Flowserve VCT - Manual (Page 11)

USER INSTRUCTIONS APM, APMA and APH MX0301 - 07/03
Page 11 of 32
®
d) Check outlet pressure.
e) Check outlet capacity.
f) Check vibration at rated capacity. Note that
vibration at different capacity than rated
capacity could be bigger.
g) Check motor current.
5.7 Running the pump
5.7.1 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 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.
The pump should be run for 30 minutes with steady
leakage and the gland nuts tightened by 10
degrees at a time until leakage is reduced to an
acceptable level, normally a minimum of 120 drops
per minute is required. Bedding in of the packing
may take another 30 minutes.
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 or too
tighten, even for a short time.
5.7.2 Pumps fitted with mechanical seal
Mechanical seals will be adjusted to pump shaft
tighten collar set screws and moving set pieces
after rotor setting was done according point 5.5;
Any slight initial leakage will stop when the seal is
run in.
Before pumping dirty liquids it is advisable, if
possible, to run in the pump mechanical seal using
clean liquid to safeguard the seal face.
External flush or quench should be
started before the pump is run and allowed to flow
for a period after the pump has stopped.
Never run a mechanical seal dry,
even for a short time.(See mech. seal IOM manual)
5.7.3 Normal vibration levels, alarm and trip
Alarm and trip values are given in
attachment in these User Instructions. Measuring
vibration at regular intervals will then show any
deterioration in pump or system operating
conditions.
5.8 Stopping and shutdown
a) Close the outlet valve until 30
degrees.
b) Stop the pump motor.
c) Continue closing the outlet valve.
5.9 Emergency shutdown
In the event of power failure, water from system will
flow in reverse through the pump while the pump
discharge valve must be slowly closing. The pump
and motor are designed so that no damage will
occur from turning at speeds until 140% of rated
speed which will be generated by the operating
head in the pipe discharge system.
6 MAINTENANCE
6.1 General
It is the plant operator's responsibility to
ensure that all maintenance, inspection and
assembly work is carried out by authorized and
qualified
personnel who have adequately
familiarized themselves with the subject matter by
studying this manual in detail. (See also section
1.6.2.)
Any work on the machine must be performed when
it is at a standstill. It is imperative that the