Flash-Off Dryers and Curing Ovens

Flash-Off Dryers

Flash-off dryers are designed to remove residual moisture from workpieces after the pretreatment process. Specially developed air nozzles generate a turbulent airflow around the workpiece, ensuring efficient and uniform drying. This optimized airflow allows the drying temperature to be kept as low as possible, reducing energy consumption while maintaining excellent drying performance.

Continuous Curing Ovens

A continuous curing oven is the simplest configuration for curing coated workpieces. Components are transported through the oven by a conveyor system, with the curing time determined by the conveyor speed and the overall conveyor length. These ovens are typically designed without doors and instead use airlocks to reduce heat losses.

Although continuous curing ovens generally require a lower initial investment, they have higher energy consumption than other oven concepts.

A-Slotted Curing Ovens

The A-slotted curing oven is one of the most energy-efficient curing solutions available. Unlike conventional continuous ovens, it does not require doors or airlocks, further reducing energy losses. This design requires sufficient building height and is particularly suitable for the efficient curing of smaller workpieces.

Batch curing oven

In most cases, a batch curing oven is used. The openings are closed with doors during the heating process and after each cycle, which saves a significant amount of energy. Workpieces are placed in the batch oven and remain inside until the preset curing time is completed. Airlocks can be installed for large openings to further reduce heat loss.

Gelation zone / Locks

A gelation zone is used when frequent color changes are required. The zone is supplied with hot air, which is generated by the curing oven’s ventilation unit. The curing process begins here, as the powder coating is melted at a low temperature, ensuring high-quality results. The gelation zone can also be considered a temperature airlock, preventing excessive heat loss into the workspace.

Door system

Our oven systems use custom door systems. Depending on part dimensions and available space, we plan either hinged or sliding doors, which can be single or double doors.

Special attention should be paid to the double sliding doors. These doors are motorized, can be individually opened or closed, and integrate complete safety in the drive system, eliminating the need for additional safety strips that need annual checks and replacements.

Technical data:

Typical part dimensions:
Length: 1-12 m
Width: 0.2-2 m
Height: 1-3.5 m

Other dimensions are available on request.

Heating media:
Natural gas
Propane gas
Oil
Electricity
Thermal oil
Hot water
Wood chips

Direct and indirect heating systems are available.

Operating Temperatures
Standard: 40–220°C
Special solutions: up to 300 °C

Temperature accuracy:
up to ±5 °C

Insulation
Insulation material: Rock wool, density 135 kg/m³
Thermal Insulation (U-value): 0.24 W/m²K

Oven wall insulation thickness:
40 – 80°C: 60mm
80 – 220°C: 150mm

Airflow:
5,000 – 100,000 m³/h

Control system:
Demand-controlled exhaust air regulation using a dedicated exhaust fan.

Standards DIN EN 1539
AMS 2750 (Aerospace Industry)

Additional oven solutions: 

Drying cabinets
Condensation dryers
Radiant ovens (gas catalytic / infrared)
Customized industrial oven systems

 

Chamber ovens

Chamber oven types

We integrate our chamber ovens seamlessly into your production process. The following configurations are available:

– Classic chamber oven
– Rack oven
– Tempering oven for customized temperature profiles
– Pass-through oven
– Tempering furnaces

 

Applications

Our chamber ovens are used in a wide range of industries, including:

– Aerospace industry
– Automotive industry
– Plastic and polymer industry
– Pharmaceutical industry
– Surface treatment industry
– Metal processing industry
– and many more

 

Door systems

Our chamber ovens are equipped with customized door systems. Depending on the workpiece dimensions and available installation space, we design hinged or sliding doors in either single-door or double-door configurations.

Technical data:

Typical usable chamber dimensions:
Length: 1.0–6.0 m
Width: 0.5–4.0 m
Height: 1.0–3.0 m

Other dimensions are available on request.

Heating Media:
Natural gas
Propane gas
Oil
Electricity
Thermal Oil

Direct and indirect heating systems are available.

