What Pulsation Means In Your Production Process

When buying a pump not only a cheap investment price counts. The lifecycle costs often can exceed this several times. One of the biggest causes for high oncosts is pulsation.

Similar to a stop-and-go situation in traffic, pulsation has several negative effects, such as:

  • Higher energy consumption
  • Extra wear on the pump unit and the connected pipeline system
  • Component failure causes extra production stops
  • Extra costs for compensating the pulsation (air vessels, etc.)
  • Lower quality of the end product

Our Rotary Lobe Pump Reduces the Pulsation to the Absolute Minimum

Pulsation curve on a two-wing rotary lobe pump As you see from the figure above normal rotary lobe pumps have a straight two-wing design. The function for the volume is almost sinus shaped. The two rotors causing high pulsation.

Pulsation curve on a three-wing rotary lobe pump Some rotary lobe pumps on the market using rotors with three or four wings. Due to an overlay of more curves the pulsation amplitude is reduced, but still exists.

Pulsation curve on a Herold rotary lobe pump Our rotary lobe pump solves this problem on a different and better way. We twisted our rotors against each other by 90 °. We can simplify the rotor by cutting it into several slices (n). Every single splice then is a straight rotor. On the normal rotor is n=∞, that means your pulsation amplitude is reduced to the absolute minimum. Due to the overlay of 270 °, one rotor compensates the pulsation rate of the other. That reduces the pulsation and vibration to the absolute minimum—you'll have the lowest energy consumption and an exceptional economical flow of medium.

A small coin stands on a running Herold rotary lobe pump Our pump runs so smooth, that you can put a coin on its top and it keep standing. Due to the low pulsation the customer also benefit with a reduced noise level.