Difference Between Rotary Lobe Pump and Gear Pump | Bonvepumps.com

 positive displacement pump

Gear pump is a positive displacement pump, which has a pair of meshing gears. One driving gear is driven to rotate by the motor, and the other driven gear is meshed with the driving gear to rotate. When the two gears are gradually separated, a partial vacuum will be formed. The liquid is inhaled through the suction pipe under the action of atmospheric pressure, and the inhaled liquid is squeezed and pushed out by the gear along the inner wall of the pump, which features small handling and high lift.

Gear pumps use conveying media as the lubricating medium in rotation, and are generally used in oily media, otherwise they will cause great wear and reduce the service life to a large extent.


Bonve Rotary Lobe Pump



Rotary lobe pump consists of two lobe rotors, which rotate synchronously driven by a pair of synchronous gears in the gearbox. The rotors are driven by the main shaft and sub-shaft to rotate in a synchronous reverse direction, which changes the pump capacity, builds up high vacuum and discharge pressure, thus an efficient pumping is formed. Gap is kept between the rotors and between the pump casing. There are basically no vulnerable parts during operation, and it is easy cleaning and maintenance. It is the first choice for customers in liquid transportation at present.

Rotary lobe pump is used to transport the medium according to the volume change between the rotor and the pump casing, and can transport the medium with viscosity below 100000 CP. Applicable in food, daily chemical industry, fine chemical industry, papermaking, medicine and pharmacy, environmental protection, petroleum and other fields.


Below table shows the main difference between gear pump and rotary lobe pump:


Details


Rotary Lobe Pump


Rotor Gear Pump


Application


High viscosity, high density, high solid

products


General for oil products


Structure


Gap is kept between the rotors and between

the pump casing, no friction, long life, no

damage, no physical and chemical reaction to

the pumped products.

Gears mesh together, hard contact, wear.

Flow efficiency decreases after wearing, short service

life.


Simple structure, low failure rate,

easy to maintain.


The front end has a shaft sleeve, which is easy to wear.

The pump needs to be disassembled for replacement,

and the maintenance is complicated.


Spare Parts

for

Maintenance


Mechanical seal and O-ring


Mechanical seal and O-ring


/

Shaft sleeve


/

Gears




Rotary lobe pump is more ideal to select for no frequent wearing parts to replace, easier maintenance and longer service life.

To find out more about Bonve rotary lobe pump, Click on the picture below

Email: trade@bonvepumps.com


China Pumps for Food Industry manufacturer



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