PUMP SELECTION – EXAMPLE 1...Section D - Part 3 Issue No.: 3 Page 3.1 Issue Date : 1 July 2005...
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PUMP SELECTION – EXAMPLE 1 Duty Capacity : 20 m 3 /hr Viscosity : 100 CPS Discharge : 7 Bar Step 1 Select pump model, using Viscosity Limitations Graph (Section D - Part 2 Page 2.3). Model R32. Step 2 Using Performance graph R32S, find point A, using Viscosity and Discharge Pressure. Step 3 The diagonal dotted line from A, gives pumps performance at any flow rate, at these viscosity and pressure conditions. Step 4 Using capacity of 20 m 3 /hr, find point B. From this point, by projecting vertically upwards and downwards, the following can be found: C Pump speed : 900 RPM D Power required : 5.6 kW E Maximum pressure : 8 Bar F Maximum viscosity : 7 Poise (700 CPS) G NPSH required : 4.5 Metres Section D - Part 3 Issue No.: 3 Page 3.1 Issue Date : 1 July 2005 Back
PUMP SELECTION – EXAMPLE 1...Section D - Part 3 Issue No.: 3 Page 3.1 Issue Date : 1 July 2005 Back PUMP SELECTION EXAMPLE No 1 r.p.m. 100 200 300 400 500 600 700 800 900 1000 BAR
PUMP SELECTION – EXAMPLE 1 Duty Capacity : 20 m3/hr Viscosity :
100 CPS Discharge : 7 Bar Step 1 Select pump model, using Viscosity
Limitations Graph (Section D - Part 2 Page 2.3). Model R32. Step 2
Using Performance graph R32S, find point A, using Viscosity and
Discharge Pressure. Step 3 The diagonal dotted line from A, gives
pumps performance at any flow rate, at these viscosity and pressure
conditions. Step 4 Using capacity of 20 m3/hr, find point B. From
this point, by projecting vertically upwards and downwards, the
following can be found: C Pump speed : 900 RPM D Power required :
5.6 kW E Maximum pressure : 8 Bar F Maximum viscosity : 7 Poise
(700 CPS) G NPSH required : 4.5 Metres Section D - Part 3 Issue
No.: 3 Page 3.1 Issue Date : 1 July 2005
Back
PUMP SELECTIONEXAMPLE No 1
r.p.m. 100 200 300 400 500 600 700 800 900 1000
BAR
1
2
3
5
7
10
14.5
29
43.5
72.5
10.15
145
10 CP
50 CP
100 CP
300 CP
200 CP
P.S.I.
1 CP
10BA
R
8 BAR
6 BAR
2 BAR
1 BAR
4 BAR
7.5
5.5
4
3
2.2
1.5
1.1
KW
POWER VISCOSITY
24
20
15
10
5
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6340
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5729
0
300 130 65 43 28 21 17
10 9
11
3.61.5 2.1 2.8
8 7
4
5.5
7
MAX PRESSURE (BAR)
MAX VISCOSITY (POISE)
NPSHR (METRE)
US
.gp
h
IMP.g
ph
M3/h
B
C
A
E
F
G
ROTOFLO R32SPERFORMANCE CURVE
D
D212Section D - Part 3
Page 3.2 Issue Date : 1 July 2005 Issue No. : 3
PUMP SELECTION – EXAMPLE 2 Duty Capacity : 20 m3/hr Viscosity :
6 000 CPS Discharge : 7 Bar Step 1 Select pump model, using
Viscosity Limitations Graph (Section D - Part 2 Page 2.3). Model
R42. Step 2 Using Performance graph R42, find point A, using
Viscosity and Discharge Pressure. Step 3 The diagonal dotted line
from A, gives pumps performance at any flow rate, at these
viscosity and pressure conditions. Step 4 Using capacity of 20
m3/hr, find point B. From this point, by projecting vertically
upwards and downwards, the following can be found: C Pump speed :
300 RPM D Power required : 5 kW E Maximum pressure : 10 Bar F
Maximum viscosity : 120 Poise (12 000 CPS) G NPSH required : 1.9
Metres Section D - Part 3 Issue No.: 3 Page 3.3 Issue Date : 1 July
2005
