Flowserve QLQ Vertical Worthington - Manual (Page 42)

QLQ, QLQC USER INSTRUCTIONS ENGLISH 87900027 – 06/14
Page 42 of 61
6 MAINTENANCE
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).
Any work on the machine must be performed when it
is at a standstill. It is imperative that the procedure
for shutting down the machine is followed, as
described in section 5.10.
On completion of work all guards and safety devices
must be re-installed and made operative again.
Before restarting the machine, the relevant
instructions listed in section 5, Commissioning,
startup, operation and shut down must be observed.
Oil and grease leaks may make the
ground slippery. Machine maintenance must
always begin and finish by cleaning the ground
and the exterior of the machine.
If platforms, stairs and guardrails are required for
maintenance, they must be placed for easy access to
areas where maintenance and inspection are to be
carried out. The positioning of these accessories
must not limit access or hinder the lifting of the part to
be serviced.
When air or compressed inert gas is
used in the maintenance process, the operator and
anyone in the vicinity must be careful and have the
appropriate protection.
 Do not spray air or compressed inert gas on skin
 Do not direct an air or gas jet towards other
people
 Never use air or compressed inert gas to clean
clothes
Before working on the pump, take measures to
prevent an uncontrolled start. Put a warning board
on the starting device with the words: "Machine
under repair: do not start".
With electric drive equipment, lock the main switch
open and withdraw any fuses. Put a warning board
on the fuse box or main switch with the words:
"Machine under repair: do not connect".
Before attempting any inspection or
repair on the pump, the driver controls must be in the
"off" position, locked and tagged to prevent injury to
personnel performing service on the pump.
Before attempting to disassemble pump, pump
must be isolated from system, by closing suction and
discharge system valves, drained of liquid and
cooled, if pump is handling hot liquid.
Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.
6.1 Maintenance schedule
It is recommended that a maintenance plan
and schedule be adopted, in line with these User
Instructions. It should include the following:
a) Any auxiliary systems installed must be
monitored, if necessary, to ensure they function
correctly.
b) Gland packings must be adjusted correctly to
give visible leakage and concentric alignment of
the gland follower to prevent excessive
temperature of the packing or follower.
c) Check for any leaks from gaskets and seals.
Proper functioning of the shaft seal must be
checked on a regular basis.
d) Check bearing lubricant level, and ensure oil
changes on regular basis, according to section
5.3.5 of this manual.
e) Check that the duty condition is in the safe
operating range for the pump.
f) Check vibration, noise level and surface
temperature at the bearings to confirm
satisfactory operation.
g) Check that the dirt and dust is removed from
areas around close clearances, bearing housings
and motors.
h) Check coupling alignment and re-align if
necessary.
Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.
If any problems are found the following sequence of
actions should take place:
a) Refer to section 7, Faults; causes and remedies,
for fault diagnosis.
b) Ensure equipment complies with the
recommendations in this manual.
c) Contact Flowserve if the problem persists.