This document provides instructions for using an NPSH (Net Positive Suction Head) calculator. It includes pump operating parameters like fluid temperature and flow rate. It also includes sections on system inlet height configuration, vapor pressure reference table, piping configuration, and calculation of head loss and NPSH available versus required. The summary is designed to highlight the key aspects and purpose of the document in 3 sentences or less.
Copyright:
Attribution Non-Commercial (BY-NC)
Available Formats
Download as XLS, PDF, TXT or read online from Scribd
This document provides instructions for using an NPSH (Net Positive Suction Head) calculator. It includes pump operating parameters like fluid temperature and flow rate. It also includes sections on system inlet height configuration, vapor pressure reference table, piping configuration, and calculation of head loss and NPSH available versus required. The summary is designed to highlight the key aspects and purpose of the document in 3 sentences or less.
This document provides instructions for using an NPSH (Net Positive Suction Head) calculator. It includes pump operating parameters like fluid temperature and flow rate. It also includes sections on system inlet height configuration, vapor pressure reference table, piping configuration, and calculation of head loss and NPSH available versus required. The summary is designed to highlight the key aspects and purpose of the document in 3 sentences or less.
Copyright:
Attribution Non-Commercial (BY-NC)
Available Formats
Download as XLS, PDF, TXT or read online from Scribd
This document provides instructions for using an NPSH (Net Positive Suction Head) calculator. It includes pump operating parameters like fluid temperature and flow rate. It also includes sections on system inlet height configuration, vapor pressure reference table, piping configuration, and calculation of head loss and NPSH available versus required. The summary is designed to highlight the key aspects and purpose of the document in 3 sentences or less.
Copyright:
Attribution Non-Commercial (BY-NC)
Available Formats
Download as XLS, PDF, TXT or read online from Scribd
HEAD Head Fittings Pipe NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0 NA NA 0.012915 0 0 0.011802 0 0 0.012284 0 0 0.011514 0 0 0.012185 0 0 0.011514 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
80367315.xls
Date: Job Name: Drawings / Page: Max GPM:
1/5/2012 23:17
NPSH Calculation Address:
Constants / Assumptions: Mean Operating Fluid Temperature: 45 F Total Flow Through Pump: Vapor Pressure of Liquid: 0 gpm 0.75 ft. water Atmospheric Pressure: Surface Pressure: 14.70 PSIA 0 PSIG 33.96 ft. Water (if exposed to air surface pressure = 0)
Pumped Fluid: WATER
Piping Configuration: Pipe Sub System#: Pipe Diam. (Nom): Pipe Length: Flow Rate: Pipe Pressure Drop: Valves (Fully Open) / Fittings 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 2 Eq. Length 20 16 340 150 8 29.9 55 20 60 0 3 Eq. Length 20 16 340 150 8 29.9 55 20 60 0 4 Eq. Length 20 16 340 150 8 29.9 55 20 60 0 5 Eq. Length 20 16 340 150 8 29.9 55 20 60 0 6 Eq. Length 20 16 340 150 8 29.9 55 20 60 0 1 1 inch 0 feet 0 gpm 0.0 ft. Water 0.0 psi 1 inch 0 feet 0 gpm 0.0 ft. Water 0.0 psi 0.0 0.0 2 1 inch 0 feet 0 gpm ft. Water psi 0.0 0.0 3 1 inch 0 feet 0 gpm ft. Water psi 0.0 0.0 4 1 inch 0 feet 0 gpm ft. Water psi 0.0 0.0 5 1 inch 0 feet 0 gpm ft. Water psi Total 0.0 0.0 6
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: Fitting Pressure Drop:
Qt. 0 0 0 0 0 0 0 0 0 0
Qt. 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0 0 0 0
Qt. 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0 0 0 0
Qt. 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0 0 0 0
Qt. 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0 0 0 0
Qt. 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0 0 0 0
Total 0 0.0 0.0
0.0 ft. water 0.0 psi
0.0 ft. water 0.0 psi Description input here input here input here input here input here Total:
0.0 0.0
ft. water psi
0.0 0.0
ft. water psi
0.0 0.0
ft. water psi
0.0 0.0
ft. water psi
Additonal Pressure Drops:
0.0 0.0 0.0 0.0 0.0 0.0
ft. water ft. water ft. water ft. water ft. water ft. water
Total Head Loss (Pipe + Fittings + Additional Drops) :
0.0
Results (Static Head) (Vapor Pressure) 0.8 (Loss in Fittings) 0.0 (Loss in Pipe Length) NPSHA
NPSHA Net Positive Suction Head Available
= 34.0 + (Atmospheric Pressure)
0.0
0.0 (Surface Pressure)
0.0
0.0 (Additonal Loss)
33.21
ft. Water
Pump Schedule #: MFR: Model #:
NPSHR Net Positive Suction Head Required (From Pump Curve)
Note: Trying tofigure out how my fluids results compare to the table values found in the handbook and the pump wheel looks like there is a safety factor associated with the table values when compared to the theoretical values. More testing ne Pressure Drop in 100 ft. of Pipe 3 My Value Flow Wheel DI GPM 2.5 1.85 2.4 3 100 2 1.5 1.95 3 90 1.5 0.92 1.2 3 70 1 0.68 0.9 3 60 2.7 2.7 5 400 0.5 1.6 1.6 5 300 0 2.4 2.3 6 700 0 0.5 1 1 My Value 1.2 1.3 8 900 1.5 1.6 8 1000
y = 1.3008x
ASI-NPSH Calculator VS HVAC PUMP Handbook HVAC PUMP Handbook - Author: James B. Rishel
