Pumps Flashcards
Mechanical device that transfers liquid against gravity or exhaust gasses?
Pump
Amount of liquid a pump can move in a given time?
Capacity
2 ways to measure pump pressure:
1) PSI
2) Head
Height of a column of fluid?
Head
3 things affect capacity:
1) Size of pumping element
2) RPM
3) Viscosity
Pumps capacity is rated in?
GPM
Pressure at the discharge end of the pump?
Discharge head
Fluid is fed to pump at or above intake?
Positive head
When a vacuum is required to lift fluid into a pump?
Negative head
2 methods of sealing a rotating shaft:
1) Compression packing
2) Mechanical seal
Centrifugal pumps have to be primed because they do not have a _____ _____?
Positive seal
2 types of centrifugal pumps:
1) Split case
2) End suction
3 types of impellers:
1) Open
2) Semi closed
3) Closed
Impeller between bearings is called ____ ____?
Between bearing
Between bearing impellers are common in ______ _____ pumps?
Split case
End suction pumps have what’s called an ______ configuration.
Overhung
Major disadvantage to single stage impellers?
Limits pressure
3 ways to mount pumps:
1) Frame mount
2) C-frame
3) Close coupled
What mounting method aligns the motor to pump?
Frame mount
What mounting method describes a pump being attached directly to the motor shaft?
Close coupled
4 components to packing a pump:
1) Stuffing box
2) Lantern ring
3) Packing
4) Gland follower
3 characteristics of flush water:
1) Cools shaft
2) Keeps packing swole
3) Flush away contaminants
_____ _____ can come from an external source or from the pump itself?
Flush water
