Centrifugal pump head Complete understanding explained in this blog read it carefully for clear this term.
Frequently asked questions
1. If we increase or decrease level of suction tank
then Head will be change?
2. What is Total Head, Suction head, Discharge
head?
3. If you have suction reservoir which level is below
impeller eye then How to calculate Total Head of Pump?
4. If you have pump which produces 30 meter head will it
actually work in 30 meter height?
Head
Head is the height at which pump can deliver water.
1: If we increase or decrease level of suction tank then
Head will be change?
Answer:
Yes
Head will be change.
If we increase suction tank level Head will be increased.
If we decrease suction tank level Head will be decreased.
When suction tank level is higher pump suction pressure will also raise.
This will result in higher Head.
2. What is Total Head, Suction head, Discharge head?
Answer
Total head refers to total water lift
from Suction tank highest level
to water
Total head Ht is
Height of water in discharge line.
Hs = Suction head
Height of water in suction line.
3. If you have suction reservoir which level is below impeller eye then How to calculate Total Head of Pump?
Answer:
Pump will be Produce same Total head.
But reduction in Hd Discharge head.
Because reduction in Hs Suction head.
Pump have to work up lift water which consumes energy.
Rest energy will produce Hd Discharge head
In above example pump will produce Zero flow with discharge pressure.
This is called Shut off Head.
When discharge flow is increasing Pressure is reducing.
Detailed study on Flow vs Discharge pressure is available in
- Advanced Concepts Chapter.
It is not advisable to run pump at zero flow for long time. Pump will be heated and no heat release due to zero flow.
4. If you have pump which produces 30 meter head will it actually work in 30 meter height?
Answer:
No.
It will not working
We have to consider Static Head loss & Friction Head Loss,
After that We have sufficient flow at Discharge head.
Check Calculations too