Documents are only to be used and distributed completely and unchanged, especially including the section ”Safety information”. This is page 40 of a document consisting of
49 pages. The instructions for use describe only the actual product. If the product is older or newer than the date of writing, it is strictly the users´ responsibility to check carefully
the validity of the document (if in doubt, order appropriate instructions for use). 99 90 34 / 12/09/2003
Set of seals (diaphragms, valves, face wrench)
for MZ 2C VARIO / PC 2002 VARIO
..........................................................................................
69 68 14
O-ring (in head covers) 26x1
..............................................................................................
4 x 63 73 49
Set of seals (diaphragms, valves, face wrench)
for MD 4C VARIO / PC 2004 VARIO
.........................................................................................
69 68 15
O-ring (in head covers) 26x1
.............................................................................................
8 x 63 73 49
Set of seals (diaphragms, valves, face wrench, O-rings)
for PC 2003 VARIO
...................................................................................................................
69 68 29
Tools required (metric):
-
Phillips screw driver size 2
-
Open-ended wrench w/f 8/15/17
-
Hex key w/f 5
-
Face wrench size 40/4 (included in the set of seals)
Replacing diaphragms and valves
All bearings are encapsulated and are filled with long-life lubricant. Under normal op-
erating conditions, the pump is maintenance free. The valves and the diaphragms are
wear parts. If the rated ultimate vacuum is no longer achieved, the pump interior, the
diaphragms and the valves must be cleaned and the diaphragms and valves must be
checked for cracks or other damage.
Depending 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.
Before starting maintenance
vent the system, isolate the pump and other compo-
nents from the vacuum system and the electrical supply. Drain condensate if applica-
ble, avoid the release of pollutants. Allow sufficient cooling of the pump.
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 defective or dam-
aged pump.
Ensure that the maintenance technician is familiar with the safety procedures which
relate to the products processed by the pumping system.
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.
☞
Wear appropriate safety-clothing when you come in contact with contaminated
components.
