FLEX – Flame Arresters for Solids
Explosion Protection · Flame Arresters for Solids
Manufacturer: 
FLEX II R is a flameless explosion venting device that safely relieves and releases explosions developing inside a protected device located in an explosive environment. It combines the VENT PRO explosion relief device with a welded FLEX II body fitted with a flame filter: it captures the explosion energy (flame and pressure) and cools the exhaust gases down to a level no longer dangerous to technology or to people nearby. It includes an opening indicator for electronic signaling of the VENT PRO activation. Manufactured to EN 16009 and European Directive 2014/34/EU.
Technical data
- Equipment group
- II
- Explosive atmosphere
- D
- Equipment category, indoor/outdoor
- 1 D 3G / 3G D
- Zone (indoor)
- 20
- Zone (outdoor)
- 2, 22
- Max. Kst (non-metallic dust)
- ≤ 312 bar·m/s
- Ambient temperature
- -40 °C to 60 °C
- Operating temperature
- -40 °C to 100 °C (optional up to 240 °C)
- Storage temperature
- -10 °C to 40 °C
- Pred,max
- ≤ 2.5 bar
- Body
- Structural steel with RAL 9005 (black) powder-coated finish; other colors on request; optional all-stainless design
- Flame filter
- Stainless steel
- Explosion venting device
- Stainless steel, integrated into the FLEX with adhesive, includes opening indicator
- Flange gasket
- EPDM, supplied with the FLEX
- Fasteners
- Screws ISO 4017 – 8.8, nuts ISO 7040 – 8, washers ISO 7089, galvanized (stainless steel A2-70 for the all-stainless version)
- Standard
- EN 16009 and Directive 2014/34/EU
