PROTEGO® Flame Arresters
Choose the right Flame Arrester here: Go to Flame Arresters
Working principle of Flame Arresters
Flame arresters are designed to allow the flow of gases, liquids, etc. and to prevent flame transmission.
PROTEGO® Flame Arresters are composed of individual FLAMEFILTER® (flame arrester discs). Several FLAMEFILTER® plus spacers and an enclosing cage form the flame arrester.
The FLAMEFILTER® is made of wound corrugated metal strips. The principle of flame quenching in small gaps is applied in PROTEGO® end-of-line flame arresters and PROTEGO® in-line flame arresters.
When a mixture ignites in a gap between two walls, the flame spreads towards the non-combusted mixture. The expansion in volume of the combusted mixture pre-compresses the noncombusted mixture and accelerates the flame. By heat dissipation in the boundary layer “s”, transferring it to the large surface of the gap-length compared to the gap-width “D” and cooling-down the product below its ignition temperature the flame is extinguished.
The gap width and the gap length of the flame arrester disc determines its extinguishing ability.The narrower and longer the gap, the greater the extinguishing effectiveness. The wider and shorter the gap, the lower the pressure loss. The optimum solution between the two conditions is determined by experiments.
Video "FLAMEFILTER® stops the flame": watch video
Combustion Processes
The right device for all applications
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) watch video
- 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
Explosion groups
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.
PROTEGO® Flame Arresters in an ultra-maintenance-friendly design
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.

Special Flame Arrester Solutions
DMT Applications

Superheated Valves and Flame Arresters
Acetylene Applications

PROTEGO® DA-SB-AC - Detonation Flame Arrester
Ethylene Oxide Applications

PROTEGO® DA-SB-EO - Detonation Flame Arrester
Catalogue - Flame Arresters
Deflagration Flame Arresters, end-of-line and Vent Caps
Deflagration Flame Arrester, end-of-line
BE/AD
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
LH/AD
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
Deflagration Flame Arrester, short time burning proof, end-of-line
LH/AD-T
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
Deflagration Flame Arrester, endurance burning proof, end-of-line
BE/HR-E-IIB
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB
EB
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB
BE/HK-E-IIB3
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
BE/HR-E-IIB3
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
Vent Caps, end-of-line, without flame arrester unit
Deflagration Flame Arresters
FA-E
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
FA-CN-IIA & IIB3
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
FA-CN-IIC
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
FA-G
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
FA-I-V, FA-I-P
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
EV/VS, EV/VD
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
FA-I-FC
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
Detonation Flame Arresters
for stable detonation
BR/TS-80-IIB-P1,6
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB
BR/TS-80-IIB3
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
DA-G
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
DA-SB
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
DR/ES, DN 10 - 20
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC
DR/ES (series 2)
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
DR/ES-V
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
for stable detonation / for liquid detonation
LDA-WF(W)
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
EF/V-IIB3
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3
TS/P, TS/E & TS/W
группы взрывоопасности: IIA1 , D / IIA , C / IIB1 , C / IIB2 , C / IIB3 , B / IIB , B / IIC