Npsh Calculator For Process Engineer 4n2r1x
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NPSH Calculator Author: Dimitrii Pokrovskii [email protected] www.engineering-bear.com
www.azpiping.com
Nov. 16th, 2007, Brought to you by
with permittance from Author
1 - Start
2
Pump Operating Parameters
System Inlet Height Configu Open System:
Fluid Temperature (through the pump): Total Pump Volumetric Flow Rate:
(32 - 212 F)
Atmospheroc Pressure:
(can't change)
Fluid Vapor Pressure:
45 0 14.7 33.957 0.7516
liquid level
33.96
Water Vapor Pres. @ Sea Level
Vapor Pres.(ft. Water)
40 35 f(x) = 7.1929E-06x^3 - 9.8352E-04x^2 + 4.6395E-02x
30 25 20 15 10 5 0 60
80
100
120
140
160
Temperature Deg. F
180
liquid level
Surface Pressure 0
Water Vapor Pressure Reference Table Water Temp. Vapor Pressure (Deg. F) (ft. Water) 80 1 100 2 120 4 140 7 180 18 200 28 212
deg. F gpm PSI ft. Water (ft. Water)
200
220
Each sub system is defined by a fitting that either changes the pipe size or a Tee that combines or separates flow.
from Author
2
3
Inlet Height Configuration
System Piping Configuration 1 Pipe Type
Schedule 40 1 0 0
Pipe Size (Nominal) Pipe Length Flow Rate (Positive) Height h
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through branch -
inlet Surface Pressure PSIG inlet -h (Negative) Height
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
(Optional)
4 Height:
Static Head 0 ft.
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through br -
Schedule 40 1 0 0
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Design Calculator - Do not Edit Values Here
Total Fitting Eq. L NA NA NA NA Ref. NA NA NA NA NA 1 4 2 5 3 6
Nominal Diam.
Pipe Length (ft.) NA NA NA NA NA NA NA NA NA 0 0 0 0 0 0
0 0 0 0 0 0
1 2 3 4 5 6 8 10 12 14 1 1 1 1 1 1
ID (inch) 1.049 2.067 3.068 4.026 5.047 6.065 8.071 10.136 12.09 13.125 1.049 1.049 1.049 1.049 1.049 1.049
3 - When You're Done W/ Step 3 - Press the Calculate NPSH Button (Optional)
2 inch ft gpm
Total
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through Stand. Tee - flow throug -
0 0 0 0 0 0 0 0 0 0 0
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
(Optional)
5 inch ft gpm
Total 0 0 0 0 0 0 0 0 0 0 0
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through Stand. Tee - flow throug -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
Rel. Roughness e=
Pipe ID Area (inch^2) 0.8642529244 3.3556050137 7.3926576024 12.730264362 20.005826166 28.890262757 51.161653963 80.690626069 114.80015729 135.29710549 0.8642529244 0.8642529244 0.8642529244 0.8642529244 0.8642529244 0.8642529244
Flow GPM NA NA NA NA NA NA NA NA NA NA
Flow (ft^3/s)
0 0 0 0 0 0
0.001
Velocity (ft/s) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Re 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
0 0 0 0 0 0 0 0 0
0.000 0.000 0.000 0.000 0.000 0.000
0 0 0 0 0 0
e/D 0.00095329 0.00048379 0.00032595 0.00024839 0.00019814 0.00016488 0.0001239 9.866E-005 8.271E-005 7.619E-005 0.0009533 0.0009533 0.0009533 0.0009533 0.0009533 0.00095329
Friction Factor NA NA NA NA NA NA NA NA NA 0 0.012915 0.011802 0.012284 0.011514 0.012185 0.011514 Total Frictional Head
ate NPSH Button (Optional)
3
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow thro Stand. Tee - flow thro -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
(Optional)
6
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow thro Stand. Tee - flow thro -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
Safety Factor Piping Fittings
HEAD Fittings NA NA NA NA NA NA NA NA NA NA
1.3 1.3 HEAD LOSS
Head Pipe NA NA NA NA NA NA NA NA NA NA
0 0 0 0 0 0 0 0 0 0 0 0 Total Frictional Head Loss:
Sum NA NA NA NA NA NA NA NA NA NA 0 0 0 0 0 0 ft. water 0 PSI 0
319596947.xls
Date: Job Name: Drawings / Page: Max GPM:
NPSH Calculation
5/29/2016 23:49
Address:
Constants / Assumptions: Mean Operating Fluid Temperature:
45 ºF
Total Flow Through Pump:
0 gpm
Pumped Fluid: WATER
Vapor Pressure of Liquid:
0.75 ft. water
Atmospheric Pressure:
14.70 PSIA
33.96 ft. Water
Surface Pressure:
0 PSIG
(if exposed to air surface pressure = 0)
Piping Configuration: Pipe Sub System#: Pipe Diam. (Nom): Pipe Length: Flow Rate:
1
2
1 inch 0 feet 0 gpm
Pipe Pressure Drop: 0.0 ft. Water 0.0 psi Valves (Fully Open) / Fittings
