Stopping And Shutdown - Flowserve VTP User Instructions

VERTICA
5.8.4 Pum mp and moto
If the p pumps are wo orking in a po
explosive atm mosphere, te
monitoring a at the bearings s is recomme
If pump bear ring temperat
bearings) are e to be monito
benchmark t temperature is
commissioni ng stage and d after the bea
temperature has stabilize

Record t the bearing te emperature (t
ambient temperature

Estimate e the likely ma aximum ambi
tempera ture (tb)

Set the a alarm at (t+tb
trip at 100 C C (212 F) for
and the t
C (220 F) f
and 105 for grease lub
It is importan nt, particularly y with grease
keep a close e watch on the e bearing tem
After startup the temperat ture rise shou
reaching a m maximum afte
hours. This temperature
constant or m marginally red duce with time
5.8.5 Mult tiple Can Pum mp Operatio
Additional pr rocedures ma ay be required
can pump sy ystems when
idle. Contact t Flowserve fo or details.
5.9 Stopp ping and S Shutdown
a) Close th e outlet valve e, but ensure
runs in th his condition
seconds s.
b) Stop the e pump.
c) Switch o off flushing an
supplies at a time app propriate to th
For prolon nged shutdow
especially w hen ambient
drop below f freezing point
and flushing arrangement ts must be dra
otherwise pr rotected.
5.10 Hydr aulic, mec chanical an
dut y
This product t has been su
performance e specification ns of your pur
however it is s understood t
product thes se may chang
help the use r decide how
Page 46 of 7 76
AL TURBINE E PUMPS (VT
r bearing tem mperature
tentially
mperature or vibration
ended.
ures (such as s thrust
ored it is esse ential that a
s recorded at t the
aring
d.
) and the
(ta)
ent
-ta+5) C [(t+ tb-ta+10) F]
oil lubrication n
brication
lubrication, to
mperatures.
uld be gradua
r approximate ely 1.5 to 2
rise should th hen remain
e.
on
d in multiple
one or more pump remain ns
that the pump
for no more t han a few
d/or cooling/h heating liquid
he process.
wns and
temperatures s are likely to
, the pump an nd any coolin
ained or
nd electrica
pplied to mee et the
rchase order,
that during th e life of the
e. The follow wing notes ma
to evaluate t he implication
TPS) CENTRI IFUGAL PUM
of any change. If in
Flowse erve office.
5.10.1 Specific gr
Pump capacity and
change e with SG, ho
pressu ure gauge is d
absorb bed is also dir
therefo ore important
will not t overload the
the pu mp.
5.10.2 Viscosity
For a g given flow rat
increas sed viscosity
viscos ity. Also for a
absorb bed increases
reduce es with reduce
checks s are made w
if chan nges in viscos
o
5.10.3 Pump spee
l,
Chang ging pump spe
absorb bed, NPSH , n
R
direct p proportion to p
ratio sq quared and po
The ne ew duty, howe
system m curve. If incr
therefo ore to ensure t
pressu ure is not exce
NPSH > NPSH , an
A A R
within l local requirem
5.10.4 Net positiv
NPSH available (NP
p
availab ble in the pum
pressu ure, at the pum
NPSH required (NPS
require ed in the pump
pressu ure, to prevent
importa ant that NPSH
NPSH > NPSH sh
A A R
change e in NPSH
A
are no ot significantly
g
perform mance curve
particu ularly if flow h
If in do oubt please co
al
office f for advice and
margin n for your app
5.10.5 Pumped flo
Flow m must not fall o
ay
maxim mum continuou
ns
perform mance curve
MPS ENGLIS SH 71569224
n doubt conta ct your neare
ravity (SG)
total head in metres (feet)
owever pressu ure displayed
directly propo rtional to SG.
rectly proport ional to SG.
to check that t any change
e pump driver r or over-pres
te the total he ead reduces w
and increase es with reduce
a given flow r ate the powe
s with increas sed viscosity,
ed viscosity. It is importan
with your near est Flowserve
sity are planne ed.
ed
eed effects flow w, total head,
noise and vibra ation. Flow va
pump speed, h head varies as
ower varies as s speed ratio c
ever, will also b be dependent
reasing the sp peed, it is impo
the maximum pump working
eeded, the driv ver is not overl
nd that noise a and vibration a
ments and regu ulations.
ve suction he ead (NPSH
PSH ) is a me easure of the
A
mped liquid, a above its vapo
mp suction br ranch.
SH ) is a mea asure of the he
R
ped liquid, abo ove its vapour
t the pump from m cavitating.
H > NPSH . T The margin be
A
R
ould be as lar rge as possible
is s proposed, e ensure these
y eroded. Ref fer to the pum
to determine exact require
as changed.
onsult your ne earest Flowse
d details of th he minimum a
plication.
ow
outside the mi inimum and
us safe flow s shown on the
and or data s sheet.
flowse
4 – 02-15
est
) do not
d on a
. Power
It is
in SG
ssurize
with
ed
r
and
nt that
e office
power
aries in
s speed
cubed.
t on the
ortant
g
loaded,
are
)
A
head
our
ead
It is
etween
e. If any
margins
mp
ements
erve
allowable
pump
erve.com