Pump Expert Advice
We've organized some of the leading pump experts to share their advice on pumps and systems. These experts have written articles about their experiences and advice on saving time, reducing costs, and improving pump and system reliability. Have an article you want to include in this section? Send your ideas to editors-at-pumpscout.com.
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Latex emulsions are difficult to blend and transport, requiring high levels of precision in the manufacturing and handling processes. Nearly every pump type has been unable to provide total coverage for every concern associated with transporting latex emulsions except air operated double diaphragm (AODD) pumps.
The liquid-terminal industry transfers millions of gallons of raw materials every day. Article discusses how the use of positive displacement sliding vane pumps can significantly decrease the transfer loss, while improving efficiency and safety.
Outrageous claims are often made about the turndown capabilities of various pumping technologies, and their ability to act as metering pumps. This paper presents data to clarify turndown, its unbreakable bond to accuracy, and the real benefit of turndown to a process.
In designing the TORNADO® T2 rotary lobe pump, NETZSCH engineers challenged the traditional conceptions of rotary pump design in an effort to increase pump reliability, ease of maintenance, performance, and decrease cost. Read about the innovation they discovered.
The appeal of a submersible pump comes in part from the ability to simply drop the pump into either a tank or sump without worrying about the structural integrity. However, despite the ease of installation, the submersible pump is the one of the most misused pumps on the market, largely due to its cost effectiveness in comparison to a vertical unit.
There are lots of pump types available, but which one is right for you? Understanding which pump type you need for your application is critical for reducing costs and increasing the life of your pump and system. We've worked with leading pump experts to put together this comprehensive guide to the most popular pump types.
The days when pump system designers were forced to compromise with standard products that couldn’t be modified to their specific applications are long gone. Now customizing your pump to perform perfectly in a system is the norm. The key to finding the right pump for the job involves first understanding the pumps and then asking the right questions.
Centrifugal pumps can sometimes be noisy, perform poorly, break shafts or show other problems. Many times this is due to a pump suction condition. Read about several causes of these problems.
Though gear pumps may seem simple enough, it actually takes five pump curves to correctly size them for your application. Understanding each of these curves will help you select the right gear pump for the job.
Understanding a few key factors before buying and installing a vertical turbine pump, can prevent a lot of problems and unnecessary maintenance costs. Author provides some advice when shopping for and installing each of the vertical turbine pump's four main components, including: motor, discharge head, bowl assembly, and column & lineshaft.
Broken shafts are a regular occurrence when operating a centrifugal pump, but it doesn't have to be. This article highlights why pump shafts break and what can be done to prevent the damage from happening.
Dr. Lev Nelik recommends some valuable steps you can take to extend the life of your pump and ensure its operating under optimum conditions.
Despite the fact that self-priming, centrifugal pumps offer significant advantages in initial cost, maintenance and operation, few of the pumps are used in industrial plants. This is most likely due to a lack of understanding of the pumps’ operation and design principles.
Contrary to popular opinion, a centrifugal pump is not designed to develop one head at a single capacity as requested by the pump purchaser. In fact a pump is designed and produced to supply a whole range of head-capacity conditions as identified on it's performance curve. The pump will operate on that curve only if it is driven at the particular speed for which the curve is drawn. However, the actual conditions on that curve at which the pump will run, will be determined by the system in which it operates.
Author gives us a practical approach to pump reliability, including advice on how to stop repetitive pump failure.
Is this really cavitation I am dealing with, or is it air entrainment or recirculation? The reason for that question is that all three conditions have almost identical symptoms. Air entrainment and recirculation will also cause the same rumbling/rattling noise and high vibration as cavitation, as well as the recognizable impeller pitting damage. The major difference is that cavitation is an NPSH problem, while the other conditions have nothing to do with the suction pressure or NPSH.
In the many differences that exist between centrifugal and positive displacement pumps, one which has caused some confusion has been the manner in which they each operate within the system. Positive displacement pumps operate with a series of working cycles where each cycle encloses a certain volume of fluid and moves it mechanically through the pump into the system.
Pipe strain is one of these conditions that the unwary may find difficult to relate to equipment reliability. How could seal and bearing failure have anything to do with the pump piping? The reality is that suction and discharge piping that is incorrectly or inaccurately installed and aligned will create stresses on the pump casings that will detrimentally affect the reliable life of the seal and bearings.
So now what do you do? As many of you know, this is a fairly common occurrence, particularly with pumps that have been around a long time. Here's some advice on what to do.
"One Size Fits All" most definitely does not apply in this area of pumping. Even when we define a slurry as a mixture of solid particles in a liquid that is usually water, we are still concealing a multitude of applications behind a simple sounding phrase. The variety of solids that are handled in slurry form covers an extraordinary wide range of products and waste material.
Shopping for a pump can be intimidating. There are hundreds of pump types, multiple pump suppliers and a wide range of prices. Knowing a few key pieces of information before you begin will save you time and money. Pump expert Mike Volk offers some advice on starting the pump buying process.
Understanding the important pump industry terms will save you a lot of time when working through the pump buying process. Here are some of the more common terms that will likely come up during your conversations with pump suppliers.
"Never, in this world of human conflict, have so many been indebted to so few for so much."
These words were delivered by Winston Churchill when he was Prime Minister of Britain, in praise of the Royal Air Force during the early days of the World War II. Today, they could be easily attributed to NPSH and Cavitation. Engineers all over the world are indebted to a very tiny percentage of the operating family of pumps for an over-abundance of analysis, discussion and confusion.