Question 1

What is a pump operating point?

Accepted Answer

The operating point is where the pump curve intersects the system curve. It determines the actual flow rate and head the pump delivers in your specific system.

Question 2

What is NPSH and why does it matter?

Accepted Answer

Net Positive Suction Head (NPSH) ensures liquid doesn't vaporize at pump inlet. NPSHa (available) must exceed NPSHr (required) to prevent cavitation damage.

Question 3

What is Best Efficiency Point (BEP)?

Accepted Answer

BEP is the flow rate where pump efficiency is maximum. Operating near BEP minimizes energy cost and extends pump life. Avoid operating below 70% or above 120% of BEP.

Question 4

How do I calculate pump power?

Accepted Answer

Hydraulic power = ρgQH. Shaft power = Hydraulic power / efficiency. This calculator computes both at the operating point automatically.

Pump Curve

Pump Curve

Pump Parameters

System Parameters

NPSH Parameters

Pump & System Curves

Operating Point