Water Circulation
Pumps & Circulators
PERFORMANCE CURVES
KV Vertical In-Line
Close Coupled Pumps
KS Vertical In-Line
Split Coupled Pumps
HYDRONIC COMPONENTS & SYSTEMS
Do it once.
Do it right.
© Taco Curve Book 300-1.2A
Effective Date March
1, 2012
January
31, 2004)
Effective
Date:(Supersedes
January 31, 2004
(Supersedes:
March 31, 2002)
FLOW IN GALLONS PER MINUTE
PC-1987 Rev D
HEAD IN KILOPASCALS (KPa)
HEAD IN FEET
HEAD IN METERS
CAPACITY IN LITERS/SEC
3
HEAD IN FEET
*
PC-2329 Rev –
* Pump Model 1013 is available
in 1160 rpm as KS only.
KV/KS Pump Quick Selection Curve
1160 RPM
FLOW IN GALLONS PER MINUTE
CAPACITY IN LITERS/SEC
HEAD IN KILOPASCALS (KPa)
HEAD IN METERS
4
*
PC-2328 Rev –
* Pump Model 1013 is available
in 1760 rpm as KS only.
KV/KS Pump Quick Selection Curve
1760 RPM
FLOW IN GALLONS PER MINUTE
CAPACITY IN LITERS/SEC
HEAD IN KILOPASCALS (KPa)
HEAD IN METERS
HEAD IN FEET
5
KV/KS Pump Quick Selection Curve
3500 RPM
FLOW IN GALLONS PER MINUTE
CAPACITY IN LITERS/SEC
PC-1987 Rev D
HEAD IN KILOPASCALS (KPa)
HEAD IN METERS
HEAD IN FEET
CORRECTION FACTORS FOR OTHER SPEEDS
For speeds other than 1750, hydraulic performance and B.H.P.
requirements must be corrected before a selection can be made.
The following multipliers are used to correct performance and B.H.P.
1150
1750
1450
1750
2900
3450
to
to
to
to
to
to
1750
1150
1750
1450
3450
2900
G.P.M.
1.52
Head
2.31
.28
1.21
1.46
.58
1.19
1.42
Sizing Procedure
1. Using the proper multipliers correct G.P.M. and head.
2. Make pump selection as usual using corrected performance.
3. Determine max. B.H.P. requirement for pump selected.
4. Correct B.H.P. using multiplier, to lower speed.
5. Select motor based on Step 4. Use service factor if applicable.
6
B.H.P.
.58
PUMP FORMULAS
Pressure
(PSI)
=
Head (Feet) x Specific Gravity
2.31
Head
(Feet)
=
Pressure (PSI) x 2.31
Specific Gravity
Vacuum
(Inches of Mercury)
=
Dynamic Suction Lift (Feet) x .883 x Specific Gravity
Horsepower
(Brake)
=
GPM x Head (Feet) x Specific Gravity
3960 x Pump Efficiency
Horsepower
(Water)
=
GPM x Head (Feet) x Specific Gravity
3960
Efficiency
(Pump)
=
Horsepower (Water) x 100 Per Cent
Horsepower (Brake)
NPSH
(Available)
=
Positive Factors – Negative Factors
Affinity Laws: Effect of change of speed or
impeller diameter on centrifugal pumps.
Impeller
Diameter
Change
Speed
Change
GPM Capacity
Ft. Head
BHP
D
Q2 = D22 Q1
D1
D 2
H2 = (D2)2 2 H1
D1
D 3
P2 = (D2)2 2 P1
D1
RPM
Q2 = RPM22 Q1
RPM1
RPM2 2
H2 = (RPM2)2
H1
RPM1
RPM2 3
P2 = (RPM2)2
P1
RPM1
Where Q = GPM, H = Head, P = BHP, D = Impeller Dia., RPM = Pump Speed
7
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
9
.7
5B
HP
9
10
12
P
BH
1.5
14
15
16
2B
HP
17
18
P
H
5B
P
BH
7.5
19
20
P
H
2B
21
MAY 1, 2010
P
BH
7.5
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
10
P
BH
P
H
5B
7.
23
24
MAY 1, 2010
HP
3B
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
32
P
BH
15
25
BH
P
33
34
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
1.
5B
HP
HP
1B
35
37
38
P
BH
1.5
3BH
P
39
40
HP
5B
7.
P
BH
10
41
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
44
1.
5B
HP
45
46
HP
5B
7.
15
BH
P
47
48
P
BH
25
MAY 1, 2010
7.5
B
HP
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
15
BH
P
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
P
BH
30
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
57
58
P
BH
40
P
BH
60
59
50B
HP
61
62
HP
0B
10
63
74
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
66
P
BH
10
MAY 1, 2010
P
BH
50
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
77
78
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
70
15
BH
P
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
81
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
84
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0
P
BH
75
MAY 1, 2010
CURVES BASED ON CLEAR WATER
WITH SPECIFIC GRAVITY OF 1.0