Flowserve Chemstar standard - Manual (Page 18)

CHEMSTAR USER INSTRUCTIONS ENGLISH 71569185 02-10
Page 18 of 44 flowserve.com
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
Ensure inlet pipe and pump casing is
completely full of liquid before starting continuous
duty operation.
Priming may be carried out with an ejector, vacuum
pump interceptor or other equipment, or by flooding
from the inlet source.
When in service, pumps using inlet pipes with foot
valves may be primed by passing liquid back from the
outlet pipe through the pump.
5.6.2 Auxiliary supplies
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
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.
c) OPEN all inlet valves.
d) Prime the pump.
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 against a
closed valve for more than 30 seconds.
h) If NO pressure, or LOW pressure, STOP the
pump. Refer to section 7, Faults; causes and
remedies for fault diagnosis.
5.8 Running the pump
5.8.1 Pumps fitted with packed gland
If the pump has a packed gland there must be some
leakage from the gland. Gland nuts should initially be
finger-tight only. Leakage should take place soon
after the stuffing box is pressurised.
The gland must be adjusted evenly to give
visible leakage and concentric alignment of the gland
ring to avoid excess temperature. If no leakage takes
place the packing will begin to overheat. If
overheating takes place the pump should be stopped
and allowed to cool before being re-started. When
the pump is re-started, check to ensure leakage is
taking place at the packed gland [4130].
If hot liquids are being pumped it may be necessary to
slacken the gland nuts to achieve leakage.
The pump should be run for 10 minutes with steady
leakage and the gland nuts tightened by 10 degrees at a
time until leakage is reduced to an acceptable level,
normally 30 to 120 drops per minute. Bedding in of the
packing may take another 15 minutes.
If the pump is equipped with a quench type packing
gland follow the same adjustment procedure as
above after closing the quench line valve. Re-open
the quench line valve after adjusting the packing to
an acceptable leakage rate.
If a grease lubricator is used for packing lubrication,
give the lubricator handle one or two turns every 100
hours of operation.
Care must be taken when adjusting the gland
on an operating pump. Safety gloves are essential.
Loose clothing must not be worn to avoid being
caught up by the pump shaft. Shaft guards must be
replaced after the gland adjustment is complete.
Never run gland packing dry, even for
a short time.
5.8.2 Pumps fitted with mechanical seal
Mechanical seals require no adjustment. Any slight
initial leakage will stop when the seal is run in. Seals
will always have leakage emission from the boundary
film edge in operation.
Before pumping dirty liquids it is advisable, if
possible, to run the pump in using clean liquid to
safeguard the seal face.