Airtherm – for Spray Guns and Automatic Machines, also ATEX
Heats the atomizing air directly at the spray gun instead of in the line – finer atomization at lower pressure, less overspray, shorter drying time.
Request a quote by e-mailAtomizing air constantly at 20–100 °C – right at the atomizer, instead of cooling below 5 °C. The Airtherm replaces the air hose of your existing spray gun and heats the compressed air as a flow-through heater where it is needed: at the spray head. For manual gun, automatic surface spraying machine, spraying robot and Airmix – as standard or EX version (equipment category 2 according to the brochure KUNDE: confirm approved zones). Not a hall or room air heater: the Airtherm heats compressed air for atomizers only.
20–100 °C KUNDE: clarify — data sheet controller states "up to max. 95 °C"
Family "Compressed-air heating" is the designation used on the current home page. KUNDE: confirm product family assignment — the concept alternatively proposes "Heated application" (Airtherm + WarmUp)
Key figures
- Control range ¹
- 20–100 °C
- Air pressure
- 1–8 bar
- Air volume
- up to 500 NL/min
- Ex marking (EX version)
- II 2 G / II 2 D
¹ Control range: the brochure 01/2022 p. 2 states 20–100 °C, the data sheet 01/2024 p. 2 states “up to max. 95 °C” for the controller. KUNDE: which value applies?
² 500 VA is the rated power of the headpiece with heating cartridge, max. 750 W (3.5 A) is the controller output.
Solves your problem if …
- … the atomizing air at the gun head gets cold and the paint atomizes poorly, forms runs or needs more pressure than necessary.
- … you work with a manual gun, automatic surface spraying machine, spraying robot or in the Airmix process.
- … you paint in a hazardous area – the EX version carries II 2 G / II 2 D, equipment category 2 according to the brochure. KUNDE: confirm approved zones
- … your line needs up to 500 NL/min at 1–8 bar.
- … you run paints with a higher solids content or need to reduce VOC.
Not the right choice if …
- … you want to heat hall, room or duct air – the Airtherm is not built for that.
- … you need more than 100 °C air temperature.
- … you need air volumes well above 500 NL/min per atomizer.
Not sure whether your gun, your medium or your zone is suitable?Have suitability checked
How the Airtherm works
The problem: Compressed air expands at the atomizer and cools down in the process. VISECO describes it like this: "The compressor air cools the spray head of the spray gun to below 5°C in some cases. This makes the paint more viscous and harder to atomize." The brochure adds: "below the dew point" – i.e. condensation at the spray head.
The solution: "The Airtherm functions as a flow heater for compressed air. It is attached directly to the atomizer and replaces the actual compressed air line. The warm air can thus heat the atomizer and the corresponding nozzle constantly and without loss."
Three components: 1. Controller with mains cable (230 VAC) and PT100 sensor input – set the set point, done. 2. Airtherm hose – in one hose: air hose, sensor line and 230 V supply line. Length freely selectable. KUNDE: confirm the structure of the hose package — from the brochure illustration only 3. Headpiece with heating cartridge and connection for the spray gun (G 1/4"), protection rating IP 65.
The temperature is regulated at the headpiece, not centrally in the line. KUNDE: confirm the measuring point of the PT100 sensor — headpiece or gun outlet?
What heated atomizing air does:
- low atomizer pressure
- less material and air consumption
- low disposal costs
- low noise level
- shorter drying times due to finer atomization
- VOC emissions can be significantly reduced
- more coating thickness per operation
- significantly higher runner limit
- use of paints with a higher solids content
- constant working temperature in any environment
Manufacturer figures from the brochure (as of 01/2022, without stated measuring conditions): "air consumption reduced by up to 180 l/min", "material savings of up to 30%", "noise level reduced by up to 8 dB". KUNDE: state measuring conditions or leave the figures as manufacturer's claims
ASSET FEHLT: Schematic drawing of the Airtherm hose (air, sensor line, 230 V in one hose) — the unique selling point is today only a photo caption
ASSET FEHLT: Spray pattern comparison cold/warm as a web image — available in the brochure p. 1 as a photo
Applications
Named by VISECO:
Automatic surface spraying machines
Integration of the Airtherm in the machine; additional heating for the atomizing air without modifying the material side.
Spraying robots
Installation at the robot atomizer; hose length freely selectable.
Manual spray gun applications
As additional heating: only the air hose is replaced.
Airmix process
Heated atomizing air with air-assisted airless.
De-icing at LNG filling stations
KUNDE: application description and reference — today only a keyword
Temperature control of breathing air in the painting area
KUNDE: application description; breathing-air approval?
