+
Please read section ”Replacing diaphragms and valves” com-
pletely before starting maintenance.
The pictures may show other versions of pumps. This does not change
the method of replacing diaphragms and valves.
➨
Never operate the pump if covers or other parts of
the pump are disassembled.
➨
Before starting maintenance,
disconnect the electri-
cal power cord (MD 1 with AC motor), respectively
the control line (MD 1 VARIO-SP)
.
Wait two minutes
after isolating the equipment from AC power or from
supply voltage to allow the capacitors to discharge.
➨
Ensure that the pump cannot be operated accidentally.
➨
Note
: The pump might be contaminated with the pro-
cess chemicals that have been pumped during opera-
tion. Ensure that the pump is decontaminated before
maintenance.
➨
Avoid the release of pollutants.
+
Never operate a defective or damaged pump
.
+
Check every motor capacitor regularly by measuring
its capacity and estimating its service life. Replace old
capacitors early enough to prevent a failure. The ca-
pacitors must be replaced by a trained electrician.
+
Take adequate precautions to protect people
from the effects of dangerous substances
that may have contaminated the pump and
may be released upon disassembly. Ensure
that the maintenance technician is famil-
iar with the safety procedures which relate
to the products processed by the pumping
system.
Use appropriate protective clothing, safety
goggles and protective gloves.
Replacing diaphragms and valves
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 ...