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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999198 / 29/09/2009
☞
Please read section ”Replacing diaphragms and valves” completely before
starting maintenance.
Partially the pictures show pumps in other versions. This doesn´t influence replacing diaphragms and
valves of the pump.
Tools required (metric):
- diaphragm key w/f 46
- open ended wrench w/f 14/17
- hex key size 4/5
- flat-bladed screw driver 2.5 mm
- flat pliers
Set of seals MD 1C
(4 diaphragms, 8 valves, diaphragm key) ...................................................
696828
Replacing diaphragms and valves
All bearings are encapsulated and are filled with long-life lubricant. Under normal
operating conditions, the pump is maintenance free. The valves and diaphragms are
wear parts. If the rated ultimate vacuum is no longer achieved or in case of increased
noise level, the pump interior, the diaphragms and the valves must be cleaned and
the diaphragms and valves must be checked for cracks or other damage. Depend-
ing on individual cases it may be efficient to check and clean the pump heads on a
regular basis. In case of normal wear the lifetime of the diaphragms and valves is >
10000 operating hours.
- Prevent internal condensation, transfer of liquids or dust. The diaphragm and
valves will be damaged, if liquids are pumped in significant amount.
If the pump is exposed to corrosive gases or vapour or in case of deposits, mainte-
nance should be carried out frequently.
- Regular maintenance will improve the lifetime of the pump and also protect both
man and environment.
Ensure that maintenance is done only by suitable trained and supervised techni-
cians.
☞
Ensure that the pump cannot be operated accidentally.
Never operate the pump
if covers or other parts of the pump are disassembled. Never operate a de-
fective or damaged pump.
☞
Before starting maintenance
isolate the pump from the electrical supply and
wait
two minutes
after isolating the equipment from mains to allow the capaci-
tors to discharge. Avoid the release of pollutants. Allow sufficient cooling of the
pump.
•
Attention
: The pump might be contaminated with the process chemicals that
have been pumped during operation. Ensure that the pump is decontaminated
before maintenance and take adequate precautions to protect people from the
effects of dangerous substances if contamination has occurred. Ensure that the
maintenance technician is familiar with the safety procedures which relate to the
products processed by the pumping system.
• Wear appropriate safety-clothing when you come into contact with contaminated
components. Avoid the release of pollutants.
Before starting maintenance
vent the pump and isolate it from the vacuum system.
NOTICE
NOTICE
