Maintenance; Safety Information; Maintenance Plan - Edwards E2M28 Instruction Manual

5

Maintenance

5.1

Safety information

Obey the safety instructions given below and take note of appropriate precautions. Failure to
follow instructions can cause injury to people and damage to equipment.
Never use hydrocarbon lubricants in a PFPE-prepared pump.
Note: If the 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 starting 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 adequate precautions are
taken to protect people from the effects of dangerous substances if contamination has occurred.
Leak-test the system, after maintenance work is complete, if any vacuum or exhaust joints were

disconnected or connected. 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 the supplier or Edwards.
5.2

Maintenance plan

The plan shown in Table 9
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, Edwards recommends that replacing the pump seals every year. If necessary, adjust the
maintenance plan according to experience.
When maintaining 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
Section 7.3.
Examine the condition of any external accessories, filters or traps (if fitted) when maintaining the pump. Refer to
the instructions supplied with these accessories for the necessary maintenance procedures.
© Edwards Limited 2014. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
CAUTION
Section
details the routine maintenance operations necessary to maintain the pump in normal use.
8.
A373-10-880 Issue T
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