Edwards ES65

© Edwards Limited 2015. All rights reserved. Page 19
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
A352-03-880 Issue B
5Maintenance
5.1 Safety
 A suitably trained and supervised technician must maintain the pump.
 Ensure that the maintenance technician is familiar with the safety procedures that relate to the pump oil
and the products processed by the pumping system.
 Wear the appropriate safety clothing when coming into contact with contaminated components.
 Dismantle and clean contaminated components inside a fume cupboard.
 Do not reuse O-rings or seals.
 Allow the pump to cool for at least 3 hours before starting maintenance work.
 Isolate the pump and other components from the electrical supply so that they cannot be operated
accidentally.
 After maintenance has been completed, recheck the direction of pump rotation if the electrical supply has
been disconnected.
 Check all required components are available and are of the correct type before starting work.
 Leak test the system after installation is complete and seal any leaks found to prevent leakage of hazardous
substances out of the system and leakage of air into the system.
 Protect sealing faces from damage.
 The pump and the pump oil will be contaminated with the process chemicals that have been pumped during
operation. Ensure that the pump is decontaminated before maintenance and take adequate precautions to
protect people from the effects of dangerous substances if contamination has occurred.
 Ensure all guarding is in place and secure before restarting pump.
 The pump must be drained before shipping.
5.2 Maintenance plan
The plan shown in Table 1 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 with gas ballast or to pump corrosive or abrasive
gases and vapours. Adjust the maintenance plan as necessary.
When maintaining the pump, use Edwards spares and maintenance kits. The kits contain all components necessary
to complete maintenance operations successfully. The item numbers of the spares and kits are given in Section 7.
Examine the condition of any external accessories, filters or traps (if fitted). Refer to the instructions supplied with
the accessories for maintenance procedures.
WARNING
Obey the safety instructions in this section and take note of appropriate precautions. Failure to
observe these instructions may result in injury to people and damage to equipment.