90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through branch Eq. Length Total:
Qt. 0 0 0 0 0 0 0 0 0 0
Additonal Pressure Drops:
Qt. 0 0 0 0 0 0 0 0 0 0
2 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
4
1 inch 0 feet 0 gpm
0.0 ft. Water 0.0 psi
1 Eq. Length Total 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 0 0
Fitting Pressure Drop: 0.0 ft. water 0.0 psi
3
1 inch 0 feet 0 gpm 0.0 0.0
Total
Qt. 0 0 0 0 0 0 0 0 0 0 0
0.0 ft. water 0.0 psi Description input here input here input here input here input here Total:
ft. Water psi
0 0 0 0 0 0 0 0 0 0
3 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
ft. water psi
0.0 0.0 0.0 0.0 0.0 0.0
ft. water ft. water ft. water ft. water ft. water ft. water
5
1 inch 0 feet 0 gpm 0.0 0.0
Total
ft. Water psi
Qt. 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0.0 0.0
6
1 inch 0 feet 0 gpm
4 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
Total
ft. Water psi
Qt. 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
ft. water psi
0.0 0.0
1 inch 0 feet 0 gpm
5 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
Total
Qt. 0 0 0 0 0 0 0 0 0 0 0
ft. water psi
Total 0.0 0.0
ft. Water psi
0 0 0 0 0 0 0 0 0 0
0.0 0.0
6 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
Total 0 0 0 0 0 0 0 0 0 0 0
ft. water psi
Total 0 0.0 0.0
Total Head Loss (Pipe + Fittings + Additional Drops) :
0.0
Results (Static Head)
NPSHA
(Vapor Pressure)
+ + = 34.0 0.0 0.0 (Atmospheric Pressure) (Surface Pressure) Net Positive Suction Head Available Pump Schedule #: MFR: Model #:
0.8
(Loss in Fittings)
-
0.0 (Loss in Pipe Length)
0.0
NPSHA
-
0.0 (Additonal Loss)
=
NPSHR Net Positive Suction Head Required (From Pump Curve)
33.21
ft. Water
0
ft. Water
Safety Factor Enter NPSHR
Air Systems Confidential
05/29/2016
Page 9
PDF Table of Schedule 40 & 80 Pipe Geometry Nom. Diam. Inchs 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 24
Schedule 80
Schedule 40
ID ID Inches Inches 0.269 0.215 0.364 0.302 0.493 0.423 0.622 0.546 0.824 0.742 1.049 0.957 1.38 1.278 1.61 1.5 2.067 1.939 2.469 2.323 3.068 2.9 3.548 3.364 4.026 3.826 5.047 4.813 6.065 5.761 7.981 7.625 10.02 9.564 11.938 11.376 13.124 12.5 15 14.314 16.874 16.126 18.814 17.938 22.626 21.564
This Data is for Development Purposes
Note: Trying tofigure out how my fluids results compare to the table values found in the hand looks like there is a safety factor associated with the table values when compared to the the Pressure Drop in 100 ft. of Pipe My Value Flow Wheel DI GPM 1.85 2.4 3 100 1.5 1.95 3 90 0.92 1.2 3 70 0.68 0.9 3 60 2.7 2.7 5 400 1.6 1.6 5 300 2.4 2.3 6 700 1.2 1.3 8 900 1.5 1.6 8 1000
Rel. Roughtness e = 0.001 Ratio 1.0 Rel. Roughness e = 0.001 Ration 1.3
3
ASHRAE Value
2.5
f(x) = 1.0015544041x
2 1.5 1 0.5 0 1
1.2 1.4 1.6 1.8
My Value
2
2.2 2.4 2.6 2.8
re to the table values found in the handbook and the pump wheel table values when compared to the theoretical values. More testing needs to be done with a wider range of flows and pipe sizes 3
ASHRAE Value
2.5 2 1.5
f(x) = 1.3007606033x
1 0.5 0 0.6
0.8
1
1.2 1.4 M y Value
1.6
1.8
2
of flows and pipe sizes
ASI-NPSH Calculator VS HVAC PUMP Handbook
1000 1500 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 5000
Asi Calculator Head Loss for 100 ft of Pipe (ft of Water)
Handbook Head Loss for 100ft of Pipe (ft of Water)
Flow Rate (GPM)
HVAC PUMP Handbook - Author: James B. Rishel
www.azpiping.com
Nov. 16th, 2007, Brought to you by
with permittance from Author
1 - Start
2
Pump Operating Parameters
System Inlet Height Configu Open System:
Fluid Temperature (through the pump): Total Pump Volumetric Flow Rate:
(32 - 212 F)
Atmospheroc Pressure:
(can't change)
Fluid Vapor Pressure:
45 0 14.7 33.957 0.7516
liquid level
33.96
Water Vapor Pres. @ Sea Level
Vapor Pres.(ft. Water)
40 35 f(x) = 7.1929E-06x^3 - 9.8352E-04x^2 + 4.6395E-02x
30 25 20 15 10 5 0 60
80
100
120
140
160
Temperature Deg. F
180
liquid level
Surface Pressure 0
Water Vapor Pressure Reference Table Water Temp. Vapor Pressure (Deg. F) (ft. Water) 80 1 100 2 120 4 140 7 180 18 200 28 212
deg. F gpm PSI ft. Water (ft. Water)
200
220
Each sub system is defined by a fitting that either changes the pipe size or a Tee that combines or separates flow.
