Flowserve L Worthington Simpson - Manual (Page 22)

L and U USER INSTRUCTIONS ENGLISH 85392721 07-12
Page 22 of 36 flowserve.com
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.)
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 5.8.
Guard fasteners must remain captive during
dismantling of guards as described in section 5.4.
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, start
up, 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 guard rails 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".
Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.
6.2 Maintenance schedule
It is recommended that a maintenance plan
and schedule is adopted, in line with these User
Instructions. It should include the following:
a) The pump must be completely vented and
drained and rendered inert before any
disassembly operation.
b) Any auxiliary systems installed must be monitored,
if necessary, to ensure they function correctly.
c) During cleaning of the pump ensure the
compatibility between the cleaning products and
the gaskets.
d) Verify the condition of the gaskets.
e) 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.
Mechanical seals should present no leakage
f) Check for any leaks from gaskets and seals. The
correct functioning of the shaft seal must be
checked regularly.
g) Check bearing lubricant level and condition, and
if the hours run show a lubricant change is
required.
h) Check that the duty condition is in the safe
operating range for the pump.
i) Check vibration, noise level and surface
temperature at the bearings to confirm
satisfactory operation.
j) Check the tightness of the connections.
k) Check dirt and dust is removed from areas around
close clearances, bearing housings and motors.
l) Check coupling alignment and re-align if necessary.
m) Verify the correct operation of the system.
The equipment used for maintenance and
disassembly in an ATEX zone must be in conformity
with the requirements zone.
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.