If you have ever moved water through a pipe at any scale, the odds are a centrifugal pump did the work. They are the most widely used pump type in industry, agriculture and building services, spinning an impeller to turn motor energy into flow and pressure. Clean water, mild chemicals, hot liquids, lightly contaminated fluids; a centrifugal pump handles most of what a typical site throws at it.
We supply centrifugal pumps from the leading European names in cast iron, stainless steel and engineered plastic, and we can source other brands when a duty needs something specific. The ranges are below, or talk it through with us on +44 1332 913500.
We also cover Magnetic Drive, Flexible Impeller and Multistage pumps on their own pages.
A centrifugal pump is a rotodynamic pump that moves liquid with a spinning impeller. Fluid enters at the centre of the impeller, gets flung outward by centrifugal force, and passes into a volute or diffuser casing where that speed becomes pressure. The output is a smooth, continuous flow at the head and rate the system needs.
What makes them so common is how little there is to go wrong. With essentially just an impeller and a shaft as moving parts, they are low-maintenance and long-lived, and they handle clean or mildly dirty liquids at moderate to high flow rates more cheaply than any other design.
The impeller sets the pump’s character. Its diameter, vane shape and configuration determine the flow, the head and how well it copes with solids. Impellers come open, semi-open or closed, each a different trade-off between efficiency and solids handling. The mechanics of all this, how the stages and casing turn rotation into pressure, are covered in our guide: How Do Centrifugal Pumps Work?
End suction pumps are the default. Liquid comes in axially through the suction eye and leaves radially from the top of the casing. Compact, affordable and easy to service, they cover the bulk of commercial and industrial clean-water duty.
Self priming centrifugal pumps clear air from the suction line and prime themselves, so they work where the pump sits above the liquid and the suction line may hold air at start-up. A self priming centrifugal pump recirculates liquid internally to expel that air before settling into normal pumping, which suits surface-mounted installs, tank emptying and irrigation.
Stainless steel centrifugal pumps are built in 304 or 316 for corrosion resistance, hygiene and durability. You specify a stainless steel centrifugal pump when the liquid is aggressive or hot, or when the application demands sanitary construction: food and beverage, pharmaceutical, chemical processing, potable water.
Close-coupled and long-coupled designs differ in how the pump meets the motor. Close-coupled mounts the impeller straight onto the motor shaft for a tight footprint; long-coupled uses a separate bearing frame and coupling so the motor can be swapped independently. Which one fits depends on space, maintenance access and motor spec.
The same pump family covers a very wide spread of duty. What changes between jobs is the material, the configuration and the size of the machine, not the working principle.
Centrifugal pumps cover most clean and mildly contaminated liquid duty, but they are not the answer to everything. If your duty falls into one of these, start on the page listed instead.
Selection comes down to matching the pump curve to your duty point, where required flow meets total head. You need the flow in m³/hr or l/s, the total head (static lift plus friction losses plus residual pressure), the liquid and its temperature, and the power supply. Our flow, head and pipe sizing calculators will help you work those out. Material follows the liquid: cast iron for clean water, stainless for aggressive or hygienic duty, engineered plastics for particular chemical resistance.
We supply from Braude, Calpeda, Ebara, Enviroflex, Lowara, Pedrollo, Pentair, Pentax and Varisco, and will look further afield if a project calls for it. Give us the duty on +44 1332 913500 and we will pin down the right pump, or request a quote online.
For the engineering behind the pumps, two guides on our blog go deeper:
If your questions have not been answered here, get in touch with our team for more information.
Centrifugal pumps are used to move liquids through piping systems. Common applications include water supply and distribution, industrial process water, irrigation, HVAC systems, chemical transfer and general fluid handling across most industries. They are the default choice for any duty that involves moving clean or mildly contaminated liquids at moderate to high flow rates.
A centrifugal pump uses a rotating impeller to impart velocity and pressure to the liquid continuously. A positive displacement pump traps a fixed volume of liquid and forces it through the discharge. Centrifugal pumps suit high-flow, low-viscosity applications; positive displacement pumps suit high-viscosity liquids or duties requiring precise metering.
Usually yes. Send us the make, model and serial number from the nameplate, or a photograph of it, along with the pipework connections and the space you have to work in. Where a range has been discontinued we will identify the current equivalent and confirm whether the footprint, connections and duty still match before you commit.
The usual causes are a loss of prime, a blocked or partially closed suction line, an air leak on the suction side, a worn impeller or wear ring, or a closed discharge valve. Cavitation from insufficient suction pressure produces a rattling noise and falling performance. If the pump is running but delivering nothing, check the suction side first, since that is where most of these faults sit.
Yes. We supply seals, impellers, wear rings, bearings, shafts and full repair kits across the ranges we sell. Send us the pump model and serial number and we will identify the parts you need. Our repair and refurbishment service is often the better option on a larger or specialist unit.
