Lobe pumps are a great alternative to a standard gear pump. If you have solids that need to be processed, a lobe pump may be right for you. We are distributors for Ampco and Jabsco Lobe Pumps.
Lobe Pump Applications
Lobe pumps are useful for a range of industries, including:
- Food and beverage
- Pulp and paper
How It Works
Rotary lobe pumps are non-contacting and have large pumping chambers, allowing them to handle solids such as cherries or olives without damage. They are also used to handle slurries, pastes, and a wide variety of other liquids. If wetted, they offer self-priming performance. A gentle pumping action minimizes product degradation. Rotary lobe pumps also offer reversible flows and can operate dry for extended periods of time. Flow is relatively independent of changes in process pressure, so output is constant and continuous.
Operationally Lobe pumps are similar to external gear pumps in that fluid flows around the interior of the casing. Unlike external gear pumps, however, the lobes do not make contact. Lobe contact is prevented by external timing gears located in the gearbox. Pump shaft support bearings are located in the gearbox, and since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection.
Lobe pumps are frequently used in food applications because they handle solids without damaging the product. Particle sizes can be much larger in lobe pumps than in other PD types. Since the lobes do not make contact, and clearances are not as close as in other PD pumps, this design handles low viscosity liquids with diminished performance. Loading characteristics are not as good as other designs, and suction ability is low. High-viscosity liquids require reduced speeds to achieve satisfactory performance. Reductions of 25% of rated speed and lower are common with high-viscosity liquids.
We’re a leading supplier of rotary lobe pumps on the west coast. With locations in Arizona, California, Idaho, Montana, Washington and Northern Mexico, we can get you the lobe pump you need – fast. Contact us for more lobe pump options.