Pye Barker Engineered Solutions, lobe pumps, Florida, Georgia

We’re back for another edition of “Know Your Pumps.” This time we take a look at another member of the positive displacement pump family: lobe pumps.

How Do They Work?

Lobe pumps are similar to external gear pumps in operation, except the pumping elements or lobes do not make contact. Lobe contact is prevented by external timing gears producing a continuous (non-pulsating) discharge.

Pump shaft support bearings are located in the timing gear case. Since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection. There is not metal-to-metal contact and wear in abrasive applications is minimal. Use of multiple mechanical seals makes seal construction important.

Lobe pumps are frequently used in food applications, because they handle solids without damaging the pump or the product. Lobe pumps can pump much larger particles than can other positive displacement pumps.

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 considerably reduced speeds to achieve satisfactory performance.

Lobe pumps are cleaned by circulating a fluid through them. Cleaning is important when the product cannot remain in the pumps for sanitary reasons or when products of different colors or properties are batched.

What Do We Use Them For?

Lobe pumps are suitable for pumping materials such as polymers, paper coatings, soaps and surfactants, paints and dyes, rubber and adhesives, pharmaceuticals and food applications.

Score Card





Viscous Liquids Solids Dry Prime Diff. Pressure
How well does a Lobe Pump handle it?







E = Excellent, G = Good, A = Average, P = Poor


Savannah Office Address:
1105 Louisville Rd
Savannah, GA 31415
TEL: (912) 238-0303
FAX: (912) 238-5214
Forest Park (Atlanta) Address:
121 Royal Dr.
Forest Park, GA 30297
TEL: (404) 647-0986
FAX: (404) 361-8579
Sylvania Address:
452 Industrial Park Rd.
Sylvania GA 30467
FAX: (912) 564-2636
Orlando, FL Address:
524 Mid-Florida Dr., Suite 204
Orlando, FL 32824
FAX: (321) 282-6424
Main Switchboard:

(404) 647-0986

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