Flowserve APKD - Manual (Page 27)

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13
Page 27 of 55 flowserve.com
4.6.3 Auxiliary piping
4.6.3.1 Drains
Normal pump leaks and gland leakage to be
drained through a separate piping arrangement or
back into the suction/sump.
4.6.3.2
Pumps fitted with gland packing
The pumped liquid is allowed to flow through the
gland packing at discharge pressure and drained
out of the pump or re-circulated back into the
suction.
4.6.3.3 Pumps
fitted with mechanical seals
Auxiliary piping to circulate the flushing liquid back
into the suction is required. In case of external
clean source requirements for pump applications
such as high temperature service, contaminated
fluids, oxidizing fluids, a special piping plan to carry
the clean liquid into the seal chamber with
adequate pressure is required and several piping
plans are available to suit the specific pump
application.
4.6.3.4 Seal
Injection
Seal injection into the condenser pump stuffing box
is required for both the packed box and mechanical
seal designs the injection is necessary to:
A)
Lubricate either the packing or seal face
during operation: and,
B)
Provide a positive liquid seal at the stuffing
box when the pump is idle and the condenser is
under vacuum to prevent air leakage into the
system
The piping plans and flush supply are to
be selected based on the application and operating
parameters.
4.6.4 Final
checks
After connecting the piping to the pump, rotate the
shaft several times by hand to ensure no pipe
strain. If pipe strain exists, correct piping.
4.7 Electrical Connections
Electrical connections must be made
by a qualified Electrician in accordance with
relevant local national and international regulations.
It is important to be aware of the EUROPEAN
DIRECTIVE on potentially explosive areas where
compliance with IEC60079-14 is an additional
requirement for making electrical connections.
It is important to be aware of the EUROPEAN
DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site.
Attention must be paid to ensure that the
techniques used during wiring/installation do not
increase electromagnetic emissions or decrease
the electromagnetic immunity of the equipment,
wiring or any connected devices. If in any doubt
contact Flowserve for advice.
The motor must be wired up in
accordance with the motor manufacturer's
instructions (normally supplied within the terminal
box) including any temperature, earth leakage,
current and other protective devices as appropriate.
The identification nameplate should be checked to
ensure the power supply is appropriate.
A device to provide emergency stopping must
be fitted.
If not supplied pre-wired to the pump unit, the
controller/starter electrical details will also be
supplied within the controller/starter.
For electrical details on pump sets with controllers
see the separate wiring diagram.
See section 5.4,
Direction of
rotation before connecting the motor to the
electrical supply.
4.8 Final shaft alignment check
After connecting piping to the pump, rotate the
shaft several times by hand to ensure there is no
binding and all parts are free. Recheck the
coupling alignment, as previously described, to
ensure no pipe strain. If pipe strain exists, correct
piping.
4.9 Protection systems
The following protection systems are
recommended particularly if the pump is installed in
a potentially explosive area or is handling a
hazardous liquid. If in doubt, consult Flowserve.
If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.