Vitomax HS

Your local Viessmann sales partner will provide you with individual advice.

High pressure steam boiler

Performance range: 0.5 - 31.5 t/h

High efficiency

With more than 95.5%

H2 Readiness

Works with hydrogen up to 100%

Wide range of fuel options

Such as hydrogen, natural gas, fuel oil, heavy fuel, biogas, bio-oils and many others.

Precisely sized steam chamber

At low load (without water carryover)

Pressure levels

from 0.5 to 30 bar

Built-in steam dryer

For high quality steam

Corner posts arranged in pairs

Reduces stress in the boiler

Optimal geometry of flame tubes

For clean combustion

Maximum long intervals between inspections and easy maintenance

With sufficient openings for inspection and access

For use in the manufacturing industry

Can be used in a wide range of industries

Vitomax HS – ideal for industrial use

The Vitomax HS steam boiler complies with Category IV of Pressure Equipment Directive 97/23/EC, with a permissible operating pressure of 6 to 30 bar. It is used in industries such as food, fertilizer, construction materials, paper, beverage, chemical and pharmaceutical, hospitals, and refineries, where steam is used as a process, propellant, or reaction medium.

Hydrogen up to 100 percent

In chemical production, such as chlorine production and other industrial processes, much of the hydrogen gas is wasted and released into the atmosphere. Vitomax boilers, which can operate on 100% hydrogen with the appropriate burner, offer a cost-effective and efficient solution. At the same time, significant amounts of climate-damaging _CO2 emissions are avoided .

Product Features

Vitomax HS high-pressure steam boilers meet all legal requirements for clean combustion. The efficiency of these boilers with an economizer exceeds 95.5 percent, even at full load.

Regardless of fuel used, the Vitomax HS delivers up to 31.5 tons of steam per hour. It is specifically designed for process industries where steam is required continuously. Thanks to its large evaporator with integrated steam dryer, the key feature is high-quality steam with low residual moisture. The Vitomax HS can operate flexibly with light or heavy fuel oil, bio-oil, or even (bio)natural gas.

Vitomax boilers feature an innovative burner entry point that eliminates the use of concrete. This means it is water-cooled and wear- and maintenance-free, eliminating the need for replacement during the boiler’s lifespan. Water cooling ensures a constant temperature in the burner head—the usual reflection from the refractory lining (which causes thermal _NOx formation ) is eliminated.

The Vitomax HS’s burner inlet and rear flue gas reversing chamber are water-cooled. Therefore, flue gas energy is used exclusively for steam generation.

All Vitomax HS high pressure steam boilers are suitable for firing up to 100% hydrogen, provided our _H2 usage guidelines are met .

The distances between the individual flue pipes, as well as from the flue pipes to the boiler body and fire tube, comply with legal requirements. Therefore, the shear stress on the end caps caused by the differential linear expansion of the smoke tubes and fire tube is extremely low. This design guarantees a long service life for the Vitomax HS.

To facilitate maintenance and repairs, like all other Vitomax boilers, the Vitomax HS is equipped with sufficient inspection and access ports for essential internal checks. This allows Vitomax high-pressure steam boilers to offer the longest possible intervals between inspections. Easy-to-open boiler doors and a cleaning door at the end of the boiler also ensure easy maintenance and contribute to low operating costs.

Hydrogen up to 100%: comparable _NOx values as fuel oil/natural gas
Fuel oil (EL), _NOx emissions (possibly < 150 ^mg/m3 flue gas)
Heavy fuel oil, fuel oil 100
Natural gas, _NOx emissions (possibly < 70 ^mg/m3 flue gas)
And many others, such as biogases/bio-oils or animal fats.

Food industry
Fertilizer industry
Building materials industry
Paper industry
Beverage production
Chemical industry
Pharmaceutical industry
Hospitals
Oil refineries

Product cross-section*

The product cross-section is only an example of what a Vitomax HS high-pressure steam boiler might look like. Variations are possible depending on the individual order.

Modularity – variations at the hardware level

Burner entry point:
a) Lined (standard)
b) Water cooled – maintenance free/wear resistant (optional)
Boiler cover:
a) Without boiler cover / round insulation (standard)
b) Hinged boiler cover prepared for mounting on a platform (optional).
Modular work platform (optional – only in combination with boiler cover)
Boiler support :
a) Cross plates (standard < 14 t boiler weight)
b) Cross plates with longitudinal I-beams (optional < 14 t boiler weight / standard > 14 t boiler weight
c) Full I-beam version (optional).
Flue gas collector with rear outlet: Round design (standard)
Integrated heat exchanger and flue gas collector:
a) Integrated heat exchanger with flue gas collector and outlet at the back (optional)
b) Integrated heat exchanger with flue gas collector and outlet at the top (optional)
c) Flue gas collectors with outlet on the left or right are also optional.
Front reversing chamber with superheater module (optional)