Special Hazards - WIKA NS 100 Mode D'emploi

2. Safety

Special hazards

WARNING!
For hazardous media such as oxygen, acetylene, flammable
EN
or toxic gases or liquids, and refrigeration plants, compres-
sors, etc., in addition to all standard regulations, the appropri-
ate existing codes or regulations must also be followed.
With pressure gauges which do not correspond to a safety
version per EN 837 highly pressurised media might leak out
through the possibly bursting window in case of a component
failure.
For gaseous media and operating pressures > 25 bar a
pressure gauge with safety version S3 is recommended per
EN 837-2.
WARNING!
Residual media in dismounted pressure gauges can result in
a risk to persons, the environment and equipment.
▶
Ex marking
Ex marking per
2014/34/EU
A B
14
Take sufficient precautionary measures.
Ex marking per ISO 80079-36/37
C D E 1
II 2 G Ex
II 2 D Ex
WIKA operating instructions pressure gauge, model 2 per ATEX
2 3 4
h IIC T6 ... T1
h IIIC T85°C ... T450°C
5 6
Gb X
Db X