Progressive cavity pumps are part of the positive displacement pump family. Each of the positive displacement pumps we have covered in the previous Quick and Dirty Guides (external gear, internal gear, rotary lobe, peristaltic, and diaphragm) have unique designs and capabilities. The progressive cavity pump is no different.
PROGRESSIVE CAVITY PUMP OVERVIEWProgressive cavity pumps are characterized by a helical shaped rotor and flexible or rigid formed elastomer stator that pumps viscous liquids at high pressures.
HOW IT WORKSAs the rotor turns, cavities are opened and closed, progressively transferring the liquid from one cavity to the next, and ultimately discharging the liquid at the required system pressure.
WHAT THEY’RE GREAT FORUnlike some positive displacement pumps that lose efficiency with low viscosity fluids, progressive cavity pumps easily handle both low and highly viscous material. They’re also good for small, shear sensitive solids like fruits and vegetables. They are specifically designed to handle abrasive and corrosive fluids.
WHAT THEY’RE NOT SO GREAT FORProgressive cavity pumps are slower moving pumps, and don’t produce large amounts of flow like a centrifugal pump does.
THEIR BEST APPLICATIONSProgressive cavity pumps are used in a wide range of applications fromwastewater treatment, to oil, to food and beverage. Here are just a few of the applications where a progressive cavity could be found:
- Slurry and sludge transfer
- Cosmetics, creams, and lotions
- Paint, varnish
- Fruits and vegetables
The progressive cavity pump is ideal for many applications across a wide spectrum of industries. Think it might be right for yours? Make sure you get the right pump for the job by talking to an experienced engineer. If you need help selecting the right pump for your application, ask us about it! We gladly provide technical assistance to businesses in Wisconsin and Upper Michigan.