Fire Pump 8100 Series - Suction Piping

AC61
0
0
2 Rev 03

Fig. 17 L
o
fir
e
Notes:
1) F
=
2)
M
cl
o
3) ∑
F
4) ∑
M
5)
T
h
m
u
6)
V
a
+
o
c
a
n
o
o
ad and moment
e
pump casings
=
External force
= External mom
o
ckwise)
F
=
√
F
x
2
+ F
y
2
+ F
M
=
√
M
x
2
+ M
y
2
+
h
e nozzle loads
a
u
st not exceed t
h
a
lues given are f
o
o
r – direction. In
d
a
n be increased
p
o
t exceeded.
orientation for
H
(tension or com
p
ent (clockwise o
z
2
, (∑F = result
a
M
z
2
, (∑M = resu
l
a
pplied to the pu
m
h
e values given i
o
r loads applied
d
ividual forces a
p
rovided that ∑F
H
orizontal Split C
p
ression (+/-))
r
counte
r
-
a
nt force).
l
tant moment).
m
p flanges
n the tables.
concurrently in
nd moments
and ∑M are
ase
7.6.
3
The
s
impo
r
losse
s
pum
p
Sucti
o
sucti
o
Sucti
o
possi
b
sucti
o
A mi
n
tee a
n
requi
r
openi
Ecce
n
redu
c
They
reco
m
pipe
s
A hor
pum
p
and
p
the pi
redu
c
NOT
E
redu
c
pock
e
and i
n
18.
Whe
n
follo
w
sucti
o
sucti
o
pum
p
This
v
multi
p
sucti
o
used,
7.6.4
Whe
n
possi
b
slowl
y
Wher
e
sucti
o
isolat
e
Gate
pum
p
Instal
l
Glob
e
3
Suction
s
izing and install
a
r
tant. It must be
s
s
a
r
e minimized
p
when started a
n
o
n Head) proble
m
o
n piping system
o
n piping should
ble, and never s
m
o
n opening.
n
imum of ten (10
)
n
d the pump sh
o
r
ed, it should be
o
ng, depending o
CAU
T
An el
b
the s
u
plane
caus
e
probl
e
distri
b
elbo
w
help
e
n
t
r
ic reducers sh
c
tion each to avo
should be of the
m
mended. When
s
hould slope up
w
r
izontal suction li
n
p
. Any high point
p
revent proper o
p
ping to the sucti
o
c
e
r
with the ecce
E
: When operati
n
c
er in a horizont
a
e
t in the top of th
n
correct suction
p
n
installing valve
s
w
ing precautions:
o
n lift conditions,
o
n line to avoid t
h
p
is started.
v
alve should be
o
p
le spring type, s
o
n line. (Under al
should be instal
Discharge Pipin
g
n
foot valves are
b
ilities of “water
h
y
before shutting
r
e two or more p
u
o
n line, install ga
t
e
d from the line.
valves should b
e
p
s with a positive
l gate valves wit
h
e
valves should
n
piping
a
tion of the sucti
o
s
elected and ins
t
and sufficient liq
u
n
d operated. Ma
n
m
s can be direct
l
s.
be short in leng
t
m
aller in diamet
e
)
pipe diameters
o
uld be allowed. I
one or two sizes
o
n its length.
T
ION
b
ow should not
u
ction of a doub
is parallel to th
e
e
an excessive
a
e
ms in the pum
p
b
ution. If there i
s
w
should have st
e
venly distribut
e
ould be limited t
o
id excessive tur
b
conical type. C
o
operating on a
s
w
ard to the pum
p
n
e must have a
g
in the pipe can
b
p
eration of the p
u
o
n opening dia
m
ntric side down t
n
g on suction lift
a
l suction line, as
e reducer and t
h
piping arrangem
s
in the suction
p
If the pump is o
p
a foot valve ma
y
h
e necessity of p
o
f the flapper typ
s
ized to avoid ex
c
l other condition
s
led in the disch
a
g
).
used, or where
t
h
ammer,” close
t
down the pump
.
u
mps are conne
c
t
e valves so that
e
installed on th
e
pressure for ma
h
stems horizont
a
n
ot be used, part
o
n piping is extr
e
t
alled so that pre
s
u
id will flow into
t
n
y NPSH (Net P
o
l
y attributed to i
m
t
h, as direct as
e
r than the pum
p
between any el
b
f a long suction
p
larger than the
s
be used directl
y
le suction pum
p
e
pump shaft. T
a
xial load or NP
S
p
due to an une
v
s
no other choic
e
raightening van
e
the flow.
o
one pipe size
b
ulence and noi
s
o
ntour reducers
a
s
uction lift, the s
u
p
nozzle.
g
radual rise to th
e
b
ecome filled wit
h
u
mp. When redu
c
m
eter, use an ec
c
t
o avoid air pock
e
never use a con
c
it tends to form
a
h
e pipe. Some c
o
ents are shown
i
p
iping, observe t
h
p
erating under s
t
y
be installed in t
h
riming each tim
e
e, rather than th
e
c
essive friction i
n
s
, a check valve,
a
rge line, see se
c
t
here a
r
e other
t
he discharge va
.
c
ted to the same
any pump can
b
e
suction side of
a
intenance purpo
s
a
l to avoid air po
icularly where N
P
22
e
mely
s
su
r
e
t
he
o
sitive
m
p
r
oper
p
b
ow or
p
ipe is
s
uction
y
before
p
if its
his can
S
H
v
en flow
e
, the
es to
s
e.
a
re not
u
ction
e
h
air
c
ing
c
entric
e
ts.
c
entric
a
n air
o
rrect
i
n Fig.
h
e
t
atic
h
e
e
the
e
n
the
if
c
tion
lve
b
e
a
ll
s
es.
o
ckets.
P
SH is