Vitomax HW

Vitomax HW

High pressure hot water boiler

Output range: 0.35 – 20.0 MW

Output range: 0.35 - 20.0 MW
Flow temperature > 110 °C
High efficiency over 95.5%
H2 readiness 100%

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

High pressure hot water boiler

Output range: 0.35 - 20.0 MW

Flow temperatures

>110 °C

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.

Safety temperatures

≤ 210 °C

Pressure levels

from 0.5 to 30 bar

Certification according to the Pressure Equipment Directive

For permissible flow temperatures > 110 °C

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 HW high-pressure hot water boilers with a capacity from 0.35 to 20.0 MW for industry

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 HW high-pressure hot water boilers meet all new legislative requirements for ultra-clean combustion. The efficiency of these boilers with a heat exchanger exceeds 95.5 percent, even at full load.

Regardless of fuel used, the Vitomax HW delivers output of up to 20.0 MW. It is specifically designed for the manufacturing industry, as well as local and district heating networks, where high temperatures and flow pressures are required.

The low-load, compact design ensures good natural circulation and reliable heat transfer. No additional boiler pumps are required, significantly simplifying the hydraulic connection. The Vitomax HW can be flexibly operated 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 service life. Water cooling ensures a constant temperature around the burner head, eliminating the usual reflection from the refractory lining (which causes thermal _{NOx formation).}

The Vitomax HW’s burner inlet and rear flue gas reversing chamber are water-cooled. This means the flue gas energy is used exclusively for hot water production.

All Vitomax HW high-pressure hot water boilers are suitable for burning up to 100% hydrogen, subject to our general conditions for the use _{of H2} .

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 HW.

Like all other Vitomax boilers, the Vitomax HW is equipped with sufficient inspection and access ports for essential internal checks. This allows Vitomax high-pressure hot water 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
Local and centralized heating networks

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:
a) round design (standard)
b) rectangular design (optional)
Integrated heat exchanger and flue gas collector:
a) Non-condensing heat exchanger (optional)
b) Condensing heat exchanger (optional)
c) Flue gas collector with round outlet
Combination of non-condensing and condensing heat exchangers possible.