Industries: KUNDE: confirm industries — the website names none; derived from 02-produkte: industrial painting, automotive suppliers, wood/furniture, plastics, plant engineering/integrators
Technical data Airtherm
As of data sheet 09/2023 (DE) / 01/2024 (EN). Separated by component because the protection ratings differ.
| Article no. | 140-112-x-x (standard) · 140-32-x-x (EX version) KUNDE: meaning of "x-x" — hose length/version? |
|---|---|
| Temperature control range | 20–100 °C KUNDE: the data sheet 01/2024 p. 2 states "up to max. 95 °C" for the controller — which value applies? |
| Operating voltage | 230 VAC / 50 Hz |
| Rated power | 500 VA — rated power of the headpiece with heating cartridge |
| Air pressure range | 1–8 bar |
| Air volume | up to 500 NL/min |
| Connection thread | G 1/4" |
| Protection rating, headpiece | IP 65 |
| Ignition protection type (EX version) | Ex e, temperature classes T3, T4, T5 |
| Ex marking gas (EX version) | Ex II 2 G Ex eb IIC T3, T4 or T5 Gb |
| Ex marking dust (EX version) | Ex II 2 D Ex tb IIIC T 200, 135 or 100 °C Db |
| Approval, EX version | PTB 03 1051 X KUNDE: valid certificate number and certificate as PDF — number differs from third-party listing |
| Airtherm hose | Length freely selectable; contains air hose, sensor line, 230 V supply line KUNDE: confirm the structure of the hose package — from the brochure illustration only |
| Scope of delivery | Controller with mains cable · control cable · connection housing · Airtherm hose · headpiece with heating cartridge · connection for spray gun KUNDE: confirm scope of delivery as a list |
| Mains connection | 230 VAC, 150 mA |
|---|---|
| Fuse protection for supply line | max. 6 A |
| Output for air heater | max. 750 W (3.5 A) — controller output, not the rated power of the headpiece |
| Protection rating | IP40 |
| Protection class | Protective earth connection (Class 1) |
| Permitted ambient temperature | 0–50 °C |
| Permitted relative humidity | max. 90 %, non-condensing |
| Sensor input | PT100 |
| Dimensions (L × W × H) | 20 × 13 × 8 cm |
| Weight | 2.0 kg |
Not specified (on request): pressure drop across heater and hose, heat-up time, max. air volume at 8 bar, interface to the line control.
Versions and options
| Version / option | Article no. | Difference |
|---|---|---|
| Airtherm standard | 140-112-x-x | For areas without Ex requirements |
| Airtherm EX | 140-32-x-x | II 2 G / II 2 D, equipment category 2 according to the brochure KUNDE: confirm approved zones, T3/T4/T5 |
| Hose length | – | Freely selectable KUNDE: state available standard lengths |
| Twin arrangement | – | Two Airtherm units on one gun with separate atomizing and fan air connections |
| Built-in version Airtherm 3.3 / 4.1 | – | Named in the UL certificate; according to the 2008 operating manual not explosion-proof KUNDE: is the built-in version still offered? article no.? |
Accessories and spare parts (heating cartridge, PT100 sensor, adapters for guns, brackets): on request
Version not listed?Request special length / special voltage
Existing customer?Request spare part or operating manual
In the system with …
Hot spraying system: "Airtherm together with heated material hose and double diaphragm pump" – warm air and warm material from a single source. → WarmUp – heated airless high-pressure hose KUNDE: is the "heated material hose" in the hot spraying system the WarmUp?
Heated airless hose
Warm material to go with the warm air: the hot spraying system.
Paint booth filters
Less overspray, fewer filter changes.
Fewer filter changes: "An added advantage of the lower spray losses is that the load on the intake filter is reduced so that it needs to be changed less often." → Andreae paint booth filters
Two Airtherm units on one gun: atomizing and fan air heated separately.
Certificates and standards
UL Recognized Component for the USA and Canada
Certificate 20170619-E322734, issued 19 June 2017 to VISECO GmbH, Aichach, for "PTC Air Heater Model: Airtherm 3.3, Airtherm 3.3.X, Airtherm 4.1 and Airtherm 4.1.X", standards UL 499 (Electric Heating Appliances) and C22.2 No. 72-10 (Heater elements). Wording on the page: UL Recognized Component – not "UL-certified device" (according to UL, Recognized Components are intended for installation in tested end products). KUNDE: UL Follow-Up Service active?
