Electric Steam Generators
Model
NDD-3
The NDD series stands for compact, portable steam generators with a small footprint and a high degree of flexibility in installation. Thanks to their simple operation and the option of decentralised installation, the series is the ideal solution for a fast steam supply that matches actual demand. All units in this series are supplied with a 3 m electrical connection cable including a CEE plug.
Capacity class
7 variants
→ swipe for more classes
- Steam output
- —kg/h
- Pressure max.
- —bar(g)
- Heating output
- —kW
Equipment
3 variants
Purchase or rental *
Please choose purchase or rental.
Options (0 of 5)
Technical data
This series is available in 7 capacity stages, depending on the required steam volume or available connected load.
Series data sheet (PDF, all 7 capacity classes) NDD3-3 active - Steam output 4.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 3 kW
- Steam output 4.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 3 kW
Performance
- Steam output(kg/h)
- 4.0
- Heat output(kcal/h)
- 2,617
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 3.0
- Total connected load(kW)
- 3.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 5
- Fusing (site-supplied)(A)
- 10
- Minimum cross-section(mm²)
- 4x2,5
- Connector plug
- CEE 16A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD4,5-3 - Steam output 6.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 4.5 kW
- Steam output 6.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 4.5 kW
Performance
- Steam output(kg/h)
- 6.0
- Heat output(kcal/h)
- 3,925
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 4.5
- Total connected load(kW)
- 5.0
- Control voltage(V DC)
- 24
- Total rated current(A)
- 7
- Fusing (site-supplied)(A)
- 16
- Minimum cross-section(mm²)
- 4x2,5
- Connector plug
- CEE 16A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD6-3 - Steam output 8.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 6 kW
- Steam output 8.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 6 kW
Performance
- Steam output(kg/h)
- 8.0
- Heat output(kcal/h)
- 5,233
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 6.0
- Total connected load(kW)
- 6.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 9
- Fusing (site-supplied)(A)
- 16
- Minimum cross-section(mm²)
- 4x2,5
- Connector plug
- CEE 16A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD9-3 - Steam output 12.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 9 kW
- Steam output 12.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 9 kW
Performance
- Steam output(kg/h)
- 12.0
- Heat output(kcal/h)
- 7,850
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 9.0
- Total connected load(kW)
- 9.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 13
- Fusing (site-supplied)(A)
- 16
- Minimum cross-section(mm²)
- 4x2,5
- Connector plug
- CEE 16A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD12-3 - Steam output 15.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 12 kW
- Steam output 15.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 12 kW
Performance
- Steam output(kg/h)
- 15.0
- Heat output(kcal/h)
- 9,812
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 12.0
- Total connected load(kW)
- 12.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 18
- Fusing (site-supplied)(A)
- 20
- Minimum cross-section(mm²)
- 4x4,0
- Connector plug
- CEE 32A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD15-3 - Steam output 20.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 15 kW
- Steam output 20.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 15 kW
Performance
- Steam output(kg/h)
- 20.0
- Heat output(kcal/h)
- 13,083
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 15.0
- Total connected load(kW)
- 15.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 22
- Fusing (site-supplied)(A)
- 32
- Minimum cross-section(mm²)
- 4x4,0
- Connector plug
- CEE 32A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
NDD18-3 - Steam output 24.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 18 kW
- Steam output 24.0 kg/h
- Pressure max. 3.0 bar(g)
- Heating output 18 kW
Performance
- Steam output(kg/h)
- 24.0
- Heat output(kcal/h)
- 15,699
- Working pressure min.(bar(g))
- 1.0
- Working pressure max.(bar(g))
- 3.0
- Max. operating pressure(bar(g))
- 3.8
- Max. steam temperature(°C)
- 144
Electrical ratings
- Operating voltage(V)
- 400
- Frequency(Hz)
- 50
- Phases
- 3+PE
- Heating output(kW)
- 18.0
- Total connected load(kW)
- 18.5
- Control voltage(V DC)
- 24
- Total rated current(A)
- 27
- Fusing (site-supplied)(A)
- 32
- Minimum cross-section(mm²)
- 4x6,0
- Connector plug
- CEE 32A
Mechanical connections
- Steam line
- Internal thread G1/2"
- Water inlet
- External thread R1/2"
- Blowdown valve
- Internal thread G1/2"
- Safety valve
- Internal thread G1/2"
Dimensions & emissions
- Width(mm)
- 650
- Height(mm)
- 850
- Length(mm)
- 730
- Weight(kg)
- 65
- Sound pressure level(dB(A))
- 60
Frequently asked questions about this series
Can the NDD series also be fed with demineralised water?
Yes, this is possible in principle. The system then requires the Standard equipment version, as demineralised water attacks the brass parts and cannot be controlled via a conductive level measurement, since this requires a feedwater conductivity of at least 20 µS/cm.
What is the minimum inlet pressure required for the feedwater line?
The inlet pressure must be greater than 3.0 bar(g), as the systems in this series are not equipped with a feedwater pump and the line inlet pressure must always be slightly above the working pressure in the boiler so that the water can be forced into the boiler. A feedwater pump can be retrofitted on request.
Does the system have an automatic blowdown function?
Not as standard equipment. An automatic blowdown can be fitted as an optional extra.
Which pressure ratings can be run?
The pressure rating can be freely selected within the range from 1.0 to 3.0 bar(g).
Can the heating output be reduced, e.g. where the available connected load is limited?
Yes, by switching off individual heating elements. For example, an NDD18-3 (18 kW) becomes an NDD4,5-3 (4.5 kW) when 3 of the 4 heating elements are switched off in the control cabinet.
What should be observed when connecting the safety valve line?
The safety valve line should always be routed to the open air without pressure. Make sure that the outlet is positioned so that nobody is put at risk if the safety valve releases unexpectedly.
Matching accessories for NDD-3
These products are frequently used together with the NDD-3 — for optimal water quality and safe operation.
Water Treatment
Single-column softening system
Compact single-column softening systems (KKC series) for water softening of smaller water volumes in single- or two-shift operation.
Learn more
Blowdown Vessel
Blowdown vessel
The blowdown vessel cools hot blowdown and condensate water down to a permissible discharge temperature by admixing cold water.
Learn moreNon-binding consultation on NDD-3
Our specialists in Bremen configure the system to match your requirements and advise you on the accessories you need.