Wear Rings Flashcards
1
Q
How many wear rings
A
4
2
Q
Where are wear rings located
A
Rotating/Impeller: on top and bottom of each runner
Stationary/Casing: on hrad cover and in pump case
3
Q
Purpose of wear rings
A
Provide an economically replaceable, renewable surface for maintaining tight clearances between impeller and casing
4
Q
Why are tight clearances provided by the wear rings necessary
A
Tight clearances on low pressure(suction) side and high pressure (discharge) side of the impeller maintains a seal
5
Q
What are the three types of wear rings?
A
Flat
L shaped
Labyrinth
6
Q
What are flat rings used for
A
Axial or radial
7
Q
What are L shaped rings for
A
Axial AND Radial
8
Q
What are labyrinth rings for
A
Dissipate pressure
