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. 22)
.
➨
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. 49). Inspect the
pump chambers 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
Summary of Contents for MD 1
Page 27: ...page 27 of 72 MD 1 MD 1 C US pump with dual voltage motor 4 9 8 7 5 6 3 2 1 2 1 2 1 ...
Page 28: ...page 28 of 72 MD 1 VARIO SP Ensure sufficient venting of the pump 9 5 6 7 10 ...
Page 53: ...page 53 of 72 1 2 1 2 3 15 mm 4 6x size 2 2x 1 ...
Page 54: ...page 54 of 72 4 5 6 20696264 Clean ...
Page 55: ...page 55 of 72 Replacing the diaphragm 7 8 9 1 2 ...
Page 56: ...page 56 of 72 3 10 11 12 Pay attention to number of washers ...
Page 57: ...page 57 of 72 13 14 15 1 2 Pay attention to number of washers ...
Page 58: ...page 58 of 72 Replacing the valves and assembling the pump heads 16 17 18 4x ...
Page 60: ...page 60 of 72 22 23 16 15 24 1 2 Maintain all pump heads in the same way 15 16 mm size 2 2x ...
