page 18 of 76
sive atmospheres
.
Do not pump potentially explo-
sive atmospheres
with those pumps.
➨
Pumps
bearing the
”
`
”
mark on their rating plates
are
approved for the pumping of potentially explo-
sive atmospheres
according to their ATEX classifica
-
tion imprinted on their rating plate, but they are
not
approved for operation in potentially explosive at-
mospheres
Equipment marking (ATEX)”, pg. 24)
.
➨
The pumps are
not suitable
to pump any of the sub-
stances listed below.
Do not pump:
-
unstable substances
- substances which react explosively under
impact
(mechanical stress) without air
- substances which react explosively when being ex-
posed to
elevated temperatures
without air,
- substances subject to
auto-ignition
,
- substances which are
inflammable without air
-
explosive substances
.
➨
The pumps are
not approved
for operation below
ground.
Do not operate
the pump
below ground
.
•
Do not pump
substances which may form
depos-
its
inside the pump. The pumps are not suitable for
pumping substances which may form deposits inside
the pump. Deposits and condensate in the pump may
lead to increased temperatures even to the point of
exceeding the maximum permitted temperatures.
• Check the inlet and outlet of the pump, if there is a
danger of forming
deposits
inside the pump, e.g., in
the pump chambers (the pump chamber is the part
between diaphragm and head cover. See section “Re-
placing diaphragms and valves”, pg. 57). Inspect the
pump chambers regularly and clean if necessary.
