66
DUPLEX PUMP UNITS SPM SERIESFEATURESThe SPM duplex models consist of two pump/motor assem-blies with a pre-piped, common discharge manifold. Onepump/motor unit operates continuously, with the second pro-viding backup service if the main pump fails. Either automat-ic (SPM-DA models) or manual (SPM-DM models) controlsare available.
The duplex automatic series are designed specifically forbuildings where a constant supply of oil must be assured ...hospitals, apartment buildings, schools and other commer-cial/industrial buildings
The DA Series is equipped with a pressure sensing devicewhich detects a loss in pressure of the primary pump. If thestandby pump is brought into service, an alarm sounds whichindicates a malfunction in the primary pump.
The electric control circuit on the duplex automatic pump setis equipped with a lead-lag switch to permit manual alterna-tion of pump to provide even wear on each pump.
The manually operated duplex pump sets offer the same pro-tection as an automatic except the standby pump must beturned on manually which requires that maintenance person-nel always be available.
67
SUPPLY UNIT SPECIFICATIONS
SPM Series Supply Units
Single and Duplex
Capacities:15, 30, 65, and 135 gph
Pressure:Maximum operating pressure to 80 psi or 200’ of head.
Motors: All motors are 60 cycle, 1750 rpm, continuous duty, 48Nframe, 1/6, 1/4, 1/3 hp: split phase, 115 or 230 volt operation,1/2 hp: capacitor start/induction run, TEFC, dual 115/230volt.
Pumps:SPM 15, 35, and 65: uses Webster “2R” Series pump units.SPM 135: uses the Webster ‘2V” Series pump unit.Webster 2R and 2V are UL listed
Porting:SPM 15, 30, 65:
1/4” NPTF—2 inlets, outlet port and top and bottom returns
SPM 135:1/4” NPTF—outlet port3/8” NPTF—return port, 2 optional inlets.1/2” NPTF—inlet.
Seal: All models—double lip type.
Mounting:All models — four bolt foot mount
Filter:Rotary self cleaning type, except in SPM 135. Use ofexternal line filter recommended.
Valves:Pressure regulating assembly in pump maintains set pressure.Check valve maintains oil in feeder lines for instant starts.
Gauge:2-1/2” dia., calibrated from 30” vacuum to 100 psi.
Controls: Two Types for Duplex Units Only Duplex automatic with lead-lag switch and alarm. Manual with selector switch.
Maximum Inlet Vacuum:All units—15” Hg
National Fire Protection Association compliance requires fuelinlet pressure not to exceed 3 psig.
68
SE
LE
CT
ION
TA
BL
EM
od
els
and
Des
ign
Dat
a Ta
ble
1M
ax F
low
Max
.W
atts
@ m
in.
Max
Flo
wP
um
pM
oto
rM
oto
rH
ead
Val
ve A
dj.
@ 8
0p
si@
80
Su
ctio
nM
od
elM
od
elTy
pe
Volt
age
hp
ft*
Ran
ge
psi
gp
hg
ph
Cap
.N
o.
SP
M-1
5-1
Sin
gle
115
SP
M-1
5-2
Sin
gle
230
SP
M-1
5-1-
DA
Dup
lex-
Aut
o.11
51/
620
0’10
to
100
psi
6522
1535
2R18
1C-5
BQ
4S
PM
-15-
2-D
AD
uple
x-A
uto.
230
SP
M-1
5-1-
DM
Dup
lex-
Man
115
SP
M-1
5-2-
DM
Dup
lex-
Man
230
SP
M-3
0-1
Sin
gle
115
SP
M-3
0-2
Sin
gle
230
SP
M-3
0-1-
DA
Dup
lex-
Aut
o11
51/
420
0’10
to
100
psi
9545
3070
2R28
3C-5
BQ
4S
PM
-30-
2-D
AD
uple
x-A
uto
230
SP
M-3
0-1-
DM
Dup
lex-
Man
115
SP
M-3
0-2-
DM
Dup
lex-
Man
230
SP
M-6
5-1
Sin
gle
115
SP
M-6
5-2
Sin
gle
230
69
SP
M-6
5-1-
DA
Dup
lex-
Aut
o.11
51/
320
0’10
to
100
psi
175
9065
125
2R68
6C-5
BQ
4S
PM
-65-
2-D
AD
uple
x-A
uto.
230
SP
M-6
5-1-
DM
Dup
lex-
Man
115
SP
M-6
5-2-
DM
Dup
lex-
Man
230
SP
M-1
35S
ingl
eD
ual
SP
M-1
35-D
AD
uple
x-A
uto.
115
1/2
200’
10 t
o 10
0 ps
i30
015
713
525
02V
086C
-5D
04S
PM
-135
-DM
Dup
lex-
Man
.23
0
SP
M P
umps
are
set
at
20 p
si.
*E
quiv
alen
t he
ad e
qual
s ve
rtic
al h
eigh
t fr
om s
uppl
y pu
mp
disc
harg
e to
hig
hest
poi
nt in
sys
tem
, pl
us p
ress
ure
drop
for
leng
th o
f pi
ping
run
,pl
us a
dditi
onal
loss
es d
ue t
o fit
tings
.**
Pum
ping
#2
oil (
34S
SU
U).
.85
Sp.
gr.
