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04.06.2019
chem-proof Ex roof fan
SPARK-CHEM/Ex
2. Application
SPARK-CHEM/Ex chem-
explosion
proof stand fans
are intended for use in areas of explosion
risk, where
explosive
atmosphere
, (i.e. mixture of
flammable substances in form of gas and va-
pour with the air, whereby after ignition
– in atmospheric conditions
– the burning mass would
expand within the whole non-burning mixture)
is likely to occur. Additionally, the appliance is
designed for transporting the air, contaminated with chemically aggressive media, (see Table of
chemical resistance on pages: 11
– 14).
The forwarded air must be dry, of dustiness not exceeding 0,3 g/m
3
, without viscous contami-
nants and of maximum temperature up to 40
C.
According to
the ATEX 94/9/EC Directive and
EN ISO 80079-36 the
device carries the level
of
protection
:
“
HIGH
” –
as a device classified
for
Group
II,
Category
2,
and it can work in
areas where explosive atmospheres are possible to occur.
The fan
can be applied in zo-
nes
1
,
2
(
G
).
The appliance is marked on the nominal data plate:
II 2 G c Ex e II T3
Marking
of
the
operational
conditions
of
the device
:
group / category / hazard / class
.
marking for explosion proof properties of the appliance,
group II
– the device
is
designed
for
on-ground work,
in factories,
in areas
of
explosion
hazard,
but this cannot be methane hazard
(
firedamp
)
neither carbon dust occurrence,
category 2
– the device is designed
for application in areas where
explosive atmosphe-
res are likely to occur
,
gas hazard G
,
“
c
” – refers the protection from ignition –
constructional protection
,
“
b
” – protection by means of controlling the ignition sources,
Ex
– mark of the electrical device –
constructed
and
tested according
to the European Stan-
dards for work in areas of explosion hazard,
execution
“
e
” – type of construction of the motor (a motor of increased safety)
gas explosion
group
II
–
occurring
in on-ground factories
– the fans are constructed accor-
ding to
the PN-EN 14986:2009
, whereby they can be applied for gases in explosion groups
IIA
and
IIB
and
hydrogen
,
temperature
class T3
–
the surface
temperature
of any
part
of the
appliance should
not
ex-
ceed
200ºC
(during the normal operation). The device can be used safely
in explosive at-
mospheres
belonging to temperature classes
T1
,
T2
,
T3
.
3. Reservations of Producer
A
.
Manufacturer accepts no liability
for any consequences following from the operational use
that is in contradiction to the purpose of application.
B
.
Installing of
any additional elements not belonging to the normal device structure (
or acces
-
sory set) is not acceptable.
C
.
Do not undertake
any structural changes or constructional modifications on the device on
one
’s own.
D
.
Protect the appliance’s housing from mechanical damage.
E
.
Prior to
installing
check the load carrying capacity
of the building structure
where the device
will be mounted. Unsure mounting could cause hazard to personnel/people in vicinity and
effect in damage of the device.
