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- 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
.
+
The pumps are
not suitable
for pumping dust.
Do not pump dust
.
•
Do not pump
substances which may form
deposits
in-
side 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 in-
creased temperatures even to the point of exceeding
the maximum permitted temperatures.
• Check the inlet and outlet of the pump, if there is a dan
-
ger 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 ”Replacing dia-
phragms and valves”, pg. 38). Inspect the pump cham-
bers regularly and clean if necessary.
•
Consider interactions and chemical reactions of
the pumped media.
Ensure that the materials of the
pump’s wetted parts are compatible with the pumped
substances, see section ”Technical data”, pg. 24.
When changing the substances pumped, we recom-
mend purging the pump with air or inert gas prior to
changing the pumped media. Purging the pump will
pump out residues and it will reduce the possibility of
reactions of the pumped substances with each other
and with the pump’s materials.
