Bosch FAS-420-TT Series - Detonation Safety Barrier for Potentially Explosive Areas

24 en | Technical specifications Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
1
2
3
3
FAS-420-TM series
FAS‑ASD‑WS Water Separator for condensing water vapor
and collecting condensate from the pipe system
1 Water separator
2 Pipe system connection
3 45° pipe elbow
The FAS‑ASD‑WS Water Separator can be operated in a temperature range from 0°C to
+50°C. The sintered metal filter in the water separator has a pore width of 50µm and causes
an additional rough absorption of soil particles.The FAS-ASD-WS is supplied with an angle
support and PG cable glands. The 45° pipe elbows (4 units) must be ordered separately.
3.6.7 Detonation safety barrier for potentially explosive areas
Ex
FAS / FCS
1
6
7
2
3
4
5
> 1 m
> 1 m
Detonation safety barrier in the aspiration pipe system and if
necessary in the air-return pipe
1 Metal pipe
2 Detector module
3 Airflow sensor
4 Aspiration unit
5 Air-return pipe
6 Pipe system
7 Detonation safety barrier
Vapor/air and/or gas/air mixture ignition in the aspirating smoke detector may result in pipe
explosion or detonation. This depends on the composition, concentration, temperature, and
pressure of the flammable mixture.
The detonation safety barrier is a flame trap that is flame-proof in the face of pipe explosions
(deflagrations) and detonations.