Operating Temperatures:
Standard: 20–350 °C

Temperature Accuracy:
up to ±5 °C

Insulation:
Insulation material: Rock wool, density 135 kg/m³
Thermal insulation (U-value): 0.24 W/m²K

Oven wall insulation thickness:
40–80 °C: 60 mm
80–220 °C: 150 mm
220–350 °C: 200 mm

Typical airflow:
1,000–20,000 m³/h

Control system:
Demand-based process control.

Standards:
350°CDIN EN 1539
AMS 2750 (Aerospace Industry)

Chemical dosing Basic

Hardware


Our Chemical Dosing Basic system utilizes high-quality components from Prominent, Sera and JUMO. Magnetic diaphragm pumps provide highly accurate dosing, ensuring that only the required quantity of chemicals is supplied to the process.

– Multiple dosing pumps can be connected to a single IBC tank for efficient chemical distribution.

 

Standard Functions


– Measurement of conductivity, pH, and temperature
– Two-point calibration of pH probes via controller or transmitter
– Adjustable minimum and maximum setpoins
– Configurable minimum and maximum alarm limits
– Empty-level monitoring with pre-alarm and main alarm

 

Extended Functions


– Start-up lock based on time and/or cycle count
– Time-based or volume-based dosing pulses
– Cycle-controlled batch dosing with absolute control or current value limitation
– Time-controlled batch dosing
– Automatic co-dosing of additives in proportional to each chemical
– Manual fine adjustment of chemical dosing

Technical data

Pump type: Magnetic diaphragm pumps

Flow rates: 1 ml/h to 80 l/h

Operating pressure: 4-25 bar

Materials:
– PVDF
– PP
– PVC
– Stainless steel 1.4571 / 1.4404

Reproducibility: ±2%

Safety features: Integrated hydraulic overflow and vent valve

Protection class: IP66

Chemical dosing Master

Our principle: Safe and efficient chemical handling!

 

Hardware excellence:

For our systems we use high-quality components from Prominent, Sera, and Jumo.
Frequency-controlled pumps with dynamic speed adjustments allow for precise dosing and enable handling large volumes with the same pump.

Key features:
– One pump can serve multiple baths.
– Multiple pumps can connect to a single ibc tank.
– Recording of throughput quantities via measuring cells, clock generator signals gauging/time unit

 

Core functions:

– Measurement of conductivity, ph, and temperature
– Two-point calibration of ph probes via controller or transmitter
– Adjustable setpoints for minimum and maximum values
– Configurable thresholds for alarms (min/max)
– Real-time display of tank levels

 

Advanced features:

– Control for increasing or decreasing actual values via chemical addition or reduction*
– Start-up lock based on time and/or cycle count
– Dosing pulses managed by time or volume
– Compensation for fresh water supply in proportion to chemicals**
– Cycle-controlled batch dosing, either absolute or limited by actual value
– Time-controlled batch dosing
– Additives can be proportionally co-dosed with each chemical
– Manual fine-tuning with additional chemical inputs

 

Data logging / analysis

All relevant data is logged and stored on an SQL server for in-depth analysis. The system supports exporting data for further evaluation. Key data points are:
– Consumption and wastewater* metrics by bath, chemical, and water** usage
– Time-based reporting (hourly, daily, weekly, monthly, yearly) through Power BI
– Connectivity via MES server or standalone systems at lab workstations***

 

*Requires specific hardware for active draining.
**Applicable if water supply measurements are installed.
***MES server integration or direct control connection required (routing).

