© Edwards Limited 2008. All rights reserved. Page 39
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Maintenance
S900-01-880 Issue C
5Maintenance
5.1 Safety information
A suitably trained and supervised technician must maintain the booster pump.
Dismantle the booster pump in a clean workshop environment, with the correct tools and safety facilities
available.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the pump oil
and the products pumped. Wear appropriate safety-clothing when you come in contact with contaminated
components. Dismantle and clean contaminated components inside a fume- cupboard.
Check that all the required parts are available and of the correct type before starting work.
Isolate the pump and other components from the electrical supply so that they cannot be operated
accidentally.
Allow the pump to cool (so that it is at a safe temperature for skin contact) before you start maintenance
work.
Vent and purge the pumping system with nitrogen before you start maintenance work.
Do not reuse 'O' rings and Co-Seals.
Dispose of components and waste oil safely (See Section 6.2).
Take care to protect sealing faces from damage.
After maintenance is complete, recheck the direction of pump rotation if the electrical supply has been
disconnected.
The booster pump and pump 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 have been taken to protect people from the effects of dangerous substances if contamination
has occurred.
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the
pump has been heated to 260 oC (500 oF) and above. These breakdown products are very dangerous.
Fluorinated materials in the booster pump include oils, greases and seals. The booster 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 booster pump are available on request: contact your supplier or
Edwards.
If necessary, maintain the motor as specified in the manufacturers information supplied with the motor.
Leak test the system after maintenance and seal any leaks found, to prevent leakage of dangerous
substances out of the system and leakage of air into the system.
5.2 Leak detection
Carry out a leak test if the specified booster pump ultimate vacuum cannot be achieved. A properly carried out leak
test will isolate sections of the pipelines until the leak-source is found. The use of a leak detector will speed the
process. If required, contact Edwards for more information.
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