Centrifugal PumpsWhen it comes to centrifugal pumps, there are several different categories. These include centrifugal vacuum pumps, liquid centrifugal pumps, radial flow pumps, mixed flow pumps, semi-axial and axial flow pumps, and multistate centrifugal pumps. Of these, semi-axial and radial flow pumps are the most commonly used.

Before purchasing just any type of pump, it’s essential to have some understanding of both volumetric and mechanical efficiency. Of course, when working with a reputable source, a company representative will gladly provide whatever information you need. However, it’s still a good idea to build your knowledge base ahead of time.

For the efficiency of centrifugal pumps, there are four distinct kinds. Along with volumetric and mechanical efficiencies, you should also learn the basics of the hydraulic and overall efficiencies. In layman’s terms, these formulas, whether for multistate centrifugal pumps or centrifugal vacuum pumps, ensure the most efficient operation possible.

  • Volumetric Efficiency – The official definition for this particular efficiency is the ratio of the actual flow rate that the pump delivers to the theoretical discharge flow rate. The latter is the flow rate void of any leakage. Typically, you would use this formula to determine the volume of liquid lost during the flow because of a leak.
  • Mechanical Efficiency – For the various types, including centrifugal vacuum pumps and others, the formula for this efficiency is the ratio of theoretical power the pump needs to operate to the actual power delivered to the pump itself. In this case, you would use this efficiency formula to identify power lost in specific moving parts such as the bearings. Ultimately, mechanical efficiency determines the amount of power a pump must have to perform optimally.
  • Hydraulic Efficiency – The mechanical energy of multistate centrifugal pumps and other types converts into hydraulic energy. This consists of flow, pressure, and velocity. The ratio formula for hydraulic efficiency is useful hydrodynamic energy in the form of fluid to the amount of mechanical energy delivered to the rotor. Smaller centrifugal pumps usually land in the 50 to 70 percent range. In comparison, larger ones typically reach efficiencies of 75 to 93 percent.
  • Overall Efficiency – The ratio formula for this is the output of actual power of centrifugal pumps to the input of actual power. The overall efficiency is what you would rely on to determine the amount of energy lost overall.

Buying From a Trusted Source

Whether you’re in the market for one of the types of centrifugal pumps mentioned or you already have one that needs servicing, you can always count on the experts at PFS Pumps. With years of experience in both areas, we guarantee quality and affordability. Contact us today for more information.