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Technical support, case histories, installation and maintenance of GemmeCotti pumps.

Mag drive vs Mechanical seal pumps: which are the advantages and disadvantages?

In applications where chemicals, acids and corrosive liquids are involved it’s necessary to pay a great attention to the kind of pumps used and sometimes it’s difficult to choose between seal or sealless pumps. So which are the advantages and disadvantages...
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There’s a suitable material for each application

In my latest article about the different materials used for chemical pumps I wrote a brief guide helpful for a first materials selection according to their properties and characteristics. Now I would like to analyze each material from the point of...
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A brief guide to choose the suitable pump materials for chemical applications

When dealing with acids it’s important to use suitable chemical pump materials resistant to corrosion which are highly efficient and require minimum maintenance. That’s why, after years of experience in chemical pumps field, we decided to use Polypropylene, PVDF and...
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Five things you should know about Atex Pumps

When operating in a potentially explosive atmosphere it’s necessary to use a suitable pump designed and manufactured according to the ATEX directive 94/9/CE. Here are five main things you should know when dealing with Atex Pumps:   Equipment used in potentially explosive...
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Why is NPSH important for pump selection?

One of the important aspects to keep in mind when installing a pump in a plant is NPSH (net positive suction head).  There are two values of NPSH: NPSH available calculated by the plant engineer, and NPSH required which depends...
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How to easily select a pump for acid

How to Select a Pump for Acid? First of all you should find out some important technical data which are extremely useful for the right choice of pump : capacity/flow and head/differential pressure required, kind of liquid, temperature, viscosity, possible presence of solids in suspension and if possible also NPSHa.
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