WE HAVE ALL THE TICKS · 16 m3/h 0 4 8 12 16 20 24 28 32 36 40 m OT-100-248 Discharge Diameter...
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OT SELF PRIMING PUMPS
Transcript of WE HAVE ALL THE TICKS · 16 m3/h 0 4 8 12 16 20 24 28 32 36 40 m OT-100-248 Discharge Diameter...
OTSELF PRIMING PUMPS
Version 1 - OT: Rapid Allweiler PumpsWhilst all care has been taken to ensure the accuracy of the information contained in this brochure was correct at the time of printing, please be advised we cannot be held responsible for any errors contained within and or changes that may have taken place. Dimensions contained within are for reference purpose only and should not be used for construction; certified drawings are available upon request. For confirmation of any information contained herewith please contact a member of our technical sales team.
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WE HAVE ALL THE TICKS
RA Pump Range
Minimum Flow (m3/h)
Maximum Flow (m3/h)
Minimum Head (m)
Maximum Head (m)
Maximum Temperature
OT 5 1200 3 40 80˚C
DESIGN & CONSTRUCTION The pump casings are manufactured from high grade Cast Iron and have sufficient overall volume for reliable priming and re-priming without the need for external priming equipment.
Replaceable wear plates in the event that abrasive applications occur.
Back pull out arrangement which allows the entire rotating assembly to be removed without disturbing the suction and discharge pipe work or the electric motor, provided a spacer coupling is incorporated.
Semi open type impellers which allow for the passing of large solids (up to 76mm). Sizes available from 50mm up to 300mm all based on the principal of self-priming which will exceed 6 meters at sea level.
Shaft Seal Mechanical Seal: Silicon-Silicon/Viton.
Flanges B.S. 4504 flanges are rated for 10 bar and drilled to EN 1092.1 (DIN 2532).
MATERIALS OF CONSTRUCTIONCasing: Cast IronImpeller: Ductile Iron, Bronze, Stainless SteelWear Plate: Ductile Iron, Bronze, Stainless SteelShaft: Carbon Steel 1045 Stainless Steel 304 Stainless Steel 316
MODEL DESCRIPTIONOT-80-223-CI-BR-SS Shaft Material Impeller and Wear Plate Material Casing Material Impeller Nominal Size (mm) Suction and Discharge Size (mm)Self Priming Centrifugal Sewage Pump
OTSELF PRIMING PUMPS
APPLICATION Sewage Water Treatment Sugar Pulp and Paper Industry Civil Engineering Agriculture Raw water
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OTSELF PRIMING PUMPS
SECTIONAL DRAWING
Volute
Ball Bearing
Double Angular Contact Roller Bearing
Mechanical Seal
Pressure Relief Valve(optional)
RemovableCoverplate
BalancedImpeller
ReplaceableWearplate
Suction Inlet
Flap Valve
DischargeOutlet
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TOMBSTONE CURVE
FLOW RATE(Q)
3
4
5
6
8
10
2
7 11 18 22 29 36 72 108 144 180 218 288 380 540 720 1080 M/Hr
L/S3 4 5 6 8 10 20 30 40 50 60 80 100 150 200 300
20
30
40
50
60
80
50-160 80-223 100-248 150-315 200-375 250-375 300-457
2900RPM
1150RPM
2150RPM
650 RPM
1950RPM
650 RPM
1550RPM
650 RPM
1350RPM
650 RPM
1450RPM
650 RPM
1250RPM
650 RPM
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OTSELF PRIMING PUMPS