from Author
2
3
Inlet Height Configuration
System Piping Configuration 1 Pipe Type
Schedule 40 1 0 0
Pipe Size (Nominal) Pipe Length Flow Rate (Positive) Height h
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through branch -
inlet Surface Pressure PSIG inlet -h (Negative) Height
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
(Optional)
4 Height:
Static Head 0 ft.
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through br -
Schedule 40 1 0 0
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Design Calculator - Do not Edit Values Here
Total Fitting Eq. L NA NA NA NA Ref. NA NA NA NA NA 1 4 2 5 3 6
Nominal Diam.
Pipe Length (ft.) NA NA NA NA NA NA NA NA NA 0 0 0 0 0 0
0 0 0 0 0 0
1 2 3 4 5 6 8 10 12 14 1 1 1 1 1 1
ID (inch) 1.049 2.067 3.068 4.026 5.047 6.065 8.071 10.136 12.09 13.125 1.049 1.049 1.049 1.049 1.049 1.049
3 - When You're Done W/ Step 3 - Press the Calculate NPSH Button (Optional)
2 inch ft gpm
Total
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through Stand. Tee - flow throug -
0 0 0 0 0 0 0 0 0 0 0
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
(Optional)
5 inch ft gpm
Total 0 0 0 0 0 0 0 0 0 0 0
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through Stand. Tee - flow throug -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
Rel. Roughness e=
Pipe ID Area (inch^2) 0.8642529244 3.3556050137 7.3926576024 12.730264362 20.005826166 28.890262757 51.161653963 80.690626069 114.80015729 135.29710549 0.8642529244 0.8642529244 0.8642529244 0.8642529244 0.8642529244 0.8642529244
Flow GPM NA NA NA NA NA NA NA NA NA NA
Flow (ft^3/s)
0 0 0 0 0 0
0.001
Velocity (ft/s) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Re 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
0 0 0 0 0 0 0 0 0
0.000 0.000 0.000 0.000 0.000 0.000
0 0 0 0 0 0
e/D 0.00095329 0.00048379 0.00032595 0.00024839 0.00019814 0.00016488 0.0001239 9.866E-005 8.271E-005 7.619E-005 0.0009533 0.0009533 0.0009533 0.0009533 0.0009533 0.00095329
Friction Factor NA NA NA NA NA NA NA NA NA 0 0.012915 0.011802 0.012284 0.011514 0.012185 0.011514 Total Frictional Head
ate NPSH Button (Optional)
3
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow thro Stand. Tee - flow thro -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
(Optional)
6
Pipe Type Pipe Size (Nominal) Pipe Length Flow Rate
Fittings 90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow thro Stand. Tee - flow thro -
Schedule 40 1 inch 0 ft 0 gpm
Qt.
