 ø210 445 465
   DT 300/300 300 200 20 · 21 2,000 1,400 1,400 1,000 1,500 ø210 450 470
   DT 300/400 400 266 26 · 28 2,100 1,400 1,400 1,000 1,500 ø210 455 475
   DT 600/700 700 466 46 · 49 2,550 1,850 1,500 1,100 1,500 ø250 600 650
   DT 1000/800 800 533 52 · 56 2,900 2,400 1,600 1,200 1,800 ø350 1,285 1,385
   DT 1000/1000 1,000 666 65 · 70 3,100 2,400 1,600 1,200 1,800 ø350 1,300 1,400
   DT 1000/1200 1,200 800 78 · 84 3,300 2,400 1,600 1,200 1,800 ø350 1,325 1,425
   DT 1500 1,500 1,000 98 · 105 On request
   DT 2000 2,000 1,333 130 · 139

TABLE VALUES · Presumptions

The below stated values for heat capacity and fuel consumptions are based on 80°C feed water temperature, 7 bar steam pressure, 90% efficiency and normal European quality light fuel oil (LCV=42 MJ/kg) and natural gas (LCV=40 MJ/Nm³)