INERT GASUV Curing System

Atmospheric oxygen reduces the effectiveness of UV curing in some inks and coatings.
The inert gas curing system can be used to overcome this. Inert gas (usually nitrogen) isused to purge the curing chamber of oxygen, increasing production speeds significantly.
The benefits of inert gas curing• Allows curing of low migration inks for foodgrade applications• Improves the curing speed of all free radical inks
• Enables curing of free radical silicone coatings• Reduces ink odour

Choice of systems
Constant PPM System
A sensor within the curing chamber determines theoxygen concentration in parts per million (ppm).
The operator can set the desired maximum oxygen level
and the system automatically adjusts the flow of purging

nitrogen to achieve better than the desired oxygenlevel. The HMI displays live oxygen levels for each lamp,
together with any relevant warnings and alarms.
Constant Flow System
A sensor on the nitrogen flow valve measures the flowrate of purging nitrogen. The system automatically adjusts
the flow to the level set by the operator, irrespective ofpress speed or oxygen level. Oxygen ppm level is still
displayed on the touchscreen for the operator to viewand control the process.

Process Control package
In accordance with EC Regulation No. 2023/2006 on“good manufacturing practice for materials and articles
intended to come into contact with food”, the GEW
Process Control package includes a means of recording
live system curing performance data on a job by job basis.
Data appropriate to the UV system configuration isrecorded such as oxygen level (ppm), UV intensity andany warning and fault conditions that occur during
the logged period.
Customisable logged data can be transferred to thecustomer as csv files on a weekly basis. Other datatransfer options may be available on request, pleasecontact your sales representative for more information.

gewuv.com

Inert gas installation
All parts are normally serviceable from the operator side of the machine via a removable sealed quartz window.

Effect of oxygen
concentration on curing
0.2
100% UV power

Cure quality increasing

0.4

60% UV power

0.6
0.8
1.0210,000

650

510

150

Oxygen concentration level (ppm)

18235746KEY ELEMENTDETAILS

UV lamphead

Compatible with: E2C - up to 60cm / E4C - up to 130cm / NUVA2 - up to 250cm / LED - Up to 250cm.

2Inert gas curing chamber

Available with water-cooled roller or inline water-cooled heatsink.

3

Multi-point UV monitors (optional) Enables continuous monitoring of UV intensity. Measurements are displayed on the touchscreen.

4

Inert gas control box

All-electronic control to monitor and regulate inert gas flow.

5

Oxygen analyser

Compact oxygen sensor mounted near chamber for rapid response. Precision pump controls sample rate.

6Inert gas feed

Inert gas feed to control box.

7HMI touchscreen

GEW UV process control displays real-time oxygen concentration for each chamber.

8Rhino Power Electronics

Ultimate efficiency electronic control is used to power the UV lamp and manage the inert gas system.
IGCS-UK/V4

1Head Office
GEW (EC) Limited, Crompton Way, Crawley RH10 9QR, UK
UK +44 1737 824 500
E sales@gewuv.com

Germany +49 7022 303 9769
W gewuv.com

USA +1 440 237 4439