Technical data:

Pumps:
– Frequency-controlled motor diaphragm pumps for high accuracy and performance
– Magnetic diaphragm pumps for small but precise additive dosing

Flow rates: 1 ml/h to 1000 l/h

Pressure range: 4 to 25 bar

Materials:
– PVDF
– PP
– PVC
– Stainless steel 1.4571/1.4404

Reproducibility: ±2%

Safety: Integrated hydraulic overflow and vent valve

Protection class: IP 55 and IP 66

Spray pre-treatment systems

We distinguish between the following system types:

 


Single-chamber systems:


Designed for customers with limited space, single-chamber systems offer a compact yet efficient solution.
The basic model features two baths and a final rinse spray ring, making it ideal for pre-treating steel, aluminum, and galvanized components for indoor applications. For clients with higher performance demands, we offer custom multi-tank configurations capable of achieving outdoor-grade treatment for aluminum.
Additionally, these systems can process steel and galvanized steel components in parallel, though the capacity is limited to 3–4 batches per hour. Narrow parts can be treated efficiently, accommodating up to three racks per batch.


Multi-chamber systems:


Multi-chamber systems allow up to four process steps per chamber, provided the cycle time permits.
In addition to the traditional sliding door, we have developed an innovative double-wing door that minimizes drag-out, prevents standing water, and eliminates microbial issues. This design also supports the installation of spray rings on the doors, enabling thorough internal cleaning of aluminum profiles. This process enhances surface treatment quality and extends the longevity of the passivation layer. In terms of energy efficiency, multi-chamber systems stand out as the optimal choice for spray pre-treatment, especially when combined with our advanced chemical dosing systems.


Inline systems:


Inline systems share the core functionality of multi-chamber systems but are designed without doors, with each chamber dedicated to a single process step. These systems are recommended for low throughput or when handling individual components, especially when cycle times are under three minutes.


Multi-lane systems:


To double production capacity, we offer dual-lane systems, available in both chamber and inline configurations. These systems can operate either in parallel or cross-mode processes. In parallel mode, both lines run the same processes simultaneously. In cross-mode, one lane executes Process A while the other performs Process B within the same chamber system, maximizing flexibility and productivity.

Technical data:

Part dimensions:
Length: 1m – 8m (custom sizes available)
Width: 0.2m – 2m
Height: 1m – 3.5m

Number of process steps:
Typically 1–12 steps within 1–7 chambers

Core processes:
– Degreasing
– Rinsing
– Etching (acidic and alkaline for aluminum)
– Passivation

Dwell times:
From 10 seconds to 10 minutes

Materials:
Stainless steel 1.4307 and 1.4404

Airflow rates:
2,000 – 20,000 m³/h

Conveyor systems:
– P+F in tact systems
– Inline systems with speeds of 0.5 – 4 m/min
– Manual operation for single-chamber systems

Bath maintenance systems:
– Bag filters
– Candle filters
– Oil separators
– Coalescence separators
– Ultra- and nanofiltration

Wastewater treatment systems:
– CP systems (chemical/physical)
– Evaporator systems (closed-loop)
– Flocculation systems

Immersion pre-treatment systems

Manual systems:


Manual immersive systems are ideal for small-scale operations. Using a compact crane, individual parts or baskets can be dipped from one bath to the next, with no limit on the number of steps involved.


System configurations:


In addition to classic linear configurations, we offer u-shaped and z-shaped layouts.
U-shaped systems typically feature two separate lines connected by transfer zones, while z-shaped systems consist of two or three parallel bath rows equipped with three-axis transfer units.
These configurations are highly compact, maximizing floor space efficiency.


Energy optimization:


Our immersive systems are engineered for maximum energy efficiency. High-performance pumps with frequency-controlled adjustments deliver power only when needed. The ventilation system ensures proper air exchange while recovering heat from exhaust air to minimize energy loss.


Circulation methods:


Circulation of the bath medium depends on the process and may involve:
– Air circulation using side-channel blowers
– Eductors to amplify pump flow
– Agitators for enhanced mixing


Lid systems:


Automatic lids, often overlooked during planning, are crucial for energy savings by reducing evaporation losses – similar to using a lid on a cooking pot.
We offer a variety of lid systems to meet your specific needs.


Air scrubbers:


Certain processes require air scrubbers to prevent aerosol emissions and protect the environment.

