CN Series
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
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Flowing the World
Water Centrifugal Pumps Built to the Standard Already in Your Plant
ANSI/ASME B73.1, ISO 2858, ISO 5199 and BS EN733 pumps from one manufacturer, so standardising your pump population does not mean changing supplier.
Our Range
What We Make
Water centrifugal pumps, in five horizontal series and one vertical series, covering clean water through to dosed effluent and grit-bearing sump drainage.
- End-suction pumps to three dimensional standardsANSI/ASME B73.1 on the CN series, ISO 2858 with ISO 5199 on the CI and KCP, BS EN733 / DIN24255 on the FA.
- Metal and polymer wetted partsCast iron, ductile iron, carbon steel, bronze, SS304 and SS316 on the metal series; PP, PE and UHMW-PE on the lined series.
- Vertical wet-pit pumpsThe VNP series for sumps and wet wells, with solids tolerance to approximately 20 percent and bearings above the liquid line.
- Complete sets or bare shaftPumps supplied bare shaft for a rebuild, or as complete sets with motor, coupling, guard and baseplate.
Cutaway demonstration pump showing shaft, bearing housing, mechanical seal and closed impeller
Products
Six Pump Series for Water and Waste Water
Every series below is built to a published dimensional standard. Specifications are quoted as the catalogue publishes them, and anything unpublished is marked TBC.
CI Series
ISO CI Series Water Centrifugal Pump
ISO 2858 and ISO 5199 back-pull-out end-suction pump, fully interchangeable with other ISO brands
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KCP Series
KCP Series Lined Water Centrifugal Pump
Horizontal single-stage pump in PP, PE and UHMW-PE for water that attacks metal wetted parts
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DE Series
DE Series Water Centrifugal Pump
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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FA Series
FA Series EN733 Horizontal Centrifugal Pump
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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VNP Series
VNP Vertical Sump Pump
Vertical single-stage sump pump in polypropylene for wet-pit installation with solids to 20 percent
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Pump Categories
1 product
ANSI Water Centrifugal Pumps
End-suction water pumps built to the American dimensional standard, so the pump you buy interchanges with the pump already bolted to the baseplate.
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ISO Water Centrifugal Pumps
Metric end-suction pumps built to ISO 2858 dimensions and the ISO 5199 engineering class, in metal and in polymer.
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1 product
DIN24255 Water Centrifugal Pumps
End-suction pumps on the European dimensional standard, for building services, fire protection, irrigation and municipal water.
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Vertical Water Pumps
Vertical pumps for sumps, pits and wet wells, where a horizontal pump has no flooded suction to work from.
Explore the range1 product
Water Centrifugal Pumps
General-purpose water and waste water pumps across the widest size band in the range, from DN 25 through to DN 400.
Explore the rangeWho We Serve
Six Water Duties the Range Was Built Around
Every application listed here appears in the Flowsteer product catalogue. We have not added markets the pumps were not specified for.
Industry
Municipal Water Supply
Transfer, distribution and booster duties on city water networks, with EN733 and ANSI footprints and a bronze impeller as standard.
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Industry
Waste Water Treatment
Open impellers, polymer wetted parts and vertical sump pumps for screened sewage, return sludge, effluent and pit drainage.
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Fire Protection
EN733 end-suction pumps for ring mains, hydrant supply and sprinkler duties, with a 1.6 MPa working pressure option.
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Industry
Irrigation and Agriculture
High-volume end-suction pumps for field and scheme irrigation, sized from a published curve at 50 Hz or 60 Hz.
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Industry
HVAC and Cooling
Chilled water, condenser water and heating circulation duties from -10 °C to 105 °C on one EN733 series.
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Industry
Industrial Water Transfer
Plant water, process circulation, booster and liquid transfer duties across the full Flowsteer size band.
Read moreThe Real Question
What Problem We Solve
Three problems account for most of the pump enquiries that reach us, and all three are decided long before the pump runs.
The pump that no longer exists
A serviceable baseplate with an obsolete pump on it. Building to a dimensional standard means the replacement lands on the same holes and the same pipe centreline, with no new civil work.
The pump the water destroyed
A duty point met perfectly and a casing that corroded through in a season. Nine published wetted materials exist so the material can be selected from the water analysis instead of from habit.
The seal change that took two days
Most of a conventional seal change is pipework. Back pull-out construction leaves the casing bolted between the flanges and takes the rotating assembly out of the back.
The Numbers
What the Range Actually Covers
Every figure below is taken from a published Flowsteer product datasheet. Where the catalogue publishes nothing, we publish nothing.