ATEX (EX version)
Marking Ex II 2 G Ex eb IIC T3, T4 or T5 Gb · Ex II 2 D Ex tb IIIC T 200, 135 or 100 °C Db. Equipment category 2 according to the brochure. KUNDE: confirm approved zones Approval PTB 03 1051 X. KUNDE: ATEX certificate as PDF and binding number — without the document no download link, no hasCertification
ISO 9001:2015 (company)
DIN EN ISO 9001:2015, TÜV SÜD, reg. no. 12 100 34086 TMS, valid until 8 July 2029, scope "Development, manufacture and sale of heated spray equipment and components for coating technology" (certificate dated 30 June 2026).
Regulatory context for your line (not a VISECO certificate): According to DGUV Information 209-046 (German accident insurance guidance), the interior of spray booths and cabins is zone 2 or zone 1 depending on concentration – the EX version of the Airtherm is marked for category 2.
Downloads
- Airtherm · Data sheet
- Airtherm · Datenblatt
- Airtherm · Brochure
- Airtherm · Prospekt
- Airtherm · UL 2017
- ISO 9001 · Zertifikat
ATEX certificate, EX version: on request. Operating manual Airtherm (DE/EN): on request. CE declaration of conformity: on request. All files without registration, direct link.
Frequently asked questions about the Airtherm
My compressed air is too cold – can I heat the atomizing air?
Yes. That is exactly what the Airtherm is built for. It replaces the air hose of the existing spray gun and heats the compressed air as a flow-through heater directly at the atomizer to the set point (control range 20–100 °C). The cooling of the spray head below 5 °C that compressor air otherwise causes is eliminated.
What does heated atomizing air do for painting?
According to VISECO: lower atomizer pressure, less material and air consumption, finer atomization and therefore shorter drying times, more coating thickness per operation, a significantly higher runner limit and a constant working temperature in any environment. The brochure (01/2022) states as manufacturer's figures up to 30 % material savings, up to 180 l/min less air and up to 8 dB less noise – measuring conditions are not stated there.
Does the Airtherm reduce VOC emissions?
VISECO lists "VOC emissions can be significantly reduced" and "use of paints with a higher solids content" as advantages: because warm air lowers the viscosity, the material needs less thinner and less pressure. How much that amounts to in your process depends on the paint. KUNDE: are there measured values from customer lines?
For which Ex zone and which temperature class is the Airtherm approved?
The EX version (article no. 140-32-x-x) carries Ex II 2 G Ex eb IIC T3, T4 or T5 Gb and Ex II 2 D Ex tb IIIC T 200, 135 or 100 °C Db. Equipment category 2 according to the brochure. KUNDE: confirm approved zones The temperature class depends on the set air temperature. The standard version (140-112-x-x) is not intended for hazardous areas. KUNDE: assignment of temperature class ↔ set point and certificate PDF
Where is the Airtherm installed – at the gun, in the robot, in the automatic machine?
Directly at the atomizer: the headpiece with heating cartridge sits at the air connection of the gun (G 1/4"), the Airtherm hose replaces the previous air hose, the controller stands outside. VISECO names manual guns, automatic surface spraying machines, spraying robots and Airmix. The hose length is freely selectable.
Does the Airtherm fit my existing spray gun?
According to the brochure, "all that needs to be done … is to simply replace the air hose of the existing spray gun by the Airtherm air hose"; connection thread G 1/4". There is no list of approved guns or adapters. KUNDE: compatibility list / adapters Tell us the manufacturer and type of your gun – we will check the connection.
Is the built-in version Airtherm 3.3 explosion-proof?
No. The operating manual of the built-in version Airtherm 3.3 (as of 2008) explicitly excludes use in zones 0 to 2. Only the EX version 140-32-x-x is explosion-proof. KUNDE: publish this question only if the built-in version 3.3/4.1 is still offered
Inquiry Airtherm
You will receive a technical reply or a quote from VISECO in Aichach, Germany. KUNDE: response time and contact person (name, function) — not documented today
So that we can size the system without further queries, please tell us:
- Application (manual gun / automatic machine / robot / Airmix)
- Ex zone (none / 1 / 2) and temperature class
- Air volume (NL/min) and pressure (bar)
- Target air temperature (°C)
- Gun/atomizer (manufacturer, type, connection)
- Hose length (m)
- Number of atomizers
- 230 V mains available / line interface
- Quantity and time frame
- Company, contact person, phone
KUNDE: confirm which details VISECO really needs — concept question 8
Helpful as attachment: photo or type designation of the gun or atomizer, sketch of the line with hose route.
How to reach us
Subject and checklist are already filled into the mail.
We call back within your time window.
No form, no registration — direct download.
Availability KUNDE: office hours
E-mail address as plain text next to it: kontakt@viseco.de (if no mail client is set up – copy the fields above). Inquiries in English or German.
