Double Stage Centrifugal Pump

In centrifugal pump, if __________ head is required, two or more impellers can be connected in ____________.

Which one of the following statements is TRUE for the multistage centrifugal pump?

• It is used for low discharge and very high head.

• It is used for high discharge and low head.

• It is used for high discharge and very high head.

• It is used for low discharge and low head.

Identify the part indicated by the arrow.

• Coupling rod

• Shaft Sleeve

• Tie Rod

• Lifting Rod

Identify the parts indicated by the red arrows.

• Shaft Sleeves

• Bearing Sleeves

• Mechanical Seals

• Coupling bushes

How many stages are there for this multistage centrifugal pump?

• 1

• 2

• 3

• 4

Identify the type of seal used in this pump.

• Mechanical Seal

• Packing Seal

• Bearing Seal

• Coupling Seal

Where can these items be found in a multistage centrifugal pump?

• Bearing

• Coupling

• Impeller

• Packing

Identify these bearings commonly used in multistage centrifugal pump.

• Ball Bearing

• Roller Bearing

• Needle Bearing

• Thrust Roller Bearing

The multistage centrifugal pump has additional components such as interstage casing and diffuser/guide vanes for each stage.

• True

• False

Refer to Figure. What is the purpose of this arrangement found in a multistage centrifugal pump?

• To increase the suction volume.

• To reduce the axial thrust.

• To increase the discharge pressure.

• To increase the radial load.