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Maintenance
A726-01-880 Issue M
5Maintenance
5.1 Safety information
The XDS pump is designed to require little user maintenance. Observe the following guidelines when carrying out
maintenance on your pump:
Ensure that maintenance is done by a suitably trained and supervised technician. Obey your local and
national safety requirements.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the products
processed by the pumping system.
Check that all the required parts are available and are of the correct type before you start 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. Make sure that the pump is switched off in case the thermal overload device restarts the pump.
Do not re-use internal O-rings.
The pump 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.
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present in the
pump if the pump has been heated to 260 °C and above. Fluorinated materials are safe in normal use but can
decompose into very dangerous substances (which may include hydrofluoric acid) if they are heated to
260 °C and above. The pump may have overheated if it was misused or if it was in a fire. Health and Safety
Data sheets for fluorinated materials used in the pump are available on request: contact your supplier or
Edwards.
5.2 Maintenance plan
More frequent maintenance may be required if the pump is used to pump aggressive gases and vapours, such as
solvents, organic substances and acids, or if the pump is operated continuously at the higher end of its operating
temperature, refer to Section 2.1. If necessary, adjust the maintenance plan according to your experience.
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.
Table 8 - Maintenance plan
Operation Frequency Refer to Section
Inspect and clean inlet strainer Annually 5.3
Inspect and clean the gas-ballast control (if
fitted)
Annually 5.4
Clean the external fan cover Annually 5.5
Replace the tip seals and exhaust valve Annually or as required 5.6
Test the motor condition 15000 hours 5.7
Replace the bearings 35000 hours contact Edwards