Blog posts : "General"

IMPACT OF ACCELERATION HEAD LOSS ON PUMP PERFORMANCE

December 17, 2016

CASE STUDY

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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HOW TO SELECT DIAPHRAGMS FOR AN AODD PUMP?

September 17, 2016

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?

May 8, 2016

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?

September 19, 2012

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)

June 18, 2012

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

May 24, 2012

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

May 11, 2012

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

April 29, 2012

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

April 29, 2012

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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9 Blog Posts