Pros and Cons of Progressive Cavity Pumps

A progressive cavity pump is a positive displacement pump with two fundamental pumping elements, the rotor, and the stator. It is called PC pumps, Progressive Cavity Pump, Progressing Cavity Pumps, Eccentric Screw pump, single screw pump, or Cavity pump. It moves liquid through a rotor turning inside a stator with additional cavities where the liquid progress in a succession of little, fixed shape, discrete cavities.

Because of the benefits due to this design, progressive cavity pumps have applications from fluid metering (Positive Displacement), and pumping of viscous or shear-delicate materials, to chemical transfer.

Applications of Progressive Pump

Progressive cavity pumps are utilized in numerous applications, from wastewater treatment to oil or food and refreshments. They are appropriate for solids, liquids with low to high viscosity, abrasive, and harmful or destructive media. Here are only a couple of the possible applications for PC pumps -Slurry and sludge transfer, Oils (non-endlessly greasing up), Beauty care products, creams, and moisturizers, Paint, varnish, Adhesives, Shear-sensitive fruits, vegetables, etc.

Pros of Progressive Cavity Pumps

✏ High overall system energy efficiency, typically in the 55 to 75% range.

✏ Ability to produce high concentrations of sand or other produced solids.

✏ Relatively simple installation and operation.

✏ Generally low maintenance.

✏ Low profile surface equipment.

✏ Low surface noise levels.

✏ Ability to tolerate high percentages of free gas.

✏ No valves or reciprocating parts to clog, gas lock, or wear.

✏ Good abrasion resistance.

✏ Low internal shear rates.

✏ Relatively low power costs and continuous power demand.

Cons

➽ A fluid film is needed to keep the sliding surfaces lubricated. These pumps fail when run dry.

➽ PC pumps can only pump a limited distance.

➽ These pumps are slower moving and don’t produce large amounts of flow. This can be addressed with VFD and/or gear reducers that increase installation costs.

➽ The volumetric efficiency of the pump can be affected when viscous fluid doesn’t flow quickly enough into the pump. This means that speed limits for the given fluid and viscosity are important.

➽ Slippage rates can be high due to the rotor/stator fits, causing the pump to be less efficient.

The progressive cavity pump suits many applications across a wide spectrum of industries. If you’d like to get one such high-quality progressive cavity pump, contact Risansi Industries Ltd. Our pump will be a good fit for your application. Our experts will help you choose, install, and maintain a variety of equipment. If we help you through the pump installation, processing, and maintenance. Call us to know more about the pump.