Which of the following types of impellers is used for centrifugal pumps dealing with water containing slurry and sewage?

One-side shrouded impeller
Two-side shrouded impeller
Double section impeller
Open impeller

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : Open impeller

Explanation:

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Closed impellers (Two-sides shrouded):

In the closed or shrouded impellers, the vanes are covered with shrouds (side plates) on both sides
The back shroud is mounted into the shaft and the front shroud is coupled by the vanes
This ensures full capacity operation with high efficiency for a prolonged running period
This type of impeller is meant to pump only clear water, hot water and acids

Semi-open impeller (One-side shrouded):

It has a plate (shroud) only on the backside
The design is adapted to industrial pump problems which require a rugged pump to handle liquids containing fibrous material such as paper pulp, sugar molasses and sewage water etc.

Open impeller:

In open impeller, no shroud or plate is provided on either side i.e. the vanes are open on both sides
Such pumps are used where the pump has a very rough duty to perform i.e. to handle abrasive liquids such as a mixture of water, sand, pebbles and clay, wherein the solid contents may be as high as 25%.

Thus, centrifugal pumps dealing with water containing slurry and sewage have an open impeller.

4 views Answered 2022-09-04 04:29

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