Industry
Waste Water Treatment
Open impellers, polymer wetted parts and vertical sump pumps for screened sewage, return sludge, effluent and pit drainage.
Read more
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
Overview
When the water is the problem rather than the pressure, the answer is not a thicker casing. It is a wetted part the water cannot corrode.
The KCP series is a horizontal, single-stage, back-pull-out centrifugal pump with wetted parts in polypropylene, polyethylene or ultra-high-molecular-weight polyethylene. It handles water and waste water streams that would pit or dissolve a cast iron or stainless casing.
Capacity reaches 300 m³/h, differential head reaches 60 m and discharge branches run from DN 25 to DN 250. Drive ratings go to 200 kW and the pump takes an operating pressure to 10 bar.
Operating temperature spans -20 °C to +80 °C with a solids content limit of approximately 10 percent, so the series covers both cold effluent duties and warm process water without a change of construction.
KCP horizontal single-stage centrifugal pump with PP lined casing and grease-lubricated bearings
Key Benefits
What This Pump Does Better
- Polymer wetted partsPP, PE and UHMW-PE resist the acids, alkalis and chlorides that attack cast iron and stainless steel in dosed water.
- Wide drive rangeRatings to 200 kW mean the series is not limited to small auxiliary duties; it covers main transfer pumps too.
- Handles solidsA solids content limit of approximately 10 percent lets the pump take effluent and slurry-bearing water rather than clean liquid only.
- Choice of impellerClosed or semi-open impellers let the selection trade efficiency against solids passage.
- Back-pull-out constructionThe rotating assembly withdraws without disturbing the pipework, the same maintenance advantage as the metal ISO series.
In the Works
The Pump and How It Is Built
Application Scenarios
Where This Pump Is Put to Work
- Chemically dosed waterCoagulant, chlorine and pH-correction streams around a water treatment plant.
- Industrial effluentProcess waste water carrying up to roughly 10 percent solids.
- Warm process waterDuties up to 80 °C where a polymer lining is still within its service range.
- Corrosive transfer dutiesWater that has picked up salts or process chemistry and would shorten the life of a metal pump.
Who It Is For
- Water treatment plants running dosing and chemical conditioning lines where metal pumps fail early.
- Industrial sites with effluent streams that carry both solids and aggressive chemistry.
- Buyers replacing a metal pump that has corroded through faster than its bearing life.
Problems It Solves
What It Is Chosen to Fix
- Casings pitting and perforatingPP, PE and UHMW-PE wetted parts are not attacked by the chemistry that eats iron and stainless.
- Solids blocking a clean-water pumpA semi-open impeller and a roughly 10 percent solids limit let the pump take effluent.
- Replacing a corroded pump every seasonA lined pump changes the failure mode from material loss to normal bearing and seal wear.
- Undersized drives on chemical dutiesDrive ratings to 200 kW mean a lined pump can carry a main transfer duty, not just a dosing line.
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
- Horizontal, single-stage construction
- Back-pull-out design
- Closed or semi-open impeller
- Single mechanical seal
- Grease-lubricated bearings
- Welded base frame or cast iron base plate
Specifications
| Pump type | Horizontal, single-stage |
|---|---|
| Construction | Back-pull-out |
| Capacity | Up to 300 m³/h |
| Total differential head | Up to 60 m |
| Operating temperature | -20 °C to +80 °C |
| Operating pressure | Up to 10 bar |
| Discharge nozzle | DN 25 to DN 250 |
| Drive rating (P) | Up to 200 kW |
| Ambient temperature | 0 °C to 60 °C |
| Solids content limit | Approximately 10 % |
| Impeller | Closed or semi-open |
| Sealing | Single type |
| Bearing lubrication | Grease |
| Materials | PP, PE, UHMW-PE |
| Base | Welded base frame or cast iron base plate |
Materials
Wetted Materials and What They Are For
- Polypropylene (PP)The general-purpose lining for dosed and mildly aggressive water at moderate temperature.
- Polyethylene (PE)Chosen for its chemical breadth on cold effluent duties.
- UHMW-PEUsed where the stream is abrasive as well as corrosive; the high molecular weight raises wear resistance.
- Welded or cast baseA welded steel base frame or a cast iron base plate, selected against the driver and the foundation.
Customisation
What You Can Specify on This Pump
- Wetted material: PP, PE or UHMW-PE
- Impeller: closed for efficiency or semi-open for solids passage
- Base: welded steel base frame or cast iron base plate
- Discharge branch from DN 25 to DN 250 and drive rating to 200 kW
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 |
|---|---|---|
| KCP Series | Polymer wetted parts, 300 m³/h, 60 m, 200 kW | Water whose chemistry attacks metal |
| ISO CI Series | Metal wetted parts, 500 m³/h, 80 m | Clean and treated water where corrosion is not the limit |
| VNP Vertical | PP, vertical sump installation, 20 % solids | Sumps and pits rather than flooded suction |
Use Guide
Getting This Pump Right on Site
- Check the stream temperature against the 80 °C operating limit before selecting a polymer wetted part; polymers lose strength well before they melt.
- Confirm the solids percentage. Above roughly 10 percent the semi-open impeller is the right choice and the duty should be reviewed with us.
- Do not run a lined pump dry. Without liquid the polymer has no cooling and will distort long before a metal casing would.
- Specify the base type against the foundation: a cast iron base plate resists distortion better on an uneven pad than a welded frame.
Related
Industries Solutions and Guides
Industry
Industrial Water Transfer
Plant water, process circulation, booster and liquid transfer duties across the full Flowsteer size band.
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
Solution
Sealing and Bearing Solutions
Mechanical seals, gland packing, labyrinth and lip ring sealing, and where each belongs across the Flowsteer range.
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 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 more
Maintenance Guide
Operation and Maintenance Tips
A short list of the things that actually decide how long a water pump lasts, drawn from how these pumps are built rather than from general advice.
Read moreAlso in the range
Related Products
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
View specifications
VNP Series
VNP Vertical Sump Pump
Vertical single-stage sump pump in polypropylene for wet-pit installation with solids to 20 percent
View specifications
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
View specificationsQuestions
KCP Series Lined Water Centrifugal Pump FAQ
Which of PP, PE and UHMW-PE should I specify?
PP is the general-purpose choice for dosed water. PE widens chemical coverage on cold duties. UHMW-PE is for streams that are abrasive as well as corrosive. Send us the water analysis and the temperature and we will name the material.
What is the temperature limit?
The published operating temperature is -20 °C to +80 °C, with the pump's ambient range 0 °C to 60 °C. Above 80 °C the polymer wetted part is outside its service window and a metal pump should be selected instead.
How much solids can the KCP pass?
The published solids content limit is approximately 10 percent. For higher solids loading the VNP vertical pump is rated to approximately 20 percent.
Is the KCP a back-pull-out pump?
Yes. The rotating assembly withdraws with the casing left in the pipework, the same as the metal ISO series.
What drive rating can you supply?
Up to 200 kW. The pump also takes an operating pressure to 10 bar and discharge branches from DN 25 to DN 250.
Request a Quotation for the KCP Series
Send the duty point and the liquid description and we will confirm the size, the materials and any specification this page marks TBC.