Progressive Cavity Pumps, what are they?


Considering using a progressive cavity pump? These pumps are designed for heavy industrial applications in which pumping high viscosity fluids is necessary.
Learn all about how these pumps work and why you may need one in this short video (below). Colin Heathfield, Technical Sales Manager from our UK office, tells us all about it.

A progressive cavity pump is a type of positive displacement pump and is also known as a progressing cavity pump, progg cavity pump, rotary screw pump, eccentric screw pump or cavity pump. It transfers fluid by means of the progress, through the pump, of a sequence of small, fixed shape, discrete cavities, as its rotor is turned. This leads to the volumetric flow rate being proportional to the rotation rate (bidirectionally) and to low levels of shearing being applied to the pumped fluid. Hence these pumps have application in fluid metering and pumping of viscous or shear-sensitive materials. The cavities taper down toward their ends and overlap with their neighbours, so that, in general, no flow pulsing is caused by the arrival of cavities at the outlet, other than that caused by compression of the fluid or pump components.

Typical uses: Food and drink pumping, Oil pumping, Coal slurry pumping, Sewage and sludge pumping, Viscous chemical pumping, Stormflow screening, Downhole mud motors in oilfield directional drilling (it reverses the process, turning the hydraulic into mechanical power), Limited energy well water pumping

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WATCH our comprehensive video of progressive cavity pumps, including a discussion of the technology and its terms, strengths and drawbacks plus applications.




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