What is characteristic curve of centrifugal pump?

The characteristic curves of centrifugal pumps plot the course of the following parameters against flow rate (Q): head (H) (see H/Q curve), power input (P), pump efficiency (η) and NPSHr, i.e. the NPSH required by the pump.

What is pump Characteristics curve?

The pump characteristic curves can be defined as ‘the graphical representation of a particular pump’s behavior and performance under different operating conditions’. The operating properties of a pump are established by the geometry and dimensions of the pump’s impeller and casing.

What is the importance of characteristic curve?

I-V characteristic curves are generally used as a tool to determine and understand the basic parameters of a component or device and which can also be used to mathematically model its behaviour within an electronic circuit.

How do you plot system Characteristics curve?

How to Plot a System Curve

  1. Step 1 – Set the System Syzer Scale 5 for 2200 GPM at 100 feet of head.
  2. Step 2 – Without changing the position (or settings) of the System Syzer, read off and record the head at various other flows.
  3. Step 3 – Plot these values to develop the system curve.

What is centrifugal pump PDF?

• Centrifugal Pump can be defined as a mechanical device used. to transfer liquid of various types. • As the name suggests, it relies on the principal of Centrifugal. force. • It converts the energy provided by a prime mover, such as an.

How do you plot system characteristics curve?

What are the three parts of a characteristic curve?

What are the three parts of a characteristic curve? Shoulder, Straight-line portion, and Toe.

What is H and D curve?

Definition. A graph in which the density of the photographic film (vertical axis) is plotted against the logarithm of the relative exposure (horizontal axis), to illustrate the photographic characteristics of an emulsion (e.g. on an x-ray film).

What is the difference between system curve and pump performance characteristics curve?

Difference in pump curve and system curve at operating flow rate is equal to head loss across control valve. As you can see when neglecting the pressure loss across the control valve for the system curve generation, the pump and system curves will NOT intersect at the operating flow rate.

What is system characteristic curve?

The system characteristic curve (see Characteristic curve) represents the relationship between the system head (Hsys) and the flow rate (Q). It is often parabola-shaped and does not generally pass through the origin of the H/Q coordinate system. The curve becomes progressively steeper as throttling increases.