DIMENSIONSShaft
Model: OT250-375 Model: OT300-457
Models: OT50-160, OT80-223, OT100-248,OT150-315 and OT200-375
BC
E
D
F
KQ
IH
G
L
J
E F G N
O
L J
H
IID
BA MC
E
D
F GJ
H
B
N OA
C
LM
OTSELF PRIMING PUMPS
OT-
80-2
23D
isch
arge
Dia
met
er
80
mm
Suct
ion
Dia
met
er
80
mm
Issu
e D
ate
Sep
tem
ber
20
12
650
- 215
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
m
5
NPSH @ 2900 RPM
m
10
8
6
4
2
0
OT-
50-1
60D
isch
arge
Dia
met
er
50
mm
Suct
ion
Dia
met
er
50
mm
Issu
e D
ate
Sep
tem
ber
20
12
1150
- 29
00rp
mBas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
OTSELF PRIMING PUMPS
OT-
150-
315
Dis
char
ge D
iam
eter
1
50
mm
Suct
ion
Dia
met
er
15
0m
mIs
sue
Dat
eS
epte
mb
er 2
01
2
650
- 155
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
4
8
12
16
m3/h
0
4
8
12
16
20
24
28
32
36
40
m
OT-
100-
248
Dis
char
ge D
iam
eter
1
00
mm
Suct
ion
Dia
met
er
10
0m
mIs
sue
Dat
eS
epte
mb
er 2
01
2
650
- 195
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
m
6
CHAR
ACTE
RIS
TIC
CUR
VEO
T-25
0-37
5D
isch
arge
Dia
met
er
25
0m
mSu
ctio
n D
iam
eter
2
50
mm
Issu
e D
ate
Sep
tem
ber
20
12
650
- 145
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
OTSELF PRIMING PUMPS
OT-
200-
375
Dis
char
ge D
iam
eter
2
00
mm
Suct
ion
Dia
met
er
20
0m
mIs
sue
Dat
eS
epte
mb
er 2
01
2
650
- 135
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
m
4
8
12
16
7
m
OT-
300-
457
Dis
char
ge D
iam
eter
3
00
mm
Suct
ion
Dia
met
er
30
0m
mIs
sue
Dat
eS
epte
mb
er 2
01
2
650
- 125
0rpm
Bas
ed o
n w
ater
den
sity
100
0 kg
/m3
and
visc
osity
1 c
St.
Hea
d, c
apac
ity a
nd e
ffic
ienc
y ac
cord
ing
to I
SO
Sta
ndar
d 25
48
CHAR
ACTE
RIS
TIC
CUR
VE
OTSELF PRIMING PUMPS
8
m
OTSELF PRIMING PUMPS
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Centrifugal and Axial Flow Pump Affinity Laws:
Speed changes & impeller diameter remains the same:
Q1/Q2 = N1/N2
H1/H2 = (N1/N2)²
P1/P2 = (N1/N2)³
Impeller diameter changes and speed remains the same:
Q1/Q2 = D1/D2
H1/H2 = (D1/D2)²
P1/P2 = (D1/D2)³
BASIC FORMULAS Q = Flow(m³/h)H= Head(m) Density = SGEff = Pump Eff%
Capacity
l/sec x 3.6 = m³/h m³/h ÷ 3.6 = l/sec
US gpm ÷ 0.246 = l/min l/min x 0.246 = US gpm
Imp gpm x 0.2271 = m³/h m³/h x 4.403 = Imp gpm
10000 kg/hr =10m³h
Density(SG)
Head/Pressure
Ft ÷ 3.28 = m m x 3.28048 = Ft
m x 9.805 = kpa kpa x 0.102 = m
m x 1.45 = psi
Bar x 10.19 = m
Bar x 100 = kpa
m x 0.098 = Bar
psi x 6.895 = kpa
Efficiency
EFF(%) = Q x H x SG
367 x kw(abs)
Q x H x SG367 x Eff(%)
Power
hp x 0.746 = kw kw x 1.340483 = hp
kw abs =
Hz x 120No of Poles
RPM =
RPM x No Of Poles120
Hz =
Q x 353.63(Pipe Dia)²
Velocity m/sec =
Amps x Volts x Power Factor x 1.7321000
kw =
Temperature
Deg.C = (deg.F-32) x 0.556
Deg.F = (1.8 x deg.C) + 32
imp.dia.(mm) x π x N(Rpm)60 x 1000
Peripheral Speed
Peripheral Speed(Impeller) =
QvisCQ
Qw =
C% x %wQw =
Qvis x Hvis x Pvis367 x Eff(%) vis
Pvis =
HvisCH
Hw =
Viscosity
vis Viscous Liquid
w Water
Given: Qvis in m³/h
Hvis in m
kinematic viscosity v in mm²/s
pvis in kg/dm³
08600 RAPID
10 Girder Street • Isando • 1601T: +27 11 573 7400 • F: +27 11 974 8757
www.rapidallweiler.co.za
