
ANSI CN Series Water Centrifugal Pump
End-suction water pump built to ANSI/ASME B73.1 with a full open impeller and ANSI B16.5 flanges
View specificationsFlowsteer Pumps is a manufacturer of water centrifugal pumps, supplying end-suction and vertical pumps built to the American, international and European dimensional standards.
Flowsteer describes itself as a professional supplier of water centrifugal pumps, specialising in centrifugal pumps for water application. That is a narrow description, and the range reflects it: five horizontal series and one vertical series, all built around water and waste water duties rather than spread across unrelated product lines.
The range spans DN 25 to DN 400, flow to 1100 m3/h and head to 152 m, with drive ratings to 200 kW and working pressures to 1.6 MPa. Nine wetted materials are published across the series, from grey cast iron through bronze and stainless steel to polypropylene, polyethylene and UHMW-PE.
What ties the range together is standards. The CN series is built to ANSI/ASME B73.1, the CI and KCP series to ISO 2858 with the ISO 5199 engineering class, and the FA series to BS EN733 and DIN24255. A plant standardising its pump population can do so without changing supplier when the standard changes.
Six product series covering the water duties that most plants actually have: municipal supply and distribution, waste water and effluent, fire protection, irrigation, HVAC circulation and general industrial transfer.
Five of the six use back pull-out construction, which means the rotating assembly withdraws from the casing with the suction and discharge pipework left bolted in place. On the ANSI CN series that follows from B73.1 itself; on the ISO CI, KCP, FA and VNP series it is stated in the datasheet.
The sixth axis of the range is material. The metal series cover clean, treated and mildly aggressive water; the lined KCP and VNP series cover water whose chemistry would attack metal wetted parts.
Every specification on this site is traceable to the Flowsteer product catalogue. Where a figure is published — the FA series operating envelope, the KCP drive rating, the VNP solids limit — it appears as published.
Where a figure is not published, the specification table says TBC rather than carrying an estimate borrowed from a neighbouring series. The DE series head and materials, and the VNP capacity and head, are the main examples.
The same applies to certifications, production capacity, export markets and company history. The Flowsteer catalogue does not publish them, so this site does not state them. Ask and we will confirm in writing what can be evidenced.
Flowsteer states that its development is guided by four things: attention to the requirements, recommendations and customers' claims; analysis of customer satisfaction; constant checks of the effectiveness of the operational processes; and continuous training of the personnel in cutting-edge technological innovations.
Those are the company's own words, and they are reproduced here rather than rewritten, because they are the published statement of how the business is directed.
Municipal water utilities and treatment works, where the dimensional standard in the specification is usually the deciding factor.
Industrial sites consolidating a mixed pump population onto fewer series.
Building services and fire protection contractors working to EN733 layouts.
Irrigation schemes moving volume at moderate head.
Distributors and EPC contractors supplying any of the above.
These figures come from Flowsteer product datasheets. Company history, production capacity, certifications and export markets are not published, so they do not appear here.



End-suction water pump built to ANSI/ASME B73.1 with a full open impeller and ANSI B16.5 flanges
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ISO 2858 and ISO 5199 back-pull-out end-suction pump, fully interchangeable with other ISO brands
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Horizontal single-stage pump in PP, PE and UHMW-PE for water that attacks metal wetted parts
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Process-duty water pump from DN 25 to DN 400 with flow to 600 m³/h for water and waste water
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BS EN733 / DIN24255 end-suction pump, 2 to 1100 m³/h and head to 152 m, for building services fire and irrigation
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Vertical single-stage sump pump in polypropylene for wet-pit installation with solids to 20 percent
View specificationsThe factory tour page on this site carries photographs of the machining bay, the parts warehouse, the assembly and test area and the packing floor, all taken from the Flowsteer site.
The Flowsteer catalogue does not publish certification documents, so we do not claim any on this site. Tell us what your project requires and we will confirm in writing what can be evidenced.
The founding year is not published in the source catalogue, so we mark it TBC rather than estimate it.
Export markets are not published in the source catalogue. We would rather leave that unstated than print a number we cannot support.
Everything else follows from it: the series, the size, the material and the price.