Instruction manual

Oct 04 Issue H
GV Dry Vacuum Pumps
PAGE
25
25
MAINTENANCE
5 MAINTENANCE
5.1 Safety information
• 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 synthetic oils and greases used
and the products pumped.
• Wear the appropriate safety-clothing when
you come into contact with contaminated
components, grease and pump oil. Dismantle
and clean contaminated components inside a
fume-cupboard.
• Use suitable lifting equipment and wear safety
shoes when you replace the pump-motor or
the pump module.
• Allow the pump to cool to a safe temperature
before you start maintenance work.
• Isolate the pump and other components in
the process system from the electrical supply
so that they can not be operated accidentally.
• Recheck the pump rotation direction if the
electrical supply has been disconnected.
• Do not reuse ‘O’ rings or gaskets if they are
damaged.
• Protect sealing-faces from damage.
• Leak-test the system after installation work is
complete and seal any leaks found to prevent
leakage of dangerous substances out of the
system and leakage of air into the system:
refer to Section 3.13.
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.
• Do not touch or inhale the thermal
breakdown products of fluorinated materials
which may be present if the pump has
overheated to 260
o
C (500
o
F) and above.
These breakdown products are very
dangerous. The pump may have overheated if
it was misused, if it malfunctioned, or if it was
in a fire. BOC Edwards Material Safety Data
Sheets for the fluorinated materials used in
the pump are available on request: contact
your supplier or BOC Edwards.
5.2 Maintenance plan
The plan in Table 11 details the maintenance
operations we recommend to maintain the pump in
normal operation. Instructions for each operation
are given in the section shown.
In practice, the frequency of maintenance is
dependent on your process:
• In clean processes, you may be able to
decrease the frequency of maintenance
operations.
• In harsh processes you may have to increase
the frequency of maintenance operations.
Adjust the maintenance plan according to your
experience.
Use BOC Edwards maintenance and service kits
(refer to Section 7.3). These contain all of the
necessary seals, grease and other components
necessary to complete maintenance successfully.