performance curves - cfg.cleaver-brooks.comcfg.cleaver-brooks.com/cbdocuments/da/pump data cr10...
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33
Performance curves Low-NPSH pumpsCR 10, CRI 10, CRN 10
TM0
2 83
80 2
00
4 C
R 1
0
0 5 10 15 20 25 30 35 40 45 50 55 60 Q [US GPM]
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
[ft]H
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Q [m³/h]
0
20
40
60
80
100
120
140
160
180
200
220
240
[m]H
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
[ft]H
CR 10
2-pole, 60 Hz
CRI 10
CRN 10
-17
-16
-14
-12
-10
-9
-8
-7
-6
-5
-4
-3
0 5 10 15 20 25 30 35 40 45 50 55 60 Q [US GPM]
0.0
0.2
0.4
0.6
0.8[hp]P2
0
20
40
60
80
Eff[%]
0.0
0.2
0.4
[kW]P2
P2Eff
0 5 10 15 20 25 30 35 40 45 50 55 60 Q [US GPM]
0
5
10
15
[ft]NPSH
0
5
10
15
[ft]NPSH
0
2
4
[m]H
Low NPSHR
NPSHR
23
How to read the curve charts
Fig. 27 How to read the curve charts
Guidelines to performance curvesThe guidelines below apply to the curves shown on thefollowing pages:
1. The motors used for the measurements are standard motors (ODP, TEFC or MLE).
2. Measurements have been made with airless water at a temperature of 68°F.
3. The curves apply to a kinematic viscosity ofυ = 1 mm2/s (1 cSt).
4. Due to the risk of overheating, the pumps shouldnot be used at a flow below the minimum flow rate.
5. The QH curves apply to actual speed with the motor types mentioned at 60 Hz.
The curve below shows the minimum flow rate as apercentage of the nominal flow rate in relation to theliquid temperature. The dotted line shows a CR pumpfitted with an air-cooled top assembly.
Fig. 28 Minimum flow rate
TM0
2 0
039
130
3
0 20 40 60 80 100 120 140 160 180 200 Q [US GPM]
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000[ft]H
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000[ft]H
0
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
[m]H
0 5 10 15 20 25 30 35 40 45 Q [m³/h]
CR(E) 32
2-pole, 60 Hz
CRN(E) 32 -11-2
-10
-1 (E) -1-1 (E)
-10-2
-2 (E) -2-1 -2-2
-3
-3-2 (E)
-4
-4-2
-5
-5-2
-6
-6-2
-7
-7-2
-8
-8-2
-9
-9-2
0 20 40 60 80 100 120 140 160 180 200 Q [US GPM]
0
1
2
3
4
P2[hp]
0
20
40
60
80[%]Eff
0
1
2
P2[kW]
P2 1/1
P2 2/3
Eff
0 20 40 60 80 100 120 140 160 180 200 Q [US GPM]
0
10
20
30
NPSH[ft]
0
10
20
30[ft]H
0
4
8
[m]H
NPSHR
Number of stages.First figure: number of stages; second figure: number of reduced-diameter impellers.
The power curves indicatepump input power per stage.Curves are shown for complete(1/1) and for reduced-diameter(2/3) impellers.
Pump type, number of polesand frequency.
QH curve for the individual pump.The bold curves indicate the recom-mended performance range for best efficiency.
The eff curve shows the efficiency of the pump. The eff curve is an average curve of all the pump types shown in the chart.The efficiency of pumps with reduced-diameter impellers is approx. 2% lower than the eff curve shown in the chart.
The NPSHR curve is an averagecurve for all the variants shown.When sizing the pumps, add asafety margin of at least 2.0 feet.
TM0
2 75
38 3
703
40 60 80 120 140 160 180 t [°F]
0
10
20
30
Qmin[%]
140 176 212 248 284 320 356104
Selection and sizing Vertical multistage centrifugal pumps
CrCriCrn.book Page 23 Monday, November 15, 2004 11:32 AM
13
Vertical multistage centrifugal pumpsConstruction
CR(E) 1s, 1, 3, 5, 10, 15 and 20
Sectional drawing
Materials: CR(E)
1) CR(E) 1s, 1, 3, 52) CR(E) 10, 15, 203) Stainless steel available on request.4) CF 8M is cast equivalent of AISI 316 stainless steel.5) CRI(E)/CRN(E) 1s, 1, 3, 56) CRN(E) 10, 15, 207) CRI(E) 10, 15, 20
CRI(E), CRN(E) 1s, 1, 3, 5, 10, 15 and 20
Sectional drawing
Materials: CRI(E), CRN(E)
TM0
2 11
98
06
01
- GR7
377
- GR
7379
TM0
2 11
94
140
3
Pos. Designation Materials AISI/ASTM
1 Pump head Cast iron A 48-30 B
3 Shaft Stainless steelAISI 316 1)
AISI 431 2)
4 Impeller Stainless steel AISI 304
5 Chamber Stainless steel AISI 304
6 Outer sleeve Stainless steel AISI 304
7O-ring for outer sleeve
EPDM or FKM
8 Base Cast iron A 48-30 B
9 Neck ring PTFE
10 Shaft seal Cartridge type
Bearing rings Silicon carbide
Rubber parts EPDM or FKM
1
3
10
4
5
9
8
67
TM0
2 18
08
200
1 - G
R73
73 -
GR
7375
TM0
2 11
95
140
3
Pos. Designation Materials AISI/ASTM
1 Pump head Cast iron 3) A 48-30 B
2 Pump head cover Stainless steel CF 8M 4)
3 Shaft Stainless steelAISI 316 5)
AISI 329 6)
AISI 431 7)
8 Base Stainless steel CF 8M4)
9 Neck ring PTFE
10 Shaft seal Cartridge type
11 Base plate Cast iron 3) A 48-30 B
Bearing rings Silicon carbide
Rubber parts EPDM or FKM
CRI(E)
4 Impeller Stainless steel AISI 304
5 Chamber Stainless steel AISI 304
6 Outer sleeve Stainless steel AISI 304
7 O-ring for outer sleeve EPDM or FKM
CRN(E)
4 Impeller Stainless steel AISI 316
5 Chamber Stainless steel AISI 316
6 Outer sleeve Stainless steel AISI 316
7 O-ring for outer sleeve EPDM or FKM
1
2 10
4
5
9
8
6
3
11
7
CrCriCrn.book Page 13 Monday, November 15, 2004 11:32 AM