5pump seriesANSI CN, ISO CI, KCP, DE and FA horizontal pumps plus the VNP vertical sump pump
DN 25 - DN 400size bandThe DE series alone spans DN 25 to DN 400; the ANSI CN runs 1 in to 10 in
1100 m3/hmaximum published flowFA series, 2 to 1100 m3/h across DN32 to DN250
152 mmaximum published headFA series, 2 to 152 m
200 kWmaximum published drive ratingKCP series
1.6 MPamaximum working pressureFA series, 1.2 MPa standard and 1.6 MPa on request
105 Cmaximum published temperatureFA series, -10 C to 105 C
20 %maximum published solids contentVNP vertical sump pump
4dimensional standards built toANSI/ASME B73.1, ISO 2858 with ISO 5199, BS EN733 / DIN24255
9wetted materials publishedCast iron, ductile iron, carbon steel, bronze, SS304, SS316, PP, PE, UHMW-PE
Why Flowsteer
Why Buy From Flowsteer
Four things we do differently, each of which you can check against the product pages before you speak to anyone.
- Published envelopes, not curves on requestThe FA series publishes flow, head, speed at both supply frequencies, temperature and working pressure. You can select before you enquire.
- Unconfirmed values marked TBCWhere the catalogue does not publish a figure, our product pages say so. We would rather mark a specification unconfirmed than print a number we cannot stand behind.
- Four standards from one supplierANSI, ISO 2858 with ISO 5199, and EN733 / DIN24255. Standardising a mixed plant does not force a change of supplier.
- Materials specified against the waterCasing, impeller, shaft and seal are chosen separately, because they do not see the same conditions.
Rows of assembled centrifugal pump sets staged on pallets next to export crates
Solutions
Four Engineering Decisions That Decide Pump Life
Maintenance access, material selection, dimensional standards and sealing. Most pump failures trace back to one of the four.
Solution
Back Pull-Out Maintenance
Four of the five Flowsteer series use back pull-out construction. Here is what that changes about a maintenance window.
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Solution
Pump Material Selection
Cast iron through to UHMW-PE. How the Flowsteer range maps onto water that ranges from clean to chemically hostile.
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Standards and Interchangeability
ANSI/ASME B73.1, ISO 2858, ISO 5199 and BS EN733. What each standard actually fixes, and what that means when a pump is replaced.
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Solution
Sealing and Bearing Solutions
Mechanical seals, gland packing, labyrinth and lip ring sealing, and where each belongs across the Flowsteer range.
Read moreInside the Works
Machining Assembly Test and Packing
Twelve photographs of the Flowsteer manufacturing floor, in the order a pump moves through it. None of them are stock images.
Knowledge Centre
Standards Materials and Maintenance Explained
Thirteen guides on the engineering behind the range, written for the person who has to specify, install or maintain the pump.
Standards Guide
ANSI/ASME B73.1 Explained
B73.1 is a dimensional standard, not a performance standard. Knowing the difference is what makes a replacement pump drop straight onto an existing baseplate.
Read moreStandards Guide
ISO 2858 vs ISO 5199
One standard says where the holes go. The other says how long the pump should last. Specifications usually need both.
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EN733 and DIN24255 Explained
Two names, one set of dimensions. Why both still appear on specifications and what they fix on an end-suction pump.
Read moreDesign Guide
Back Pull-Out Design
The single construction feature that decides whether a seal change takes two hours or two days.
Read moreDesign Guide
Open vs Closed Impellers
Efficiency on one side, solids passage and adjustability on the other. The choice is decided by the water, not the pump.
Read moreMaterial Guide
Pump Materials Guide
Grey iron through to UHMW-PE. What each wetted material is for, and the failure it is chosen to prevent.
Read moreIn Their Own Words
How the Company Is Run
Flowsteer states four principles that guide its development. They are reproduced here as published.
- Attention to the requirements, recommendations and customers' claims
- Analysis of customer satisfaction
- Constant checks of the effectiveness of the operational processes
- Continuous training of the personnel in cutting-edge technological innovations
Questions
Frequently Asked Questions
What kind of pumps does Flowsteer manufacture?
Water centrifugal pumps. Five horizontal series — ANSI CN, ISO CI, KCP lined, DE process and FA EN733 — plus the VNP vertical sump pump. Together they cover DN 25 to DN 400, flow to 1100 m3/h and head to 152 m.
Which standards do you build to?
ANSI/ASME B73.1 on the CN series, ISO 2858 with the ISO 5199 engineering class on the CI and KCP series, and BS EN733 / DIN24255 on the FA series.
Can you supply a pump to replace another manufacturer's unit?
That is what the dimensional standards are for. Send us the existing pump's size designation, flange rating and duty point and we will confirm whether a Flowsteer series matches it.
Do you publish certifications?
The source catalogue publishes no certification documents, so we list none rather than claim any. Tell us which approval your project requires and we will confirm in writing what can be supplied against it.
What information do you need for a quotation?
Flow in m3/h, total head in metres, supply frequency, liquid description with temperature and solids percentage, and the flange standard already installed. If it is a replacement, the existing nameplate details as well.
Do you supply complete pump sets or bare shaft pumps?
Both. A bare shaft pump suits a rebuild where the motor and baseplate stay in place; a complete set arrives with motor, coupling, coupling guard and baseplate.
Send Us the Duty Point and We Will Send Back a Selection
Flow, head, supply frequency and what the liquid is. That is enough for a series, a size and the specifications published for it.