Su
pp
ly P
um
p U
nit
Cro
ss R
efer
ence
Web
ster
Mo
del
No
.S
un
tec
Mo
del
No
.S
PM
-15-
1 (1
725
rpm
)—
SP
M-3
0-1
(172
5 rp
m)
BH
-100
0M (
1725
rpm
)S
PM
-30-
1 (1
725
rpm
)B
B-1
020M
(34
50 r
pm)
SP
M-3
0-1
(172
5 rp
m)
BH
-103
0H (
3450
rpm
)S
PM
-65-
1 (1
725
rpm
)B
H-1
001M
(17
25 r
pm)
SP
M-6
5-1
(172
5 rp
m)
BH
-107
0M (
3450
rpm
)S
PM
-135
(17
25 r
pm)
For
hig
her
capa
citie
s, c
onsu
lt fa
ctor
y
70
INSTALLATION DATA
Compound Gage0-30” Hg0-100 psi
Check Valve
Discharge Port1/4” Pipe Thread
This PortNever Used
Pressure AdjustingScrew 1/8” Allen
Head Socket UnderSeal Screw
SPM-135 Models
Preferred Cover inlet1/2” Pipe Thread
Return Port3/8” Pipe Thread
Optional Return Port1/4” Pipe Thread
Inlet Port #21/4” Pipe Thread
Return Port1/4” Pipe Thread
Inlet Port #11/4” Pipe ThreadAccess to 1/8”Bypass Plug
71
Pump Selector Switch
Test Button
Common DischargeManifold With
IntegralCheck Valves
Inlet Port1/4” Pipe Thread
Compound Gage0-30” Hg0-100 psi
Discharge Port1/2” Pipe Thread
InletPorts1/4”Pipe
Thread
Inlet Ports1/4” Pipe Thread
Return Port1/4” Pipe Thread
Inlet Port1/4” Pipe Thread
Return Port1/4” Pipe Thread
1/2” D.Mounting
Holes
Pressure AdjustingScrew 1/8” Allen
Head SocketUnder Seal Screw
Pressure Adjusting Screw1/8” Allen Head Socket
Under Seal Screw
72
Dim
ensi
on
s
Mo
del
AB
CD
SP
M-1
56.
8815
.50
——
SP
M-3
07.
4416
.13
——
SP
M-6
58.
9619
.50
——
SP
M-1
35—
—10
.94
21.4
4
Mo
del
AP
ipe
Tap
SP
M-1
5-D
A14
.94
1/4
SP
M-3
0-D
A16
.53
1/4
SP
M-6
5-D
A16
.90
1/4
SP
M-1
35-D
A21
.37
3/8
73
Dim
ensi
on
sD
up
lex
Au
tom
atic
74
Mo
del
AP
ipe
Tap
SP
M-1
5-D
M14
.94
1/4
SP
M-3
0-D
M16
.53
1/4
SP
M-6
5-D
M16
.90
1/4
SP
M-1
35-D
M21
.37
3/8
Dim
ensi
on
sD
up
lex
Man
ual
75
INSTALLATION DATA
SPM Single and Duplex Manual Models
SPM Single and Duplex Manual units are capable of supply-ing fuel oil to heating units or tanks located up to 200 feetabove the supply pumps. They are designed for use in main-tained pressure or open loop systems. Pump pressures canbe set at a range from 20 psi to 85 psi See Correct SupplyLine Size charts, for maximum discharge head.
Tank to Pump Connections
Connect suction line from the tank to preferred supply pumpinlet port. Connect return line from pump return port to tank.Internal 1/8" bypass plug (factory installed) must be in posi-tion for recommended two-pipe operation. Be certain allplugs and connections are secure and leak tight.
The correct suction line size can be determined by referringto the charts. Generally, the return line should be sized thesame as the suction line. Check valves in the suction linesbetween the tank and SPM units assure that pumps are fullof oil, ready for service. Check valves must be oil tight. Lowpressure drop swing type are recommended to minimize fric-tion loss.
For SPM Duplex Manual models, preferred installation callsfor a separate suction line from tank to pump for eachpump/motor unit. If system failure occurs because of a grossleak in the suction line of the primary unit, the second unitcan still provide backup service. Check valves can beinstalled in return lines to allow removal of inactive pump forservicing, while primary pump continues to run.
These typical installation diagrams, illustrating a maintainedpressure supply system or optional open loop system, forcontinuous pump operation, are shown for reference only.Compliance to all applicable codes where installed is the soleresponsibility of the installer.
76
*R
equi
red
if op
tiona
l ret
urn
loop
is n
ot u
sed
+N
ot s
uppl
ied
by W
ebst
er
+
+*
+
+ +
77
SPM Duplex Automatic Models
SPM Duplex Automatic units consist of two SPM Seriespump/motor assemblies and an electrical control panel. Theyare designed for use in maintained pressure supply systemsonly. if system pressure falls below a preset level, the controlautomatically switches from the primary pump/motor unit tothe secondary unit. If the backup pump/motor unit also failsto reach or maintain preset system pressure, the control alsoshuts off the backup unit.
A pump selector switch allows the two pump/motor units tobe manually alternated for even wear on each pump. Pumppressures can be set at a range from 20 psi to 85 psi. SeeCorrect Supply Line charts, for maximum discharge head.
Tank to Pump Connections
Units should be set for two-pipe operation. Preferred instal-lation calls for a separate suction line from tank to pump foreach pump/motor unit. If system failure occurs because of agross leak in the suction line of the primary unit, the secondunit can still provide backup service.
The correct suction line size can be determined by referringto the charts Generally, the return line should be sized thesame as the suction line. Low pressure drop, swing typecheck valves can be installed in the suction lines, assuringthat pumps are full of oil, ready for service. Check valves inreturn lines allow removal of inactive pump for servicing. Useof shutoff valves in return lines is not recommended. Be cer-tain all plugs and connections are secure and leak-tight.
+ Not supplied by Webster
+ +
78
+ + +
+
+
+
*
*R
equi
red
if op
tiona
l ret
urn
loop
is n
ot u
sed
+N
ot s
uppl
ied
by W
ebst
er