Flowserve VF - Manual (Page 18)

VF USER INSTRUCTIONS ENGLISH 71561233 - 11/09
Page 18 de 32
Discharge pipe above the mounting plate
Discharge pipe below the mounting plate
Ensure piping and fittings are
flushed before use.
Ensure piping for hazardous liquids
is arranged to allow pump flushing before removal
of the pump
4.5.2 Design of a discharge line
a) If discharge line is provided with a divergent,
its total angle will be between 7° and 12°.
b) Install the discharge valve after the non-return
valve downstream.
c) The non-return valve will be set in the
discharge pipe to protect the pump from any
excessive pressure surge and from reverse
rotation.
If necessary, a control manometer can be
connected on the pipework.
Do not tighten flanges before the
final check (see § 4.5.3).
4.5.3 Final checks
a) Check the tightening of anchor bolts. Tighten
them if necessary.
b) Check that protective covers on suction and
discharge flanges are removed.
c) Check that holes of pipe work flanges are
parallel and correspond to those of the pump.
d) Tighten discharge flange.
e) Check by hand that the pump turns freely. A
binding indicates a distortion of the pump,
which is due to excessive pipes strains. If
necessary the pipework design must be re-
examined.
f) If it provided, connect auxiliary pipe systems
(hydraulic, pneumatic, sealing system).
g) Control tightness and functionality of auxiliary
pipings.
4.6 Electrical connections
4.6.1 Safety conditions about electrical
connections
Electric connections must be carried
out by a qualified electrician, following the local
rules and regulations in force.
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.
Avoid mechanical, hydraulic or electrical
overload by using motor overload trips or a power
monitor and make routine vibration monitoring.
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 doubt, contact
Flowserve for advice.