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Nov 23, 2014 · This segment covers basic pump panel overview including gauges and valve operations, as well as other components commonly found on pump panels.
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Do piping and pumps work together?
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How does a flooded suction pump work?
- General System
- System Curve
- Draw The System Curve
- Static Head
- Comments & Caution Notes
- Drawing The Line For Static Head
- Pressure Head
- Side Note
In the field, I often encounter systems that were designed correctly, but over time, revisions were made to the initial design without consideration for reliability or long-term operating/maintenance costs. Unfortunately, I have also experienced system designs that were doomed to fail from the start. When solving a pump system issue, I will often r...
The system curve is composed of three basic factors: the static head (elevation head), the pressure head and the friction head (pressure drop). Simply stated, a system curve defines the relationship between total head loss and flow rate. A system head curve is a cartesian (graphical quadrant 1) representation of the head required by the system over...
You can create the system curve on a sheet of graph paper and then add the pump curve. Alternatively, I like to just draw the system curve (superimpose) on a printed copy of the pump curve. The latter method can be a little messy, but the head and flow axes with assigned values are already established. Reflection: Many of you may question my old sc...
Static head is sometimes referred to as elevation head and is independent of the flow rate. This first factor in the system curve calculation is relatively easy to cipher and requires only a physical measurement. Briefly described, static head is the difference in the vertical height (change of elevation) from the liquid surface level of the suctio...
By definition, a “flooded suction” simply means that the liquid level on the suction side is above the pump impeller centerline. It does not imply there is adequate net positive suction head available (NPSHa) and/or submergence as many people believe. Note: On the suction side of the pump, the amount of vertical distance (height) of the liquid abov...
Assume for our example that the total static head is 20 feet; you would then draw a horizontal line with starting point on the vertical Y-axis at value 20 feet across the full graph. This line is not the system curve per se; it is simply a reference point.
The second factor in the system curve calculation is the pressure head. For a true open system (free and unrestricted discharge), there is no pressure head, so we can ignore the factor and no action is required. However, in a hybrid open system, if there is pressure head, then the pressure would be converted to head and added to the static head. To...
In simple terms, velocity head is the energy required to accelerate the fluid from zero or low velocity (at the pump suction) to a higher velocity downstream in the system. Velocity head is the kinetic factor in Bernoulli’s equation (conservation of energy principle appropriate for flowing fluids) that is one factor of three in the total head. Velo...
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- Videos and notes for a structured introductory thermodynamics course are available at:https://engineering.purdue.edu/~wassgren/teaching/ME20000/index.html...
Check it out as Bossman and Luke end up with the wrong pumps!Bossman Presented by @ConequippartsLearn more about how to prank someone at your jobsite! You ca...
From food processing to oil wells, pumps play a critical role in the production and maintaining our standard of living. Pipes carry the fluid, but pumps supply the energy to move it. Because the piping and pumps work together, they must be thought of and designed as an integrated system. Change one part, and the system can become less efficient.
