A Better, Faster Way to Source Pumps

Lobe Pumps

What is a lobe pump?

A type of positive displacement pump that moves liquid by passing it across two rotors containing lobes. Each rotor is located on its own shaft, with the lobes meshing as they rotate inside the pump casing. The pump very gently moves liquids containing fragile solids, and is available in sanitary (hygienic) designs, so this pump type is particularly popular in the food, beverage, and biotech industries.

How do they work?

As the two rotors, each of which has two or three lobes, turn in the casing, a vacuum is created at the inlet, which draws the liquid into the pump. As the rotors turn, the liquid is carried between the spaces created between the lobes and the casing.

A lobe pump is similar in concept to an external gear pump. However, unlike the gears used in a gear pump, the lobes in a lobe pump do not come in contact with each other as they rotate. That is, one lobe cannot drive the other one. Instead, external timing gears that are outside of the pump casing and in an oil bath, but mounted on the same two shafts, assure that the lobes keep a very precise and close clearance as they rotate, without ever making contact.

The main advantage is that the rounded edges of the lobes and the large spaces between the lobes and the casing means that fluid containing fragile solids can be pumped gently, with minimal damage to any solids that are in the fluid.

Where are they used?

Because lobe pumps are very gentle and are available in sanitary (hygienic) designs, they're commonly used for moving and processing food-based liquids, especially those that have some solid content. For example, they are used to pump soups and ice cream containing nuts or fruit. They’re also used to handle fermentation products in bio-processing, and in industrial applications for the processing of materials such as polymers, soaps, paints, and adhesives. Non-sanitary versions are used to handle wastewater sludge.

Like what you read?

Expert Advice

Switch to: Industry Updates | Pump Tweets
Rotary Lobe Pump Innovation

In designing the TORNADO® T2 rotary lobe pump, NETZSCH engineers challenged the traditional conceptions of rotary pump design in an effort to increase pump reliability, ease of maintenance, performance, and decrease cost. Read about the innovation they discovered.

5 key tips for specifying a pump

Pumps are available in many different types and configurations. The key to finding the right pump for the job involves asking the right questions.

Helpful tips to extend the life of your pump

Dr. Lev Nelik recommends some valuable steps you can take to extend the life of your pump and ensure its operating under optimum conditions.

Read All

Industry Updates

Switch to: Expert Advice | Pump Tweets
Wastecorp Pumps announces new pumps for marine sanitation and bilge pumping

Just in time for boating season, Wastecorp Pumps recently debuted a new pump product line designed for marine sanitation and bilge pumping.

Thompson Pump's compact pump series combines powerful pump with smaller size

Thompson Pump’s compact pump series provides the advantages of the Thompson Pump JSC series with the benefits of a smaller size.

Double hose - diaphragm pumps guarantee minimum pulsation and wear

Double hose-diaphragm pumps in quintuplex configuration guarantee minimum pulsation and wear. German pump manufacturer Feluwa's Multisafe double hose - diaphragms pumps make easy work of moving aggressive or abrasive products long distrance, according to a company news release.

Read All

Pump Tweets

Switch to: Expert Advice | Industry Updates

ITT Corp completes its acquisition of Blakers Pump Engineers. Blakers Pump Engineers is a long-time distributor of the Goulds Pumps brand in Australia. The company sells horizontal and vertical centrifugal pumps for the oil & gas, mining, water treatment, refining and other markets.

Sulzer agrees to purchase Spanish pump company Hidrotecar SA. With the acquisition hopes to improve its water pump business throughout Europe, Middle East and Aftrica.

Lufkin Industries plans to purchase Zenith Oilfield Technology. Zenith is a developer of systems for down-hole monitoring, data gathering and control systems. The company also offers real-time optimization and control devices specifically for electric submersible pumps (ESPs) and progressing cavity pumps (PCPs).

Read All