Pumps

Question 1

What is head

Answer 1

Height in meters that the pump could pump upwards

Question 2

What are the main pump specifications

Answer 2

Capacity
Head
Contamination
Gas content
Pulsations

Question 3

What type of pumps are used commonly in approach flow section and why

Answer 3

Double suction pump /fan pump. Due to large maximum capacity and low pulsation

Question 4

What type of pump impellor is used with dirty stock

Answer 4

Open impellor
With a closed one big contaminants may plug flow channels

Question 5

What is a key difference between single and double suction pumps

Answer 5

Single has 90 degree difference between inlet and outlet.
Double the inlet and outlet are on opposite sides so flows through in plane

Question 6

How is pump capacity defined

Answer 6

Pump size
Impellor size
Drive power

Question 7

What is NPSH (pumps)

Answer 7

Net positive suction head.
This is how much pulp or water needs to be on the suction side to avoid cavitiation