Flame Arresters

Flame arresters are subdivided into different types depending upon the combustion process and the place of installation. Our range of products covers the following:

• End-of-line Deflagration Flame Arresters (short time/endurance burning proof)
• In-line Deflagration Flame Arresters
• In-line Detonation Flame Arresters (stable/unstable detonation)

Special advantages of PROTEGO® Flame Arresters

• Modular design allows replacement of single FLAMEFILTER®
• Easy maintenance
• Low lifecycle cost

Deflagration Flame Arrester, end-of-line

In-line Flame Arrester

Different gases have different flame propagation capacities and are therefore categorized into explosion groups corresponding to their hazard level. The yardstick for this is the MESG = Maximum Experimental Safe Gap, a characteristic number measured in the laboratory for the flame propagation ability of the product. The MESG or standard gap width is the largest gap width between the two parts of the interior chamber of a test setup which, when the internal gas mixture is ignited and under specified conditions, prevents ignition of the external gas mixture through a 25 mm long gap, for all concentrations of the tested gas or vapour in air. The MESG is a property of the respective gas mixture [EN 1127-1]. NOTE: The test setup and methods are specified in EN 60079-20-1. The most explosive composition is close to the stoichiometric mixture of the gas/vapour-air mixture.

The table shows the categorization of substances into the respective explosion group corresponding to their MESG (IEC 79-1, EN ISO 16852).

This design prevents the FLAMEFILTER® discs from being damaged or misaligned during assembly or maintenance. These PROTEGO® Flame Arresters are particularly suited to applications where more frequent maintenance of the FLAMEFILTER® is required (e.g. where polymerisation or crystallisation result in heavy contamination) or for IIC applications. After installation, PROTEGO® units can be retrofitted at any time.