Industry
Industrial Water Transfer
Plant water, process circulation, booster and liquid transfer duties across the full Flowsteer size band.
Read more
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
Overview
The widest size band in the Flowsteer range — DN 25 through DN 400 on one hydraulic philosophy, for plants that would rather buy one series than five.
The DE process pump was developed by introducing foreign process-pump know-how into the Flowsteer range. It is built for water and waste water service across a size band from DN 25 to DN 400.
Flow reaches 600 m³/h. That size band is the widest of any Flowsteer series, which makes the DE the natural choice when a single plant needs small auxiliary pumps and large transfer pumps drawn from one family.
Buying one series across the size range narrows the spares list, shortens the training a maintenance team needs and makes the pump population easier to standardise on over time.
DE series water centrifugal pump on fabricated steel baseplate with coupling guard
Key Benefits
What This Pump Does Better
- The widest size band in the rangeDN 25 to DN 400 covers small auxiliary duties and large transfer duties from one series.
- Process-pump design heritageThe series was developed from introduced process-pump know-how rather than scaled up from a domestic water pump.
- Water and waste water on one designThe same construction covers clean water and waste water duties, so the selection does not force a second pump type.
- One family, one spares philosophyStandardising across the band cuts the number of distinct impellers, seals and bearings a store has to carry.
- Flow to 600 m³/hEnough capacity for main transfer duties without moving to a split-case pump.
In the Works
The Pump and How It Is Built
Application Scenarios
Where This Pump Is Put to Work
- Plant water transferMoving water between tanks, process stages and distribution headers.
- Waste water serviceHandling waste water streams where a general-purpose process pump is specified.
- Mixed-size pump populationsSites that need DN 25 auxiliary pumps and DN 400 transfer pumps from one supplier and one design.
- Standardisation programmesReplacing a mixed pump fleet with a single series over successive maintenance cycles.
Who It Is For
- Plant engineers consolidating a mixed pump fleet onto one series across a wide size range.
- Water and waste water operators who need both small and large pumps from one design family.
- Buyers who would rather manage one supplier relationship across the whole size band.
Problems It Solves
What It Is Chosen to Fix
- Five pump brands in one plantOne series covering DN 25 to DN 400 lets a standardisation programme actually finish.
- Spares stores that grow with every new pumpA single hydraulic family shares parts logic across the size band.
- Separate pumps for clean and waste waterThe DE construction covers both duties, so one selection serves two services.
- Capacity ceilings on general-purpose pumpsFlow to 600 m³/h keeps main transfer duties inside the series.
Technical
Features and Specifications
Every value below is taken from the Flowsteer product catalogue. Values the catalogue does not publish are marked TBC rather than estimated.
Technical Features
- End-suction process pump construction
- Size range DN 25 to DN 400
- Flow up to 600 m³/h
- Designed for water and waste water service
- Developed from introduced process-pump know-how
Specifications
| Pump type | Process-duty water centrifugal pump |
|---|---|
| Size range | DN 25 to DN 400 |
| Flow (Q) | ≤ 600 m³/h |
| Service | Water and waste water |
| Head (H) | TBCnot published on the source catalogue |
| Speed | TBCnot published on the source catalogue |
| Materials | TBCnot published on the source catalogue |
| Shaft seal | TBCnot published on the source catalogue |
Materials
Wetted Materials and What They Are For
- Material selection on requestThe source catalogue does not publish the DE series material list. Send us the water analysis and the duty and we will confirm the wetted materials available for the size you need.
- Cross-reference the metal seriesWhere the duty is clean or treated water, the material options published for the ANSI CN and ISO CI series are a useful guide to what is available.
- Polymer alternativeIf the analysis shows the water will attack metal, the KCP series in PP, PE or UHMW-PE covers the same service.
Customisation
What You Can Specify on This Pump
- Size selection from DN 25 to DN 400 against the duty point
- Bare shaft pump or complete set with motor, coupling and baseplate
- Material and sealing specification confirmed against the water analysis
- Clean water or waste water configuration
Certifications, production capacity and export markets are not published in the Flowsteer catalogue, so this site does not state them. Tell us what your project needs evidenced and we will confirm in writing.
How It Compares Within the Range
| Series | Published Envelope | Best Suited To |
|---|---|---|
| DE Series | DN 25 to DN 400, flow ≤ 600 m³/h | The widest size band, for standardisation across a plant |
| FA Series | DN 32 to DN 250, flow 2 to 1100 m³/h, head to 152 m | Higher head and flow on a published EN733 grid |
| ANSI CN Series | 1 in to 10 in, to 400 m³/h | Plants that specify the ANSI dimensional standard |
Use Guide
Getting This Pump Right on Site
- Send the duty point before selecting a size; the DN 25 to DN 400 band spans a very wide hydraulic range and the right size is not obvious from the pipe diameter alone.
- Where the source catalogue marks a value TBC, ask for written confirmation rather than assuming the figure from a neighbouring series.
- For waste water service, state the solids loading. If it is high, the KCP or VNP series may be the better selection.
- Standardising a plant on one series works best when the first order sets the material and sealing specification for the ones that follow.
Related
Industries Solutions and Guides
Industry
Municipal Water Supply
Transfer, distribution and booster duties on city water networks, with EN733 and ANSI footprints and a bronze impeller as standard.
Read more
Solution
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.
Read moreSolution
Pump Material Selection
Cast iron through to UHMW-PE. How the Flowsteer range maps onto water that ranges from clean to chemically hostile.
Read more
Buying Guide
How to Read a Pump Curve
A published envelope such as 2 to 1100 m3/h is a range of sizes, not the capability of any one pump. Here is how to get from it to a selection.
Read more
Troubleshooting Guide
NPSH and Cavitation
Cavitation is not a pump defect. It is a suction system defect that destroys the pump, and it is almost always designed in rather than developed.
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 moreAlso in the range
Related Products
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
View specifications
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
View specifications
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
View specificationsQuestions
DE Series Water Centrifugal Pump FAQ
What size range does the DE series cover?
DN 25 to DN 400, which is the widest band in the Flowsteer range. Flow reaches 600 m³/h.
Why are some specifications marked TBC?
Because the source catalogue does not publish them. We would rather mark a figure as unconfirmed than print a number we cannot stand behind. Ask us and we will confirm head, speed, materials and sealing for the size you need.
Can the DE handle waste water?
Yes. The series is specified for water and waste water application. For streams with heavy solids loading, tell us the percentage so we can check the DE against the KCP and VNP series.
What does 'introduced process-pump know-how' mean?
The source catalogue describes the DE as made by introducing foreign advanced process-pump know-how. In practice it means the hydraulic design came from process-pump practice rather than from a general water pump scaled up.
Is the DE suitable for a plant standardisation programme?
That is its main strength. One hydraulic family from DN 25 to DN 400 lets a site retire a mixed fleet over successive maintenance cycles without introducing a second design standard.
Request a Quotation for the DE Series
Send the duty point and the liquid description and we will confirm the size, the materials and any specification this page marks TBC.