Flowserve CPXV fitted with WW - Manual (Page 8)

CPXV - WW/CW USER INSTRUCTIONS ENGLISH 85392698 10-09
Page 8 of 36 flowserve.com
Where there is any risk of the pump being run against a
closed valve generating high liquid and casing external
surface temperatures it is recommended that users fit
an external surface temperature protection device.
Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, temperature monitor or a
power monitor and make routine vibration monitoring
checks.
In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.
The equipment utilises polymer based seals and
bearing surfaces that could be corroded if they
are in contact with unsuitable liquids or gases.
These surfaces are important for the operation of
the pump. Contact Flowserve if you are uncertain
about the performance of these materials with
respect to aggressive substances that may be
present in the hazardous area.
The pump casing must be flooded with liquid to the
minimum level on the dimensional General
Arrangement (GA) drawing, at any time that the pump
is operated. On pumps furnished to Group II
Category 1 below the soleplate, monitoring of the
level with a pump cut out on low level is required.
For pumps furnished to Category 1/2 and 1/3, if the
pump is operating remotely without regular checking,
it must be installed with continuous monitoring of
vibration level, set to shut down the pump at high
vibration levels, see also section 5.8.4.
1.6.4.4 Preventing the build up of explosive
mixtures
ENSURE THE PUMP IS PROPERLY FILLED
AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge
pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented. In addition it is essential to
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.
If the operation of the system cannot avoid this
condition the fitting of an appropriate dry run
protection device is recommended (for example liquid
detection or a power monitor).
To avoid potential hazards from fugitive emissions of
vapor or gas to atmosphere the surrounding area
must be well ventilated.
1.6.4.5 Preventing sparks
To prevent a potential hazard from mechanical
contact, the coupling guard must be non-sparking
and anti-static for Category 2.
To avoid the potential hazard from random induced
current generating a spark, the earth contact on the
baseplate must be used.
Avoid electrostatic charge: do not rub non-
metallic surfaces with a dry cloth; ensure cloth is
damp.
For ATEX the coupling must be selected to comply
with 94/9/EC. Correct coupling alignment must be
maintained.
1.6.4.6 Preventing leakage
The pump must only be used to handle liquids
for which it has been approved to have the correct
corrosion resistance.
Avoid entrapment of liquid in the pump and associated
piping due to closing of suction and discharge valves,
which could cause dangerous excessive pressures to
occur if there is heat input to the liquid. This can occur if
the pump is stationary or running.
Bursting of liquid containing parts due to freezing
must be avoided by draining or protecting the pump
and ancillary systems.
Where there is the potential hazard of a loss of a seal
barrier fluid or external flush, the fluid must be monitored.
If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
recommended.
1.6.4.7 Maintenance to avoid the hazard
CORRECT MAINTENANCE IS REQUIRED TO
AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION
The responsibility for compliance with maintenance
instructions is with the plant operator.