How to Select the Best Progressive Cavity Pump?

Progressive cavity pumps are useful for a variety of applications and fluids. However, they are not perfect for every application, which can be said about most various types of pumps. Pump selection is always crucial. To achieve the best results for your specific fluid processing application, you must identify, configure, and operate the proper pump

What Is the Function of a Progressive Cavity Pump?

It is beneficial to grasp the fundamental functioning principles of a progressive cavity (PC) pump. An internal rotor is often a solid piece of metal with a single helix that rotates within a double-helix-shaped hollow. The spinning generates suction, which draws the process fluid through the pump.

Progressive cavity pumps are frequently used in applications where the fluid viscosity levels exceed what a normal centrifugal pump can handle efficiently. When the process fluid is abrasive or shear sensitive, PC pumps may be useful. Food production is a good example, as solid fruits suspended in a liquid do not want to be sheared as they pass through the pump.

Pump Selection for Progressive Cavity

When choosing the appropriate progressive cavity pump for your application, three crucial aspects to consider are:

Understand Your Fluid

Before selecting a progressive cavity pump, it is critical to understand your fluid(s). The physical properties of the fluids will then assist you establish the pump size, operating speed, and material. The key fluid parameters to consider are temperature, viscosity, and abrasive properties.

The lower the operating speed of the pump, the higher the viscosity. As a result, abrasive fluids will typically necessitate a larger progressive cavity pump that can operate at lower speeds. A smaller and quicker PC pump may be less efficient, and abrasive fluid wear will cause significant difficulties over time.

Furthermore, temperature has an impact on the performance and durability of the stator elastomer. As the temperature of the fluid rises, the elastomer stator will expand. Therefore, the stator material must be matched to the fluid temperature to produce the desired pumping results.

Flow Rate versus. Pressure

In general, a progressive cavity pump is an efficient solution when the needed pressure exceeds the flow rate (PSI > GPM). Operators frequently avoid utilizing PC pumps since they are typically most efficient at lower speeds—having a slower pump appears contradictory. Viscous, abrasive, and temperature-sensitive materials, on the other hand, might cause problems with other pumps with higher flow rates and speeds. Slow and steady, like the tortoise versus the hare, is sometimes all that is required to win the race!

Temperature

The minimum and maximum temperatures of the fluid to be pumped are specified. Along with this consideration, it is critical to understand the maximum temperature range of the stator material. If improper material is used, there is a potential that the stator can bulge and distort at high temperatures, reducing the pump's performance. Furthermore, if your fluid is pushed at extremely low temperatures, this may impact its viscosity, which influences the pump's horsepower requirements as well as flow characteristics.

Progressive Cavity Pump Risansi

Risansi is a world-class industrial pump manufacturers of progressive cavity pumps. They provide a good type of PC pumps in a variety of sizes, materials, and speeds to meet your requirements. If a progressive cavity solution is best for your operation, consider a Risansi pump.

Contact Risansi today to learn more about progressive cavity pumps and for assistance in determining the best pump size, material, and speed for your specific application. Allow our professional team to guide and advise you on pump selection.