Rotech Pumps & Systems Inc. is one of the leading suppliers of pumps and related equipment and parts. Since a decade, Rotech Pumps has been providing best quality products at competitive pricing and minimum lead time to Industrial, commercial and municipal sectors. One of the primary products of Rotech Pumps is ANSI Chemical process pumps. They are designed to handle corrosive fluid and used for heavy duty applications.
Chemicals are primary component of numerous industries and to handle and transfer large quantity of chemicals in efficient manner, a chemical process pump has become an inevitable tool for these industries. API and ANSI pumps are two of the most commonly used horizontal end suction chemical process pumps.
An ANSI pump is designed and manufactured as per the standards of the American National Standards Institute. It is the preferred choice not only for chemical process applications but also for water and other less aggressive applications. This is because ANSI centrifugal pumps provide flexibility of interchangeability of pumps from one manufacturer to another.
API pumps are built to meet the requirements of the American Petroleum Institute Standard and almost exclusively employed in oil refinery industry to handle higher temperatures and pressure application. However, both these single staged pumps are designed with a radially split casing to accommodate a back pullout arrangement for easy maintenance.
Major differences between API and ANSI Pumps:
- Volute Case: ANSI pumps and smaller sized API pumps possess a single volute design of passage. Due to this design of volute an imbalance of the thrust loads around the impeller. However, larger API pumps employ double volute design to reduce these loads.
- Back cover arrangement: The back cover and gasket in ANSI centrifugal pumps are supported against the pump casing by the bearing frame adaptor. Due to this arrangement when the pressure applied increases than the normal, the casing may get fractured. But on the other hand, in API pumps, the back cover is directly bolted to the casing and the adaptor doesn’t play a part in the pressure boundary.
- Mounting Feet: ANSI pump casing are mounted on feet projecting from the underside of the casing. Because of this design, when ANSI pumps are used in high-temperature applications their casing expands upward and causes thermal stress which will in turn have detrimental effect on the reliability of the pump. In contrast, API pumps are mounted at the horizontal centerline of the casing on feet projecting from each side of the casing. This ensures that API pumps can function at higher temperatures and thus gives them slight advantage over ANSI Pumps.
rotechpumps.com is leading ANSI centrifugal pumps manufacturers based in Canada and offers largest range of products that includes chemical process pump. Please visit us for more details.
Centrifugal pumps will fail despite of all the care in operation and maintenance. That is to say, these pumps can no long be kept in services. Reasons that cause the failure of these products are various. One of the most common conditions is that they are not able to deliver the desired flow and head. There are still many other conditions under which the centrifugal pumps are considered to have failed. For example, there are many problems which are related with seals such as the leakages, loss of flushing, cooling, quenching systems, etc. For another example, there are many other problems that are related with pump and motor bearings such as the loss of lubrication, cooling, contamination of oil, abnormal noise and so on.
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