Ashcroft E Инструкция по установке и обслуживанию - Страница 8
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EPL
Ignition temperature
Db
Minimum ignition temperature
for dust clouds T
Minimum ignition temperature
with dust layers T
For device types with every angle connection, the dust support surface may change depending on
the position selected by the user. These changed surfaces must be taken into account in the user's
ignition hazard assessment. For the device type with a compression fitting, the stem length "S" is
adjustable. If part of the stem is not located within the process, the derived temperatures must be
determined at the protruding stem, as this will increase the dust contact area. These temperatures
must also be included in the user's ignition hazard assessment.
For mounting locations that allow weather influences, these influences must be minimized by suitable measures. To
avoid additional heating, the devices must not be exposed to any external heat source during operation! Convection
heat from the direct environment of the devices must also be avoided.
The devices must not be operated in potentially explosive areas of a plant in which an explosive
mixture of gases and dusts is present in the atmosphere.
Labelling:
II
2G
2D
Ex h
IIC
IIIC
T6...T1
T85°C...T450°C
Gb
Db
X
Permissible max. surface temperature
dusts
T
max
[°C]
cloud
T
max
[°C].
5mm
Ex marking according 2014/34/EU
Conformity mark
Explosion protection mark
Group II equipment is intended for
use in locations with explosive gas
atmospheres, excluding mine gas
and/or dust from hazardous mining
operations.
Equipment group for gases and vapors in
which an explosive atmosphere may
occasionally occur during normal operation.
Equipment group for dusts in which an
explosive atmosphere may occur during
normal operation or for a short period.
Marking according to the equipment protection level
for non-electrical equipment in potentially explosive
atmospheres
Suitable for gas atmosphere IIC
Suitable for combustible suspended solids, non-conductive
and conductive dust
Maximum surface temperatures which are mainly dependent on the
operating conditions
Equipment protection level for gases containing all potential ignition sources that are
effective, which may occur during normal operation, rare and expected malfunctions.
Equipment protection level for dusts containing all potential ignition sources that are
effective, which may occur during normal operation, rare and expected malfunctions.
Special operating conditions must be observed and can be found in the operating instructions.
= 2/3 T
cloud
= T
- 75 K
5 mm
2G
II
Ex h
2D
page 8 of 19
In case of a
malfunction, the
maximum medium
temperature may be
considered as the
surface temperature to
be determined.
Ex marking according
ISO 80079-36 / 80079-37
IIC
T6...T1
Gb
IIIC
T85°C...T450°C
Db
X