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Technical data:

Component dimensions:
Length: 1m–12m
Width: 0.2m–2m
Height: 1m–3.5m

Process steps:
Typically between 3 and 20

Processes:
– Degreasing
– Rinsing
– Pickling
– Passivation
– Dip coatings
– Drying

Dwell times: From 1 second to 30 minutes

Materials:
Stainless steel 1.4307 and 1.4404
Plastics

Air volumes: 5,000–50,000 m³/h

Transfer systems:
Automated, with 1–5 hangers per transfer frame
Automatic loading and unloading available

Positioning accuracy (X, Y, Z axis): +/- 1mm

Bath maintenance systems:
– Bag filters
– Candle filters
– Oil separators
– Coalescence separators
– Ultra- and nanofiltration

Wastewater treatment:
– CP systems (chemical/physical)
– Evaporator systems (closed-loop)
– Flocculation systems

Manual systems

Flexibility:

Manual systems are an excellent complement to automated spray pre-treatment systems, particularly for job coaters. Oversized parts can be processed separately on a secondary track, ensuring efficient handling.

From large to gigantic!

For components like gas turbines or high-pressure compressors, automation is impractical. These bulky items are challenging to move, which is why our multifunctional cabins are an ideal solution. These cabins not only handle cleaning but can also be used for drying and painting. For more details, see our painting cabins section.

Immersion process:

A specialized version of the immersion pre-treatment system is available for small-scale operations. Using a compact crane, individual parts or baskets can be dipped from bath to bath. The number of process steps is unlimited, offering unparalleled flexibility.

Technical data:

Dimensions:
Length: 2m–35m
Width: 2m–10m
Height: 3m–5m

Lighting:
LED, dimmable

Integrated high-pressure cleaners with 180 bar
Hose reels and interchangeable nozzles

Wall material: 1.4307

Airflow: 5,000–50,000 m³/h

Floor conditions: Pits, grating floors, or smooth floors with sump

Conveyor technology integration is available

Multifunctional cabins

Full flexibility:

With spacious interiors and zone-controlled air supply and exhaust systems, we address all customer needs with maximum flexibility.

 

Optimized workflow:

Thanks to its multifunctional capabilities, large workpieces can be washed, dried, painted, and force-dried in one position, eliminating the need for part movement.

 

Maintenance-friendly:

Even the largest booths are designed for optimal maintenance accessibility, ensuring ease of operation and minimal downtime.

 

Compliance:

These cabins from e. Luterbach ag are also designed in accordance with the current en standards.

 

Energy efficiency:

Energy efficiency innovations are pivotal for reducing operating costs, even in oversized applications.

 

Heavy-duty capacity:

Heavy loads can be safely and precisely prepared for the painting process with advanced conveyor and handling systems.

 

Fast switchover:

Switching between modes can be completed in just minutes, thanks to our specialized dual filtration system.

Technical data:

Core functions:

– High-pressure washing
– Flash-drying
– Painting
– Flash-off
– Paint drying
– Standby

Core components:
– Fans
– Filtration systems
– Heating systems
– Heat recovery systems
– Humidification systems
– Cooling / dehumidification systems
– Cleaning equipment

Materials:
Galvanized steel
Painted steel
Stainless steel (1.4307 and 1.4404)
Plastics (e.g., PPs)

Airflow rates:
2,000 – 260,000 m³/h

Temperature range: Up to 60°C

Filtration systems:
– Coarse dust filter ISO coarse 40% (G3)
– Machine protection filter ISO ePM10 50% (M6)
– Fine filter ISO ePM1 70%
– HEPA filter up to H14
– Air scrubber

Heating options:
– Electric
– Heating water
– Gas (direct/indirect)
– Oil (indirect)
– Thermal oil

Heat recovery systems:
– Static plate heat exchangers (up to 65% efficiency)
– Rotary heat exchangers (up to 85% efficiency)
– Sorption regenerators (up to 85% efficiency, including latent heat/moisture recovery)
– KVS systems (up to 45% efficiency)
– Heat pumps

Humidification options:
– High-pressure humidification with osmosis water
– Ultrasonic atomization
– Steam humidification