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Peripheral pumps are a bit of a specialist tool, and once you need one nothing else will do. Instead of throwing water outward like a standard centrifugal, a peripheral pump uses a turbine impeller with vanes around its rim, and the liquid gets picked up and pushed forward repeatedly as it travels around the casing. The result is remarkably high pressure from a very compact, affordable pump, as long as your flow requirement stays modest.
Our Calpeda peripheral range is the T Series, with 19 models on the site covering the T, TM, CT and CTM variants. All have cast iron pump bodies, with brass turbine impellers on most models and bronze on a couple. Connections come in 3/4″, 1″ and 1 1/4″ BSP. Six models are single-phase on 230v and 13 are three-phase on 230/400v, so there is something for a domestic install and something for a plant room.
Because they are so small for the pressure they produce, these pumps get built into cooling and air-conditioning equipment, circulation loops and boiler feed systems all the time. They also do a neat job of lifting network pressure where local regulations allow. One thing to be clear on: peripheral pumps need clean liquid with no abrasives and no suspended solids, because the tight clearances that create the pressure are exactly what grit will destroy.
If your questions have not been answered here, get in touch with our team for more information.
A turbine impeller with small vanes around its edge spins inside a close-fitting casing. Liquid is picked up by a vane, thrown outward into the casing channel, then caught by the next vane and pushed forward again. This happens repeatedly as the liquid travels around the pump, and each pass adds pressure.
For high head at low flow, a peripheral pump gives you far more pressure per pound and per square inch of space than a comparable centrifugal. If you need 50 metres of head but only a few litres a minute, a peripheral is the efficient answer. For higher flows, stick with centrifugal.
Clean liquids only, with no abrasives and no suspended solids, and nothing chemically aggressive towards the pump materials. The internal clearances in a peripheral pump are very tight, and even fine grit will wear them open and destroy the pressure the pump can generate.
The T Series handles liquid from -10°C right up to 90°C, which is a genuinely wide window and part of why they suit heating and boiler feed work so well. Ambient temperature around the pump should stay below 40°C.
Absolutely! If you’re unsure which pump is the best fit for your application, our team is here to help. You can pop up to our live chat for instant support, or simply send your requirements and pump details to sales@tfpumps.com. One of our experts will quickly recommend the most suitable pump for your needs.
