Country, region and language selection

International websites


Americas / Oceania

Africa and Middle East

Asia / Pacific

Performance coefficient

The performance coefficient (λ) is a characteristic coefficient identifying the pump input power.
The following equations are yielded in conjunction with the pump power output (PQ) and pump input power (P):

ρ    Density of fluid handled
η    Pump efficiency
U2   Circumferential velocity at the impeller outlet
D2   Impeller diameter at the outlet
b2   Impeller outlet width
φ    Flow coefficient
ψ    Head coefficient



Become part of our team!

Become part of our team!

As an international employer, KSB offers exciting challenges in many different areas.

Regardless whether you are an experienced professional or a pupil, student or graduate ─ learn more about our work culture and find job openings from all over the world in our job portal.