pumps Flashcards
1
Q
Centrifugal main parts?
A
Volute, impeller, impeller vanes, inlet
2
Q
Positive and non difference?
A
non can’t pump gases
3
Q
Suction lift?
A
vertical distance between eye of pump and open water
4
Q
CREST
A
create flow, resistance, entry loss, suction lift, temprature
5
Q
Creating flow?
A
movement of static water through suction hose
6
Q
Resistance?
A
resistance from bends and couplings
7
Q
Entry loss?
A
turbulence at eye of the pump into impeller inlet
8
Q
Suction lift?
A
Atmospheric pressure, in theory can lift 10m but practical is 8m
9
Q
Temperature?
A
high temp causes water vapor pressure and can equal atmos pressure at boiling point. Cavitation
10
Q
Pressure loss height?
A
0.1 bar for every 1m in height
11
Q
Pressure loss length
A
0.2 bar per length of hose (25m)
