BOC E2M28, Instruction Manual

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E2M28 and E2M30 Rotary Vacuum Pumps
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Issue K 29 Jul 05
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
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
o
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. BOC Edwards Material
Safety Data sheets for fluorinated materials used in the pump are available on request: contact your
supplier or BOC Edwards.
5.2 Maintenance plan
The plan shown in Table 9 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 BOC 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 Section 7.3.
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.