page 44 of 58
Replacing diaphragms and valves
+
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
.
Wait five seconds
after isolating the
equipment from AC power 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
.
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Take adequate precautions to protect people from the
effects (e.g., in case of inhalation or skin contact) of
dangerous substances that may have contaminated
the pump and may be released upon disassembly. En-
sure that the maintenance technician is familiar with
the safety procedures which relate to the products pro-
cessed by the pumping system.
Use appropriate protective clothing, safety goggles
and protective gloves.
+
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.
+
Allow sufficient cooling of the pump before starting
maintenance. Drain condensate, if applicable.
+
Vent the pump and isolate it from the vacuum sys-
tem before you start maintenance.
