Flowserve LNGT - Manual (Page 26)

LNGT USER INSTRUCTIONS ENGLISH 00083107 02-08
Page 26 of 48
®
(1) Possi bl e
pri mi ng
poi nt s
5.5.2 Suction lift with foot valve fitted
Fill suction pipe and casing with liquid at a pressure
of 1 to 2 bar from an external source. Vent as
described in section 5.5.1.
5.5.3 Suction lift without foot valve
Pump casing vents on the suction volute must be
connected to an external vacuum pump priming
system. If in doubt please consult Flowserve.
Possible
priming
points
To vacuum
pump
5.6 Starting the pump
a) Ensure flushing and/or cooling/
heating liquid supplies are turned ON before
starting the pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.
d) Prime the pump.
e) Ensure all vent connections are closed
before starting.
f) Start motor and check outlet pressure.
g) If the pressure is satisfactory, slowly OPEN
outlet control valve.
h) Do not run the pump with the
outlet valve closed for a period longer than 30
seconds.
i) If NO pressure, or LOW pressure, STOP the
pump. Refer to section 7, Faults; causes and
remedies, for fault diagnosis.
5.7 Running the pump
5.7.1 Venting the pump
Vent the pump to enable all trapped air to
escape taking due care with hot or hazardous
liquids.
Under normal operating conditions, after the pump
has been fully primed and vented, it should be
unnecessary to re-vent the pump.
5.7.2 Pumps fitted with gland packing
1 or 2 rings