Blog posts : "General"

Markets served by Viking Gear Pumps

Internal gear pumps are very versatile in terms of the application they can cover. From very thin liquids (less than 1 cps) to very thick liquids (more than 100,000 cps), clean liquids to abrasive liq…

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Pumping Polyols for Polyurethan (PU) Foam Industry

We will be discussing about the selection of gear pump for Polyol with fillers added in it. Before going to the selection, let us first understand about the Types and Uses of POLYOLS and FILLERS.


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What if diaphragm fails in an AODD pump?

AODD pumps have been gaining popularity since last couple of decades & now find their presence in every industrial segment because of their ability to pump wide range of fluids. Let it be corrosive, a…

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What is Pump?

A pump is mechanical device which is used to transfer fluid from one point to another point, usually from lower elevation to higher elevation. The pump performs this action with the help of a prime mo…

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Regeneration of Transformer Oil

Transformer is one of the main assets in the electrical power industry which needs to be maintained for guaranteed uninterrupted power transmission. Transformer oils are important for the functional t…

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Centrifugal vs PD Pump

According to the Hydraulic Institute (HI) pumps are classified in two families i.e, positive displacement and centrifugal (roto-dynamic), both having their best areas of application and uses. However,…

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Pumping Isocyanates for Polyurethane (PU) Foam Industry

Before starting with the selection of the pump, let us first understand about the uses, types and properties of Isocyanates.

Isocyanates are a family of highly reactive, low molecular weight chemic…

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How to Select AODD Pump? Parameters to consider

Factors to be considered while selecting the AODD pump are as follows:

1.Fluid – The most important factor to be considered is the Type, Composition and Nature of the fluid in order to avoid th…

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For a petrochemical plant, customer ordered an Air Operated Double Diaphragm pump to lift water from an underground pit for intermittent application. The pit was 5 meter deep and custome…

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Diaphragms separate air and liquid chambers of an AODD (Air Operated Double Diaphragm) Pump. Failure of diaphragm will not only stop the pump operation but also result in leakage of the process fl…

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Why mechanical seals fail in the pump?

Indisputably, mechanical seal failure is the most common cause of pump downtime. Operators and engineers in plants of all sizes and industries will vouch for it. In this blog, we will talk about most …

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Do PD Rotary Pumps Require Pressure Relief Valve?

One day Mr. Pandey, operator at a chemical plant, was overseeing the raw material unloading from the truck to the storage tank. The pump for unloading this thick raw material was a positive displaceme…

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Online Tools (Unit Conversion, NPSHa calculations, Chemical Compatibility)

Though the world has become interconnected and there is standardization of most technological products, yet companies cling to the units they follow traditionally for various liquid/ system parameters…

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Mechanical Seal Problems? Consider Sealless Magnetic Drive PD Rotary Pumps

In a Dec 2008 survey of industrial pump users, top three of 12 identified needs were “eliminating leakage”, “simple installation, operation, and maintenance”, and “minimizing energy uses.” Any pump us…

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New Pump Is Not Developing Pressure

Few years ago, Mr. Pandey, operations manager at a chemical plant, called me, “This new gear pump I bought from you a week back is no good.”

I probed, “Pandeyji, why do you think this pump is n…

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Can PD Pumps Handle Thin Liquids

The question begs asking, “Everyone knows centrifugal pumps are best suited for handling thin liquids. Why even bother whether PD pumps will work for such applications?”

Before we address this,…

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Why This Blog

In our engagement with industry for the past several years, as one of the world’s largest manufacturers of PD pumps, we found that people value the wealth of knowledge we have. Every time we shared th…

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17 blog posts