© Edwards Limited 2012. All rights reserved. Page 11
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Installation
A705-61-880 Issue M
3 Installation
3.1 Safety
A suitably trained and supervised technician must install the pump.
Ensure that the installation technician is familiar with the safety procedures which relate to the
products pumped.
Wear the appropriate safety-clothing when you come into contact with contaminated components.
Dismantle and clean contaminated components inside a fume-cupboard.
Vent and purge the process system before you start installation work.
Check that all of the required components are available and of the correct type before you start
installation work.
Disconnect the other components in the process system from the electrical supply so that they cannot
be operated accidentally.
Do not allow debris to get into the pump during installation.
Do not reuse ‘O’ rings if they are damaged.
Safely route any electrical supply cables so that they cannot accidentally trip people.
Note: For Bareshaft pumps, see Section 5.11.2, "Fit the new pump-motor", and see Section 2.3 - 2.4, Table 4 and 5
for required motor specifications.
3.2 System design
Obey the safety instructions listed below and take note of appropriate precautions. If you do not,
you can cause injury to people and damage to equipment.
Particular caution should be exercised when working with Fomblin oil that may have been exposed
to temperatures above 260 °C. Refer to the Edwards Materials Data Sheets for detailed
information.
Ensure that your system can provide adequate gas-ballast and/or inlet purge to dilute toxic,
flammable or explosive gases to safe limits. If you do not, there will be a risk of emission of
hazardous gases.
When the pump is switched off, gas will flow in reverse direction through the pump and there will
be a rapid pressure rise in the inlet pipeline and your process system. If this will cause a dangerous
situation (or if it will adversely affect your process), you must incorporate suitable devices (such
as a fast-acting inlet isolation-valve or an outlet check-valve) in your system pipelines.
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