Centrifugal Pumps Flashcards
What are the main two construction styles of centrifugal pumps?
Over-hung
Between bearing
What is a disadvantage of overhung type CP?
Thrust loading
What are the three types of impellers in a CP?
Enclosed
Semi-open
open
What is an advantage of between bearing type CP?
No thrust loading
A CP must be _______ in order to start moving fluid.
Primed
What is a very important work practice when disassembling a pump?
Clean work area, use towels
Why can’t CP create vacuum?
Doesn’t have seals
What is the height of fluid that comes out of the CP called?
Discharge Head
What is total head?
Total amount of liquid pump can push out
What is a pumps “capacity” measured in?
GPM
What is “capacity”
How much fluid can be moved in a given time.
What are some limiting factors of a CP pump?
RPM
Size of impeller
Viscosity of fluid
What is the tab in casing that directs water out?
Cut Water
What purpose does “lantern ring” provide?
Moistens packing
Flushes contaminates
Cools Shaft
What is the outer casing of a CP called?
Velute
