Theory of Operation:
Positive Displacement Pumps
The Waukesha Universal Series positive displacement pump operates on a rotary lobe principle, using two precision-engineered rotors that turn in synchronization within a close-clearance rotor case. As the rotors rotate, they create expanding cavities on the inlet side of the pump. This expansion draws product into the pump chamber without excessive shear or turbulence, making it ideal for high-viscosity, shear-sensitive, or particulate-laden fluids.
As the rotors continue to rotate, the cavities carry the product around the periphery of the rotor case. On the discharge side, the cavities contract, forcing product out of the pump and into the process line. Because the rotors never actually touch each other or the pump housing, the design maintains tight, repeatable flow with minimal product slip — even under high discharge pressures.