Ex Marking (Option); Supplementary Safety Instructions For Hazardous Areas - WIKA DMSU21SA Mode D'emploi

3. Safety

3.7 Ex marking (option)

DANGER!
Danger to life due to loss of explosion protection
Non-observance of these instructions and their contents may result in the loss
of explosion protection.
▶
Observe the safety instructions in this chapter and further explosion
protection instructions in these operating instructions.
▶
Observe the information given in the applicable type examination
certificate and the relevant country-specific regulations for installation and
use in hazardous areas (e.g. IEC 60079-14, NEC, CEC).
Ex marking per
2014/34/EU
II
Check whether the classification is suitable for the application. Observe the relevant
national regulations.

3.8 Supplementary safety instructions for hazardous areas

DANGER!
Leakage of system fill fluid in case of diaphragm rupture
In the event of a diaphragm rupture of both diaphragms, the system fill fluid
may enter the process medium and come into contact with non-wetted parts
of the instrument.
The effects of this fault on the safety of the system shall be assessed by the
operator.
▶
Please observe the flash point and ignition temperature of the system fill
fluid. See table below.
▶
Selection of suitable materials to exclude ignitable chemical reactions of
the components of the diaphragm seal system with the process medium.
Flash point and ignition protection of system filling
System fill fluid
KN2 Silicone oil Element 14 PDMS
Glycerine with FDA approval
KN7
KN17 Silicone oil PD5
1)
KN21 Halocarbon
WIKA operating instructions, model DMSU21A
Ex marking per ISO 80079-36/37
2 G Ex ia
Flash point
> 300 °C [572 °F]
> 170 °C [338 °F]
> 100 °C [212 °F]
n. a.
IIC T6 ... T3 Gb
Ignition temperature
n. a.
n. d.
> 420 °C [788 °F]
n. a.
15
EN