What is Flow Number?
Flow number, Nq, is a dimensionless parameter representing the pumping capacity of an impeller.
View Hydrofoil ImpellerFlow Number Explained
Flow number, Nq, is a dimensionless parameter representing the pumping capacity of an impeller. In industrial mixing, this parameter should be reviewed along with tank geometry, impeller type, fluid properties and operating objective.
Common Applications
- Pumping capacity
- Circulation rate
- Impeller comparison
- Scale-up
Important For
- Higher Nq generally means better circulation
Selection Factors
Correct selection depends on the process objective and site conditions. For Flow Number, Premix usually reviews these points before recommending equipment:
- Q = flow rate
- N = revolutions per second
- D = impeller diameter
Why It Matters In Plant Operation
Flow Number affects process stability, chemical usage, equipment life and final output quality. A correctly selected solution helps reduce trial-and-error at site and supports more predictable daily operation.
Frequently Asked Questions
What is Flow Number?
Flow number, Nq, is a dimensionless parameter representing the pumping capacity of an impeller.
Where is Flow Number commonly used?
It is commonly used in Pumping capacity, Circulation rate, Impeller comparison, Scale-up.
How does Premix select Flow Number?
Premix reviews Q = flow rate, N = revolutions per second, D = impeller diameter along with the plant layout and maintenance requirement.