pump hydraulics - home - pump
TRANSCRIPT
![Page 1: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/1.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Pump Hydraulics Terms and Definitions
![Page 2: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/2.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Common Pump Terms & Definitions
2
• Viscosity • Specific Gravity • Flow Rate • Pressure • Differential Pressure • Working Pressure • Vapor Pressure
![Page 3: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/3.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Viscosity Saybolt Universal Seconds (SSU)
3
SSU = Centipoise cps × 4.55
Specific Gravity
![Page 4: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/4.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Viscosity Inverse Relationship With Temperature
As pumping temperature decreases, the viscosity increases
As pumping temperature increases, the viscosity decreases
4 Viscosity Te
mpe
ratu
re
Viscosity
Tem
pera
ture
![Page 5: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/5.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Specific Gravity • Ratio of the Relative Density of a Material
Compared to Water at 60°F (15 °C) • Specific Gravity of 1.0
5
![Page 6: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/6.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Flow Rate Gallons Per Minute (GPM) • Volume of Fluid, Not Weight • 1 US Gallon is 231 Cubic Inches / 1 m3/h = 0.59 cu ft/min • Rate Expressed as Volume per Unit of Time • Typically Gallons per Minute • Kitchen Faucet • One Gallon Pitcher • Pitcher Fills in One Minute • Flow Rate on Faucet = 1 GPM (0.22 m3/hr.)
6
![Page 7: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/7.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Flow Rate Conversion of Mass Flow to GPM
7
GPM =Lb./Min.
8.33 × Specific Gravity
![Page 8: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/8.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Pressure • Amount of Force Exerted on a Surface
Divided by the Area of the Surface • Pounds Per Square Inch (PSI)
8
![Page 9: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/9.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Conversion of Head to PSI
• Column of Water at 60º F (15 °C) • Open to Atmosphere • Filled with Water to
2.31 Feet (0.7 Meters) High • Water Height will Exert
1 PSI (.06 bar) of Pressure on the Bottom
9
![Page 10: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/10.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Conversion of Head to PSI Convert 1 Foot of Head to PSI
10
PSI =Head in Feet × Specific Gravity
2.31
![Page 11: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/11.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Pressure
• Higher Specific Gravity Means Heavier Liquid • Heavier Liquid Means More Work • Higher Horsepower • Already Factored Into Pressure and PD Pump Curves
11
PSI =Head in Feet × Specific Gravity
2.31
![Page 12: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/12.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Pressure Basics
• Zero Pressure Gauge = 14.7 PSI Absolute (at sea level) / 1.01 bar
• Absolute Pressure = Gauge + 14.7 • Add 14.7 PSI to Gauge Pressure for
Expression as Absolute Pressure, PSIA
12
![Page 13: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/13.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Differential Pressure • The difference between pump discharge
and suction pressure
• The work that the pump must do
13
![Page 14: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/14.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Working Pressure • The maximum system pressure that the
pump may see
• Pump must be designed to withstand working pressure
14
![Page 15: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/15.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Vapor Pressure • The pressure that the vapor of a liquid
exerts at a given temperature • Atmospheric pressure pushes liquid into
the pump suction • Vapor pressure acts to offset atmospheric
pressure
15
![Page 16: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/16.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Vapor Pressure • Vapor pressure of a liquid generally goes up with
temperature • Vapor pressure is a physical property that is specific
to liquids • Solvents and thin hydrocarbons generally have high
vapor pressures • Thick viscous liquids generally do not have high
vapor pressures
16
![Page 17: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/17.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Vapor Pressure Atmospheric Pressure at Sea Level is 14.7 PSIA
Vapor Pressure of Water Boiling at 212º F (100°C) is 14.7 PSIA (1.01 bar)
17
![Page 18: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/18.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Vapor Pressure of Various Liquids
18
![Page 19: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/19.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Learn More About Tuthill Visit Our Websites www.tuthillpump.com www.tuthill.com
Like Us on Facebook www.facebook.com/tuthillcorporation
Follow Us on Twitter @TuthillCorp
![Page 20: Pump Hydraulics - Home - Pump](https://reader030.vdocuments.net/reader030/viewer/2022012103/616a0df211a7b741a34e4e8b/html5/thumbnails/20.jpg)
© 2013 Tuthill Corporation. All rights reserved. Tuthill confidential.
Excellence at work. Excellence in life.