What is a pump system curve?
A system curve, as shown in Figure 2, is a graphical representation of the pump head that is required to move fluid through a piping system at various flow rates. The system curve helps quantify the resistance in a system due to friction and elevation change over the range of flows.
What is NPSH pump curve?
The NPSH curve displays the minimum required inlet pressure (expressed in m) allowing the pump to pump in accordance with the performance curve and in order to prevent evaporation of the pumped fluid so as to avoid cavitation inside the pump.
How does a sludge pump work?
As the name implies, a sludge pump processes and moves waste fluids with high-solid content. As the name implies, a sludge pump processes and moves waste fluids with high-solid content. Because sludge & slurry pumps have similar operations, people often use the names interchangeably.
What is system curve and pump curve?
A second curve, called the system curve, is used in conjunction with the pump curve and can be overlaid on the same graph. The system curve represents the system head in your specific application at various flow rates and is calculated by determining the system’s static head and friction loss.
Why are pump curves important?
Pump curves are not only used to pick the correct pump for an application but can also be used to estimate flow rates for an already installed system. By knowing the model, discharge pressure, suction pressure, and impeller size, the flow rate can easily be determined from the curve.
What is pump curve and system curve?
What is the use of sludge pump?
Sludge pumps are used for transferring highly viscous solid laden liquid with minimal water content. Roto pumps have a rich history in supplying progressive cavity pumps for deposit transfer applications. Due to this premium sludge transfer capability, these pumps are also known as sludge pumps.
How do you choose pump based on pump curve?
Look at the left side of the curve and you will see a label HEAD – FT and numbers starting with 0 and increasing as you move up the chart. This is the pressure that the pump is capable of producing, measured in feet of head (not PSI!) The bottom of the curve is labeled US GPM. This is the flow that the pump produces.
Why is it not efficient to pump sludge?
Although the energy usage of the sludge transportation systems is critically important, sludge pumping systems are not commonly operating in their best efficiency points. This is because of the inaccurate calculation of pressure drop for sludge pipeline.
What kind of pipe does a sludge pump use?
The pump inlet pipe comprised 10m of 150mm bore pipe fitted into the base of a 4m high filled tank of 8% sludge with a VS of 80%. There was some polymer in the sludge from a cake/sludge reblending operation.
How does the performance curve of a pump work?
Pump Performance Curve. Increasing the impeller diameter or speed increases the head and flow rate capacity – and the pump curve moves upwards. The head capacity can be increased by connecting two or more pumps in series, or the flow rate capacity can be increased by connecting two or more pumps in parallel.
How big of a suction line do you need to pump sludge?
When pumping viscous sludges, special arrangements have to be made at pump suctions to accommodate the Bingham plasticity – chief amongst these is to make the pump suction line from a tank of sludge as short as practically possible for reliable operation. In this case above 1m would have been more appropriate.