Eq. Length 0 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 Total Eq. Length
Total 0 0 0 0 0 0 0 0 0 0 0
Safety Factor Piping Fittings
HEAD Fittings NA NA NA NA NA NA NA NA NA NA
1.3 1.3 HEAD LOSS
Head Pipe NA NA NA NA NA NA NA NA NA NA
0 0 0 0 0 0 0 0 0 0 0 0 Total Frictional Head Loss:
Sum NA NA NA NA NA NA NA NA NA NA 0 0 0 0 0 0 ft. water 0 PSI 0
319596947.xls
Date: Job Name: Drawings / Page: Max GPM:
NPSH Calculation
5/29/2016 23:49
Address:
Constants / Assumptions: Mean Operating Fluid Temperature:
45 ºF
Total Flow Through Pump:
0 gpm
Pumped Fluid: WATER
Vapor Pressure of Liquid:
0.75 ft. water
Atmospheric Pressure:
14.70 PSIA
33.96 ft. Water
Surface Pressure:
0 PSIG
(if exposed to air surface pressure = 0)
Piping Configuration: Pipe Sub System#: Pipe Diam. (Nom): Pipe Length: Flow Rate:
1
2
1 inch 0 feet 0 gpm
Pipe Pressure Drop: 0.0 ft. Water 0.0 psi Valves (Fully Open) / Fittings
90 Ells 45 Ell Globe Valve Angle Valve Ball Valve BF-Valve Ck-Valve Stand. Tee - flow through run Stand. Tee - flow through branch Eq. Length Total:
Qt. 0 0 0 0 0 0 0 0 0 0
Additonal Pressure Drops:
Qt. 0 0 0 0 0 0 0 0 0 0
2 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
4
1 inch 0 feet 0 gpm
0.0 ft. Water 0.0 psi
1 Eq. Length Total 20 0 16 0 340 0 150 0 8 0 29.9 0 55 0 20 0 60 0 0 0 0
Fitting Pressure Drop: 0.0 ft. water 0.0 psi
3
1 inch 0 feet 0 gpm 0.0 0.0
Total
Qt. 0 0 0 0 0 0 0 0 0 0 0
0.0 ft. water 0.0 psi Description input here input here input here input here input here Total:
ft. Water psi
0 0 0 0 0 0 0 0 0 0
3 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
ft. water psi
0.0 0.0 0.0 0.0 0.0 0.0
ft. water ft. water ft. water ft. water ft. water ft. water
5
1 inch 0 feet 0 gpm 0.0 0.0
Total
ft. Water psi
Qt. 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0.0 0.0
6
1 inch 0 feet 0 gpm
4 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
Total
ft. Water psi
Qt. 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
ft. water psi
0.0 0.0
1 inch 0 feet 0 gpm
5 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
0.0 0.0
Total
Qt. 0 0 0 0 0 0 0 0 0 0 0
ft. water psi
Total 0.0 0.0
ft. Water psi
0 0 0 0 0 0 0 0 0 0
0.0 0.0
6 Eq. Length 20 16 340 150 8 29.9 55 20 60 0
Total 0 0 0 0 0 0 0 0 0 0 0
ft. water psi
Total 0 0.0 0.0
Total Head Loss (Pipe + Fittings + Additional Drops) :
0.0
Results (Static Head)
NPSHA
(Vapor Pressure)
+ + = 34.0 0.0 0.0 (Atmospheric Pressure) (Surface Pressure) Net Positive Suction Head Available Pump Schedule #: MFR: Model #:
0.8
(Loss in Fittings)
-
0.0 (Loss in Pipe Length)
0.0
NPSHA
-
0.0 (Additonal Loss)
=
NPSHR Net Positive Suction Head Required (From Pump Curve)
33.21
ft. Water
0
ft. Water
Safety Factor Enter NPSHR
Air Systems Confidential
05/29/2016
Page 9
PDF Table of Schedule 40 & 80 Pipe Geometry Nom. Diam. Inchs 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 24
Schedule 80
Schedule 40
ID ID Inches Inches 0.269 0.215 0.364 0.302 0.493 0.423 0.622 0.546 0.824 0.742 1.049 0.957 1.38 1.278 1.61 1.5 2.067 1.939 2.469 2.323 3.068 2.9 3.548 3.364 4.026 3.826 5.047 4.813 6.065 5.761 7.981 7.625 10.02 9.564 11.938 11.376 13.124 12.5 15 14.314 16.874 16.126 18.814 17.938 22.626 21.564
This Data is for Development Purposes
Note: Trying tofigure out how my fluids results compare to the table values found in the hand looks like there is a safety factor associated with the table values when compared to the the Pressure Drop in 100 ft. of Pipe My Value Flow Wheel DI GPM 1.85 2.4 3 100 1.5 1.95 3 90 0.92 1.2 3 70 0.68 0.9 3 60 2.7 2.7 5 400 1.6 1.6 5 300 2.4 2.3 6 700 1.2 1.3 8 900 1.5 1.6 8 1000
Rel. Roughtness e = 0.001 Ratio 1.0 Rel. Roughness e = 0.001 Ration 1.3
3
ASHRAE Value
2.5
f(x) = 1.0015544041x
2 1.5 1 0.5 0 1
1.2 1.4 1.6 1.8
My Value
2
2.2 2.4 2.6 2.8
re to the table values found in the handbook and the pump wheel table values when compared to the theoretical values. More testing needs to be done with a wider range of flows and pipe sizes 3
ASHRAE Value
2.5 2 1.5
f(x) = 1.3007606033x
1 0.5 0 0.6
0.8
1
1.2 1.4 M y Value
1.6
1.8
2
of flows and pipe sizes
ASI-NPSH Calculator VS HVAC PUMP Handbook
1000 1500 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 5000
Asi Calculator Head Loss for 100 ft of Pipe (ft of Water)
Handbook Head Loss for 100ft of Pipe (ft of Water)
Flow Rate (GPM)
HVAC PUMP Handbook - Author: James B. Rishel
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