Impeller is used in –

✅ Explanation: An impeller is a rotating component in a centrifugal pump that increases the pressure and flow of a fluid. It's the key element responsible for the pump's operation.🛑 Additional Information

• 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%.