Edwards EXS Series User Manual

▪ Ensure that the maintenance technician is familiar with the safety procedures
which rela
te to the products pumped.
▪ Allow the pumps to cool to a safe temperature before ng liing brackets or
starng maintenance work.
▪ Vent and purge the dry pumping system before starng any maintenance work.
▪ Isolate the dry pumping system and other components in the process system from
the electrical supply so that they cannot be operated accidentally.
▪ Wait for at least four minutes aer switching o the electrical supply before
touching any electrical component on the dry pumping system.
▪ Route and secure cables, hoses and pipelines during maintenance to avoid the
possible risk of trips or entrapment.
▪ The enclosure panels should only be removed when the dry pumping system has
been switched o and allowed to cool suciently (as an indicaon the dry
pumping system should be le for one hour with cooling water sll connected with
ow characteriscs as dened in Technical data on page 15).
▪ Wear appropriate safety clothing when coming into contact with contaminated
components. Dismantle and clean contaminated components inside a fume
cupboard.
▪ If the cables between a motor and an inverter have been disconnected and reed
then the pump rotaon should be checked.
▪ O-ring replacement intervals vary depending on the applicaon.
▪ Dispose of the components, grease and oil safely.
▪ Take care to protect the sealing faces from damage.
▪ Do not touch or inhale the thermal breakdown products of uorinat
ed materials
which may be present if the dry pumping system has been overheated to 260 °C
and above. These breakdown products are very dangerous. Fluorinated materials
in the dry pumping system include oils, greases and seals. The dry pumping system
may have overheated if it was misused, if it malfunconed or if it was in a re. Our
safety datasheets for the uorinated materials used in the pump are available on
request.
The dry pumping system requires lile operator maintenance between overhauls. Pump
protecon sensors ed to the dry pumping system do not require roune
maintenance. The maintenance operaons that can be carried out are described in the
following secons. The frequency of maintenance operaons depends on the process.
Adjust the frequency of maintenance operaons according to your experience.
When maintaining the dry pumping system, use replacement parts, seals and ngs
supplied by us. Refer to Service on page 73, Spares and accessories on page 74. Ensure
that the purge gas and cooling water supplies are connected in parallel and that they
meet the specicaons given in Technical data on page 15. Contact us for more
informaon.
7.2 Prevenve maintenance schedule
Table 20 Prevenve maintenance schedule
Acon
Frequency
Check the oil level and top-up if required 1 week
Check water hoses 6 months or 4000 operang hour
s
07/2021 - ©Edwards Limited
Page 56A41870880_A
A41870880_A - Maintenance

Edwards EXS Series Specifications

General

Brand	Edwards
Model	EXS Series
Category	Water Pump
Language	English