Flowserve IDP CPXV - Manual (Page 20)

CPXV and CPXRV USER INSTRUCTIONS ENGLISH 71569193 09-14
Page 20 of 48
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correct before fitting the coupling element. Direction of
rotation must correspond to the direction arrow.
If maintenance work has been
carried out to the site's electricity supply, the direction
of rotation should be re-checked as above in case the
supply phasing has been altered.
5.5 Guarding
Guarding is supplied fitted to the pump set.
In member countries of the EU and EFTA, it is a legal
requirement that fasteners for guards must remain
captive in the guard to comply with the Machinery
Directive 2006/42/EC.
When releasing such guards, the fasteners must be
unscrewed in an appropriate way to ensure that the
fasteners remain captive.
Whenever guarding is removed or disturbed ensure
that all the protective guards are securely refitted
prior to start-up.
5.6 Priming and auxiliary supplies
5.6.1
Filling and priming
The pump end needs to be
completely submerged in the product.
5.6.2
Auxiliary supplies
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
5.6.3
Pumps fitted with a heating jacket on
molten sulphur pumps
The pump should be pre-heated for at
least one hour using steam through the heating jacket
before hot liquid is brought into the pump. The
quantity, temperature and pressure can be obtained
from the dimensional drawing. This action is
important to avoid distortion and maintain the gap
between impeller and casing.
Ensure pump is electrically isolated.
Then, before starting the driver, rotate the shaft
several times by (thermal gloved) hand to ensure
freedom of rotation as the high temperature will
cause expansion and the increase in lengths of the
components should be identical.
5.6.4 Pumps with rigid coupling on high
temperature service fitted with cooling fan and
heat sink (e.g. for molten salt)
These instructions already assume that any
vertical expansion bellows have been installed and
adjusted prior to installation of the pump assembly.
There are no constraints on the time
required to lower the pump into the tank but allow three
to four hours for bringing the pump unit to the required
temperature. (Minimum time required specified is
between placing the pump in place and the point of
starting the pump.) Standard safety procedures must
be followed. Pump can be installed and removed at any
liquid level; however, the spacer coupling above the
pump thrust bearing must be removed prior to this and
the impeller clearance must be wide so that the rotor
can be free to move axially in both directions. After the
temperature stabalization the impeller clearance can be
reset;
see section 6.7, Setting impeller clearance.
Ensure pump is electrically isolated.
Then, before starting the driver, rotate the shaft several
times by (thermal gloved) hand to ensure freedom of
rotation as the high temperature will cause expansion at
the liquid end and the increase in lengths of the
components should be identical.
5.7 Starting the pump
a) Ensure flushing and/or
cooling/heating liquid supplies are turned ON,
before starting pump.
b) CLOSE the outlet valve partially, but ensure that
air is allowed to escape out of the discharge pipe.
This is especially important for pumps with
product lubricated line bearings.
c) Ensure that the liquid level in
the sump is above the minimum pump casing
submergence level.
d) Ensure all vent valves are
closed before starting.
e) Start motor and check the outlet pressure.
f) If the pressure is satisfactory, SLOWLY open the
outlet valve.
g) Do not run the pump with the
outlet valve completely closed.
h) If NO pressure, or LOW pressure, STOP the pump.
Refer to section 7, Faults; causes and remedies for
fault diagnosis.