How do you read a pump performance curve?
A PD pump curve indicates pump capacity, on the horizontal lines, in units per minute. In this example, the curve indicates gallons per minute (GPM) and liters per minute (LPM) in the left margin and the vertical lines indicates pump speed in revolutions per minute (RPM).
What are the different types of pump curves?
Centrifugal Pump Curves – 4 Types of Performance Curves
- Head Vs. Flow Curve (H-Q Curve)
- Efficiency Curve.
- Power / Energy Curve.
- NPSHR curve.
- Pump Family Curve.
What does a pump curve tell you about a pump?
A pump performance curve indicates how a pump will perform in regards to pressure head and flow. A curve is defined for a specific operating speed (rpm) and a specific inlet/outlet diameter. The curve also shows the shut off head or the head that the pump would generate if operating against a closed valve.
What happens when a pump runs off its curve?
If a pump is running out on the end of the curve it can cause cavitation inside the pump and result in premature wear of the impeller and bearings of the motor. It can also cause the motor to over amp and prematurely fail.
What is head in pump curve?
One of the most misunderstood physical characteristics of a pump is the concept of head. Simply stated: a pump’s head is the maximum height that the pump can achieve pumping against gravity. Intuitively, if a pump can produce more pressure, it can pump water higher and produce a higher head.
What is the difference between pump curve and system curve?
In general, a pump is used to overcome frictional head loss in piping systems as well as system elevation changes between system boundaries (i.e., static head). The system curve helps quantify the resistance in a system due to friction and elevation change over the range of flows.
How do you find the pump curve?
Review pump performance curves in an instant
- Step 1: Search for your product. To find the pump performance curve you need, simply type the pump name into the “Product” search field and select the product and model you want.
- Step 2: Review the information.
- Step 3: Print pump curve and additional data.