© Edwards Limited 2012. All rights reserved.
Page 23
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Maintenance
A373-10-880 Issue R
5
Maintenance
5.1
Safety information
CAUTION
Never use hydrocarbon lubricants in a PFPE-prepared pump.
Note:
If your pump is PFPE-prepared, refer to
.
A suitably trained and supervised technician must maintain the pump.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the pump-oil
and the products processed by the pumping-system.
Allow the pump to cool to a safe temperature before you start maintenance work.
Isolate the pump and other components in the pumping system from the electrical supply so that they can
not be operated accidentally.
After maintenance is completed, recheck the pump rotation direction if the electrical supply has been
disconnected.
Do not reuse O-rings and seals if they are damaged.
The pump and its oil will be contaminated with the process chemicals that have been pumped during
operation. Ensure that the pump is decontaminated before maintenance and that you take adequate
precautions to protect people from the effects of dangerous substances if contamination has occurred.
Leak-test the system after maintenance work is complete if you have connected or disconnected any vacuum
or exhaust joints; seal any leaks found.
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the
pump has been heated to 260 °C and above. These breakdown products are very dangerous. Fluorinated
materials in the pump may include oils, greases and seals. The pump may have overheated if it was misused,
if it malfunctioned or if it was in a fire. Edwards Material Safety Data sheets for fluorinated materials used in
the pump are available on request: contact your supplier or Edwards.
5.2
Maintenance plan
The plan shown in
details the routine maintenance operations necessary to maintain the pump in normal use.
Instructions for each operation are given in the section shown.
More frequent maintenance may be required if the pump is used to process corrosive or abrasive gases and vapours;
in these circumstances, we recommend that you replace the pump seals every year. If necessary, adjust the
maintenance plan according to your experience.
When you maintain the pump, use Edwards spares and maintenance kits; these contain all of the components
necessary to complete maintenance operations successfully. The Item Numbers of the spares and kits are given in
Examine the condition of any external accessories, filters or traps (if fitted) when you maintain the pump. Refer to
the instructions supplied with these accessories for the necessary maintenance procedures.
WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not,
you can cause injury to people and damage to equipment.
