Question

Identify how the variations in the following parameters can influence the functioning centrifugal pumps:

1. Suction pressure is less than required

2. Decrease in suction flow

3. Use of high-density fluids

1.

1. Results in Cavitation

2. Performance is diminished

3. Discharge flow decreases

2.

1. Results in Cavitation

2. Discharge flow decreases.

3. Performance is diminished

3.

1. Performance is diminished  

2. Discharge flow decreases

3. Results in Cavitation

4.

1. Discharge flow decreases.

2. Results in Cavitation

3. Performance is diminished

Answer 1

Correct Answer - Option 2 :

1. Results in Cavitation

2. Discharge flow decreases.

3. Performance is diminished

Explanatin:

Suction pressure

Suction pressure is the pressure at the pump's suction nozzle as measured on a gauge. The suction pressure is probably the most important pressure inside the pump. All the pump's production is based on the suction pressure. The pump takes suction pressure and converts it into discharge pressure. If the suction pressure is inadequate, it leads to cavitation. Because of this, all pumps need a gauge at the suction nozzle to measure the pressure entering the pump.