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Most Industrial processes involve heat transfer from one process stream to another process stream (interchanging) or from a utility stream to a process stream. In the present energy crisis scenario, target in any industrial process is MER – Maximum Energy Recovery or Minimum Energy Requirements.


In the early days of pinch technology, the main emphasis was on heat exchanger network (HEN) design. Today pinch technology stretches far wider in the fields of overall process improvement and utility system design

Pinch Technology analyses process utilities (particularly energy and water) to find optimum way to use them, resulting in financial savings. It does this by making an inventory of all producers and consumers of these utilities and then systematically designing an optimal scheme of utility exchange between them. Energy and water re-use are at the heart of pinch technology.

With the application of pinch technology, both capital investment and operating cost can be reduced. Emissions can be minimized and throughput maximized.

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You are handling lot many centrifugal pumps & is always struggling for design data which may or may not be available specially in case of vintage units its very difficult to recollect them.

Even in newer plants if you do not have all procedures in place for documents handling you might face the same problem. What to do in such a case? Boss is not ready to listen any excuse.....You know that there is something wrong which can be improved and therefore you get a good recognition.......But

Here is the answer...

In the last article I discussed brief & important things about Globe Valve. Today I will discuss some basics of Ball Valve.



The Ball valves as name suggests is having a ball type spherical body. They are stop valves that use a ball to stop or start the flow of fluid. The ball performs the same function as the disk in the globe valve.

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Vacuum is any system of reduced
pressure, relative to local (typically atmospheric) pressure. Achieved with a pump, vacuum systems are commonly used to

• Remove excess air and its constituents.
• Remove excess reactants or unwanted byproducts.
• Reduce the boiling point.
• Dry solute material.
• Create a pressure differential for initiating transport of material

Liquid-ring and dry pumps offer the most advantages for the chemical process industries (CPI). Both of these pump types have bearings sealed off from the pumping chamber and do not require any internal lubrication because the rotors do not contact the housing. Both, when employing a coolant system, prevent the coolant from contacting the process fluid and causing contamination, and both use mechanical shaft
seals for containment

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Just Time Pass....
Some fun facts from another blog called tellmewhyfacts

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1. Venus is the only planet that rotates clockwise.


2. Elephants are the only animals that cannot jump.


3. Google receives about 200 million search queries each day.


4. The first owner of the Marlboro company died of lung cancer.

Distillation operations have been branded as high energy users. An estimate says 3-5% of the total energy used in the United States was for distillation.

Therefore it is necessary for process engineers to have a ready check list for energy saving in distillation columns. In this post we are suggesting a list for process side. This does not include general recommendations for utilities.

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You may feel frustrated when somebody suddenly ask you about LMTD for the given heat exchange condition. That time you feel screamed if you do not have calculator with you. Also, when you just begin using your calculator somebody answered the LMTD value and you feel surprised & wonder how he did it so quickly? Now you can also do it.

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The pump performance or characteristic curve is often referred to as a water performance curve (see Figure 1). Water is naturally the fluid of choice for testing pumps because of its availability. The question is: can the water performance curve be used for other fluids? The answer is YES with care.

The pump manufacturers will sometimes identify the unit of the total head axis as feet of water, or sometimes there will be a notice somewhere on the chart saying: tested with water at 70ºF. This is the manufacturer’s way of telling the user that the pump was tested with water and that the power curves are ONLY valid for water, but careful there are other pitfalls.

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